Dissertations / Theses: 'Closed-loop supply chain (CLSC)'

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Palmquist, Anna, and Sebastian Gersér. "Waste of money, or money of waste? Ekonomisk lönsamhet vid insamling av returmaterial." Thesis, Blekinge Tekniska Högskola, Institutionen för industriell ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-12828.

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Den ökade konsumtionen i dagens samhälle leder till en större efterfrågan på nya råvaror. Samtidigt är jordens resurser begränsade och råvarupriserna höjs i samband med att resurserna håller på att ta slut. Därför är det viktigt att ta till vara på de resurser som finns genom att öka nyttjandegraden av material och sluta produkters livscykler, då kan materialet återvinnas och återanvändas vid tillverkning av nya produkter. Om tillverkande företag väljer att använda återvunnet material i sin produktion sparas jordens resurser in eftersom inte en lika stor mängd jungfruligt material behövs. Det bidrar till en ekologisk vinst som i vissa fall också kan leda till en ekonomisk vinst. Syftet med arbetet var att undersöka om materialåtervinningen kan göras ekonomiskt lönsam för de företag som väljer att sluta produkters livscykler och samla in returmaterialet. Detta genomfördes genom att undersöka vilka faktorer som påverkar den ekonomiska lönsamheten i värdekedjan och hur insamlingssystemet bör utformas för att maximera mängden insamlat installationsspill. För att kunna genomföra arbetet har vetenskaplig litteratur i form av rapporter och artiklar studerats för de ämnesspecifika områdena som studien behandlar, dessa stod till grund för rapportens teoretiska del. Sedan genomfördes en empirisk datainsamling i form av kvalitativ numerisk data, intervjuer hölls med golvläggare och logistikansvarig för extern returmaterialshantering. Utöver detta genomfördes observationer av uppvisade beteenden relaterat till insamling av installationsspill ute på byggarbetsplatser. En kvantitativ fältstudie genomfördes också som inkluderade respektive installationsprojekt. Resultatet av studien visar att generellt sätt är golvläggare positiva till att samla in returmaterial utan att företaget får betalt genom ekonomiska styrmedel så länge insamlingen inte medför något extra arbete. De resterande aktörerna i den omvända flödeskedjan har ett större ekonomiskt incitament än ett ekologiskt incitament till att medverka för att samla in returmaterial. Det försvårar för producenten att skapa en ekonomiskt lönsam returmaterialshantering då det skapas höga kostnader som produktens vinstmarginal ska klara av att täcka. Transport är den faktor som ackumulerar störst kostnad per insamlad enhet. För att sänka kostnaderna är det nödvändigt att returmaterial i höga kvantiteter och med hög kvalitet samlas in. Om ett företag lyckas skapa en lönsam returmaterialshantering kan det leda till minskade kostnader i form av material- och produktionskostnader. Resultatets betydelse från studien är viktig då det saknas studier som direkt behandlar och visar hur returmaterialshantering kan genomföras och göras ekonomiskt lönsam. Därmed bidrar studien till vidare diskussion och inspiration. Studien avgränsas till att analysera den ekonomiska lönsamheten av den externa returmaterialshanteringen.
The increased consumption in the modern society leads to a higher demand for new raw materials. At the same time, the earth's resources are limited and the prices increase when the resources decrease. Therefore, it is important to take advantage of the resources by increasing the utilization rate of material and close product lifecycles. The material can be recycled and reused in the manufacture of new products. If manufacturing companies choose to use recycled materials in their production the earth’s resources would be saved because less virgin material is needed. This contributes to an ecological profit which in some cases may also lead to a financial gain. The purpose of this work was to investigate whether recycling of materials could be economically profitable for the companies that choose to close product lifecycles and collect the end-of-use material. This was done by examining the factors that affect the economic viability of the value chain and how the collection system should be designed to maximize the amount of collected installation waste. In order to implement the work, scientific literature in the form of reports and articles are studied in the subject-specific areas that the study covers, these were the basis for the report's theoretical part. An empirical data collection was also done in the form of qualitative numerical data, interviews were held with flooring contractors and the logistics manager for external recycled material, and observations were conducted of exhibited behaviors related to the collection of installation waste out on construction sites. A quantitative field study was also conducted which included each installation project. The results of the study show that the flooring contractors are generally positive to collecting recycling material without any financial benefits as long as it does not involve any additional work. The remaining companies in the reverse supply chain have a higher financial incentive than an ecological incentive to participate and collect recycling material. This makes it difficult for the producer to create an economically viable collection system of recycling materials since it creates too high costs for the product's profit margin to be able to cover these costs. Transport is the factor that accumulates the highest cost per collected unit. To reduce the costs it is necessary to return material in high quantities and with high quality. If a company manages to create a profitable return of used materials it can lead to reduced costs in terms of material and production costs. The impact of the result is important because there are no or just a few previous studies that directly treat and show how a system of collecting recycling material can be implemented in a company and be economically viable. The study contributes to further discussions and inspiration. The study is limited to analyzing the economic viability of the external collection system of recycling material.

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Larsson, Joel, and BEICHEN CHEN. "Sales and Operations planning : Complexities in the S&OP/CLSC interface." Thesis, KTH, Industriell Management, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-165544.

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Environmental concerns are increasing in today's marketplace as well as the pressure for companies tobe as efficient as possible in order to retain and gain market share. This has led to a need forstandardized processes. A process that has become increasingly more common in companies is thesales and operations planning (S&OP) process which aims to match demand with supply. With theenvironmental concern growing in interest it is becoming more important for companies to reuse aproduct in order to utilize the remaining value of the product. This if often only done if there isfinancial gains from the commitment. This is done in a closed loop supply chain where OriginalEquipment Manufacturers (OEM) takes back and remanufacture, refurbish and repair used products.With a growing interest in closed loop supply chains it is becoming increasingly more important forcompanies to be efficient in this area as well. The focal company of this study is working with theirsales and operations planning process as well as with remanufactured products in order to becomemore efficient with their processes they want to integrate the remanufactured products, in this studycalled R2 products into the already existing S&OP process. The aim of this study was hence toinvestigate what complexities that may arise when remanufactured products are integrated into anS&OP process, i.e. what challenges that would occur when remanufactured products were brought into the S&OP process. The case design included semi-structured interviews as the main data source. The results of the studyshowed that complexities may arise in all five steps of the S&OP process. The main findings showedthat the biggest impact of integration would be in the first two stages of the five step process, havingthe most complexities. This study has both academic and managerial implications. In academia thestudy contributes with knowledge in an interface which at the time of this study has been paid verylittle attention in research. This study also provides researchers with a conceptual framework whichcan be tested in other settings and used as a basis for further evaluation of this interface. Themanagerial implications comes from having the possibility by this study to know potential areas thatwill need extra attention before an integration of remanufactured products is conducted. Theframework presented in this study can provide managers with a checklist to follow in the integrationprocess.
Den miljömässiga medvetenheten på dagens marknader ökar och likaså trycket på företag att vara så effektiva som möjligt för att behålla och vinna markandsandelar. Detta har lett till att behov av att standardisera processer där en mer vanligt förekommande process är sälj- och verksamhetsledningsprocessen (Sales and Operations Planning) som har till uppgift att balansera utbud och efterfrågan. Med den ökande miljömässiga medvetenheten blir det mer och mer viktigt för företag att öka längden på produktens livscykel genom att ta tillvara på det resterande värdet när den initiala kunden nått sitt slut på användandet. Detta görs dock ofta endast om det även är lönsamt för företaget. Detta görs i en så kallad sluten försörjningskedja (closed loop supply chain) där originaltillverkare tar tillbaka produkter och omarbetar dem för att ge dem nytt liv. Med ökande intresse och globalt tryck om hållbarhet är även detta ett område där företag börjar sträva mot att bli mer effektiva. Fallföretaget i denna studie arbetar med sälj och verksamhetsledning, tillika med omarbetade produkter. För att blir att öka effektiviteten i deras processer vill de därför integrera deras omarbetade produkter i den befintliga sälj och verksamhetsledningsprocessen. I denna studie kallas dessa produkter för R2. Syftet med denna studie var således att undersöka vilka komplexiteter som kan uppkomma vid denna integrering. Det vill säga, vilka oväntade utmaningar som kan framkomma när R2 produkterna integreras i sälj och verksamhetsledningsprocessen. Fallstudiens utformning inkluderade semistrukturerade intervjuer som huvudsaklig datakälla. Resultaten av studien visade att komplexiteter kan uppkomma i alla fem delar av sälj- och verksamhetsledningsprocessen. De huvudsakliga resultaten visade dock att den största påverkan skulle hamna i de första två stegen av den fördefinierade femstegsprocessen. Denna studie har både akademiska och praktiska implikationer. För akademin bidrar studien med kunskap i gränssnittet mellan sälj- och verksamhetsledning och omarbetade produkter. Den bidrar också med ett konceptuellt ramverk som kan användas av forskare för att vidareutveckla och utvärdera gränssnittet. De praktiska implikationerna kommer från att denna studie ger möjlighet för beslutsfattare i företage att förstå potentiella områden som behöver extra uppmärksamhet före en integration av omarbetade produkter genomförs.

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Olausson, Rebecka. "Optimering av lagerplatser för returemballage : En fallstudie på Linde Gas AB i Enköping." Thesis, Uppsala universitet, Institutionen för samhällsbyggnad och industriell teknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-420287.

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Undersökningen är uppbyggd av en kvantitativ fallstudie, där en datainsamling i form av företagsinterna dokument och intervjuer har utförts för att kunna besvara studiens syfte och frågeställningar. För skapa ett underlag som ska styrka den insamlade datan från fallstudien har även en sökning efter lämpliga teorier och metoder genomförts med fokus på studentlitteratur och vetenskapliga artiklar tillhörande ämnesområdet. Syftet med denna studie är att optimera antalet cylindrar på Linde Gas AB i Enköping genom att effektivisera materialflödet för industrigaser på anläggningen. Den pågående centraliseringen av Lindes fabriker, där flertalet verksamheter konsolideras till Enköping, bidrar till ett överskott av cylindrar. Ett överskott som skapar oreda bland cylindrarna i det operativa flödet. Detta leder i sin tur till onödigt långa körtider för truckförarna att hämta och lämna cylindrar på lagerhållningsytan, där både tomma och fulla cylindrar lagerhålls. Resultatet av studien visar på en viss osäkerhet i systemtillförlitligheten, vilket innebär att lagersaldot som redovisas i systemet inte överensstämmer med det verkliga lagersaldot. Detta visar därmed på en låg grad av lagersaldosäkerhet i det systemstödet SAP. Resultat från intervjuer och granskning av dokument indikerar även på att det finns ett överskott av cylindrar på anläggningen i Enköping, men på grund av osäkerheten i lagersaldot är det omöjligt att göra en kvantifierad bedömning av hur stort överskottet är. Av resultatet framgår även att det finns två typer av överskott, ett permanent överskott och ett säsongsvarierande överskott. Studien kommer därmed fram till att de överskottscylindrar som inte tillför någon nytta i det operativa flödet bör förflyttas till en alternativ lagerhållningsyta på anläggningen i Enköping. De säsongsvarierande produkterna beräknas återgå till det operativa flödet inför högsäsong igen medan det permanenta överskottet inte beräknas återgå till det operativa flödet utan bör snarare undersökas vidare för eventuell förflyttning till en annan anläggning. Analyser av resultatet med hjälp av metoder och verktyg som processkartläggning, materialflödesanalys, processanalysschema samt kostnadsanalyser genererar slutligen ett förbättringsförslag i form av en rutinbeskrivning för hur Linde bör hantera det överskott som finns. Denna rutinbeskrivning bör utifrån ett lean- och ekonomiskt perspektiv implementeras tidigt i materialflödet för att undanflyttningen ska generera en besparing i form av att eliminera slöserier som överproduktion, onödig truckkörning och stora buffertlager. De slutsatser som dras är dock att Linde bör uppdatera sina grundläggande stödprocesser för bland annat utförandet av inventeringar, innan en implementering av den rutinbeskrivning som tagits fram i denna studie är möjlig att genomföra.
This is primary a quantitative case study based on data that has been collected in terms of internal documents and interviews. This has been done to make sure to answer the purpose and questions of statement in this study. In order to create a foundation that will support the data collected from the case study, suitable theories and methods has also been collected by focusing on student literature and scientific articles related to the subject area. The purpose of this study is to optimize the number of cylinders at Linde Gas AB in Enköping by mapping the material flow for industrial gases at the plant. The ongoing centralization of Lindes´ plants in Sweden, in which some plants are consolidating their operations to Enköping, contributes to an excess of cylinders. An excess that creates disorder among the cylinders in the operational flow. This also leads to unnecessarily long driving times for truck drivers to pick and unload cylinders on the storage location, where both empty and full cylinders are being stored. The results of the study are showing a certain insecurity in the system reliability, which means that the stock levels that are reported in the system do not match the actual stock levels at the site. This indicates a low degree of stock accuracy in the support system SAP. Results from interviews and reviews of documents also indicates that there is an excess of cylinders at site in Enköping, but uncertainties in stock accuracy makes it impossible to estimate the extent of the excess there is. The result also shows that there are two types of excess, a permanent excess and a seasonally varying excess. The conclusion is that the excess cylinders that do not add any benefit in the operational flow should be moved to an alternative storage area at the plant in Enköping. Where the seasonally varying products are expected to return in the operational flow in times of high season, while the permanent excess is not expected to return in the operational flow, but should instead be further investigated for possible relocation to another facility. Analyzes of the results has been made by using methods and tools in terms of process mapping, material flow analysis, process analysis schedule and cost analysis. This is generating an improvement proposal in terms of a routine description of how Linde should handle the excess at site. This routine description should be based on a lean- and economic perspective, being implemented as early on in the material flow as possible to make sure that the transportation of cylinders will be generating savings in order to eliminate waste, such as overproduction, unnecessary truck driving and large stocks. The conclusion is however that Linde should update their supportive processes of how inventories should be done, before an implementation of the routine description presented in this study is possible.

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Lebreton, Baptiste. "Strategic closed-loop supply chain management." Palo Alto, Calif. : Ebrary, 2007. http://site.ebrary.com/id/10152065.

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Banerjee, Saikat M. Eng Massachusetts Institute of Technology. "E-commerce based closed-loop supply chain for plastic recycling." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127105.

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Thesis: M. Eng. in Supply Chain Management, Massachusetts Institute of Technology, Supply Chain Management Program, May, 2020
Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 73-77).
The world is facing a grave plastic waste problem. It is not new that we hear about oceanic death and morbid landfills. Only 8% of all the plastic produced is recycled in the US. This grotesque situation has been worsened by the Chinese ban of plastic waste imports from the developed western nations as of 2018. In this research we assess the feasibility of a novel approach to using existing e-commerce reverse logistics channels to take back post-consumer plastic. We use product sales data to estimate the post-consumer plastic volume. We then, design a mixed integer linear programming (MILP) based optimization model to assess different take-back routes and calculate various operational costs. In addition to the optimization model we determine the feasibility of this process by considering cost offsets such as price of virgin plastics. After that, we conduct a scenario-based sensitivity analysis to understand systemic cost and overall profit. We used the results of these analyses to formulate the strategic recommendations for companies interested in promoting or implementing e-commerce-based recycling programs. Finally, we assess the greenhouse gas emissions and corresponding externality costs through this process and perform a qualitative assessment of the stakeholder networks vital to making such a system operational. In conclusion, our results suggest that in certain scenarios it is economically feasible to facilitate a take-back process for post-consumer plastic using existing e-commerce-based reverse logistics channels while maintaining minimal additional emissions in the process.
by Saikat Banerjee.
M. Eng. in Supply Chain Management
M.Eng.inSupplyChainManagement Massachusetts Institute of Technology, Supply Chain Management Program

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Kayser, Justus [Verfasser]. "Leistungsanalyse in der Closed Loop Supply Chain : Eine Simulationsstudie / Justus Kayser." Baden-Baden : Nomos Verlagsgesellschaft mbH & Co. KG, 2016. http://d-nb.info/1122048637/34.

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Seitz, Margarete Anna. "Closed-loop supply chain management and remanufacturing in the automotive sector." Thesis, Cardiff University, 2005. http://orca.cf.ac.uk/55426/.

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The results of this research make three distinct contributions. The first contribution refers to the immediate body of knowledge on closed-loop supply chain management. The thesis reviews existing closed-loop supply chain and remanufacturing structures and creates, through the application of the research findings, new and more appropriate structures for the automotive sector. Secondly, the findings contribute to the development of a theory for closed-loop supply chain management. They demonstrate that theories from related fields cannot sufficiently explain why corporations engage in product recovery activities. This thesis therefore develops a rational for closed-loop supply chain management and remanufacturing in the automotive sector. The third contribution is made with regard to methodology. Research in closed-loop supply chain management has been largely dominated by quantitative contributions. This thesis therefore adds to methodology by taking an interdisciplinary perspective and by applying a unique combination of methodological considerations to investigate the specific research problem.

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Fredriksson, Stina, and Olivia Helm. "Skapa förutsättningar för closed-loop supply chain : För detaljhandelsföretag i modebranschen." Thesis, Högskolan i Skövde, Institutionen för handel och företagande, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-15186.

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Bakgrund På grund av den enorma konsumtion av textilier och kläder som sker i vissa delar av världen krävs ett förändrat förhållningssätt till hur de textilier och kläder som köps hanteras både under och efter användande. En stor påverkan har även de företag som designar, tillverkar och säljer produkterna. För att minska användandet av ändliga resurser krävs en strategi som förändrar dagens linjära flöden till ett slutet kretslopp där resurser används på nytt, om och om igen, en så kallad Closed-loop supply chain. Studiens syfte är att undersöka hur fyra svenska detaljhandelsföretag inom modebranschen arbetar med just Closed-loop supply chain och dess möjligheter och utmaningar med konceptet. Syftet är även att se hur företagen arbetar med återvinning och hållbarhet som är relevanta delar i ett fungerande cirkulärt flöde. Genomförande Den teoretiska referensramen beskriver konceptet Closed-loop supply chain och de delar som innefattas, framåtriktad och omvänd försörjningskedja. Den tar även upp sju processteg som måste hanteras för att skapa en Closed-loop supply chain för kläder och textilier. För att undersöka hur de fyra svenska detaljhandelsföretagen inom modebranschen arbetar för att uppnå ett cirkulärt flöde har en grundlig genomgång av respektive företags hållbarhetsrapporter gjorts. I empiriavsnittet presenteras förutom de fyra svenska detaljhandelsföretagen även ett antal organisationer som på något vis arbetar för att möjliggöra ett cirkulärt flöde inom textil- och modebranschen. För att få en bild av konsumenternas kännedom och attityd till återvinningsmöjligheter genomfördes även en enkätundersökning. Resultat För att skapa rätt förutsättningar för att skapa en Closed-loop supply chain krävs det att både den framåtriktade och den omvända försörjningskedjan är anpassad till det. Den framåtriktade försörjningskedjan kräver att klädesplaggen är designade för att enkelt kunna återvinnas och att de av konsumenten är hanterade på ett så hållbart sätt som möjligt. Den omvända försörjningskedjan kräver först och främst att kläderna samlas in. Vidare krävs att de insamlade kläderna sedan skickas vidare för sortering och därefter ta ett beslut om ett lämpligt återanvändningsalternativ. Slutligen omdistribueras produkten för att antingen återföras in i något processteg i den framåtriktade försörjningskedjan eller säljas på en andrahandsmarknad. Av den information som framkommit ur hållbarhetsrapporter och övrig informationsinsamling har det kunnat konstaterats att detaljhandelsföretagen har en lång väg att gå till dess att en Closed-loop supply chain fungerar till 100 %.
Background Due to the enormous consumption of textiles and clothing that takes place in some parts of the world, a changed approach is needed to handle the textiles and clothing that are purchased both during and after use. The companies that design, manufacture and sell the products also have a big impact. In order to reduce the use of finite resources, a strategy that changes today's linear flows into a closed cycle, where resources are recycled, a so-called Closed-loop supply chain, is required. The purpose of the study is to investigate how four Swedish retailers in the fashion industry work with Closed-loop supply chain and the possibilities and challenges with the concept. The purpose is also to find out how companies work with recycling and sustainability that are relevant parts of a functioning circular flow Implementation The theoretical reference framework describes the Closed-loop supply chain concept and the components that are included; forward and reverse supply chain. It also takes up seven process steps that must be handled to create a Closed-loop supply chain for clothes and textiles.To investigate how the four Swedish retail companies in the fashion industry work to achieve a circular flow, a profound review of the respective company's sustainability reports has been made. In the empirical section, apart from the four Swedish retail companies, there are also a number of organizations that in one way or another work to allow circular flow in the textile and fashion industry. In order to get a reflection of consumers' awareness and attitude towards recycling opportunities, a survey was also conducted. Results In order to create the right conditions for a Closed-loop supply chain, it is necessary to adapt both the forward and the reverse supply chain. The forward supply chain requires that the garments are designed to be easily recycled and that they are handled by the consumer in a sustainable way. The reverse supply chain primarily requires that the clothes are collected. Furthermore, the collected clothes are forwarded for sorting and then a decision of the garments reuse options has to be taken. Finally, the product is redistributed either back into any process in the forward supply chain or sold in a secondary market. From the information obtained from the sustainability reports and other information gathering, it has been found that retail companies have a long way to go until a Closed-loop supply chain operates to 100%.

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Klintner, Saga, and Julia Vinberg. "Hur en extern insamlingsaktör, Myrorna, möjliggör Lindex closed loop supply chain." Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96730.

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Title: How an external collection actor enables Lindex’s closed loop supply chain. Context: Customers demand of sustainable products has motivated companies to develop more sustainable business models. The implementation of closed loop supply chain is an effort to keep the value of resources for as long as possible, by reusing and recycling consumer waste. This study identifies what a reverse logistics flow of textile material looks like in a closed loop supply chain, and how companies can gain economies of scale in their reverse logistics. Purpose: The purpose of the study is to investigate how a collection actor handles collected textiles and thereby contributes to the enabling of Lindex’s closed loop supply chain. The identification of the process provides an example of how other organizations can approach the circular economy. The study will also explore various alternatives to achieve economies of scale in the reverse logistics. Questions at issue: 1. “How does an external collection actor, Myrorna, manage Lindex´s reverse logistics of textiles in a closed loop supply chain?” 2. “With what strategies can the external collection actor, Myrorna, achieve economies of scale?” Method: The study practices a qualitative hermeneutic orientation, with an inductive reasoning. It is a one case study where the empirical information was collected by qualitative semi-structured interviews. The sampling technique used to provide the data was purposive sampling. Process mapping through process flow chart was used to analyze the empirical information. The study reaches a certain amount of validity through the use of triangulation of facts. Other ways used to ensure the quality of the study was for example that the respondent reviewed the results to authenticate it. An aspect of criticism is that the study is a one case study and therefor has a lower grade of transferability. The authors have also taken research ethics into consideration. Results: The external collection actor, Myrorna, enables Lindex closed loop supply chain through the physical handling of the collected textiles. According to the head of collection at Myrorna (2020-05-12) the reverse logistics is currently well managed. The study finds supporting evidence for the case, however alternative means of achieving economies of scale are proposed. One proposition is to outsource the domestic transportation through a third party logistics company. Another is to include pickup of goods at Lindex stores to Myrornas iv current pickup routes or to use a third party logistics company. Myrorna already handles a lot of textiles in their sorting operation, and the authors therefore suggests that they will keep insourcing this part of the reverse logistics. As a final suggestion Myrorna should continue outsourcing the export of leftover textiles in order to achieve economies of scale. Keywords: Supply chain management, Sustainable fashion industry, Closed loop supply chain, Process flowchart, Reverse logistics, Textile collection, Economies of scale.

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Norberg, Filip, and Niklas Carlsson. "Closed-loop supply chain : En studie av svenska detaljhandelsföretag inom modebranschen." Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-67437.

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Den globala uppvärmningen anses idag vara ett av de största hoten mot vår planet. Vi människor är en stor bidragande orsak, efter årtionden av ständigt ökande utsläpp och gränslös konsumtion. Åtgärder måste genomföras inom samtliga sektorer i vårt samhälle. En av dessa sektorer är textilindustrin som årligen producerar mängder med nya produkter för att täcka kunders behov av ständig förnyelse. Som ett steg bort från det linjära slit-och-släng-samhället har företag börjat implementera cirkulära försörjningskedjor, s.k. closed-loop supply chains (CLSC). Denna studie undersöker hur svenska detaljhandelsföretag inom modebranschen arbetar med CLSC för att minska sin klimatpåverkan men även för att skaffa sig konkurrensfördelar. Detta görs genom en teorigenomgång som ligger till grund för en empirisk studie av fyra företag, där två av företagen studeras djupgående genom intervjuer med representanter från företagen. De två andra företagen har studerats på grundare nivå genom granskning av företagens hållbarhetsredovisning och hemsidor. Författarna undersöker även vilka drivkrafter och hot som företag ser med CLSC.

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Lee, Chanjoo. "Analysis of decision-making in closed-loop supply chains." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44925.

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Closed-loop supply chains (CLSCs) that integrate the activities for reclaiming residual values in postconsumer products with the traditional forward supply chain activities are important from financial and environmental perspectives. This thesis develops models and analyses on three topics novel to the field of CLSC research with a goal of advancing knowledge about effective decision-makings in CLSCs. In the first part of the thesis, we study joint control of stochastic forward and stochastic reverse material flows in CLSCs. With an application to a CLSC where postconsumer products are collected for warranty service purposes, we demonstrate that the benefit of coordinating two production activities could be significant. We develop a model that can be used to obtain an effective inventory control policy for coordinating forward and reverse material flows. Through Monte Carlo simulation and global sensitivity analysis, we identify major influential factors that affect system's warranty cost savings performance. The results indicate that joint control of forward and reverse material flows greatly improves warranty cost savings performance as well as system's robustness to uncertainties. The second part of the thesis develops a differential game model for characterizing decentralized time-varying competitive decision-making in a CLSC. The differential game model is particularly useful for studying time-varying interactive decision-making in CLSCs that involve many stakeholders who pursue different objectives in forward and reverse production activities. We identify optimal prices and production strategies that evolve over time under fluctuating market demand. Also, the model provides a quantitative scheme that can be used to obtain an efficient apportionment of product recovery processes. The third part of the thesis describes the relationship among consumers' risk-aversion, product cannibalization of new products by remanufactured products, and growth of CLSCs through price optimization models. Whereas price is one of the most effective variables for managing market demand, previous CLSC research has mainly focused on operational problems without paying much attention on the interface between CLSCs and markets. We develop models that jointly determine optimal prices in forward and reverse channels considering consumers' willingness-to-pay (WTP) for remanufactured products, consumers' willingness-to-accept (WTA) for a buyback price, and consumers' risk aversion to uncertain quality perceptions. The results show that consumers' active participation in CLSC is an important factor for the viability and growth of a CLSC. Also, we show that companies can benefit from product remanufacturing although it may be accompanied by production cannibalization.

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Schröter, Marcus. "Strategisches Ersatzteilmanagement in Closed-Loop Supply Chains : ein systemdynamischer Ansatz /." Wiesbaden : Dt. Univ.-Verl, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014957630&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Witek, Carolin. "Dynamische Produktionsprogrammplanung in Closed Loop Supply Chains mit aktivem Rückflussmanagement." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-226631.

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Durch immer knapper werdende Ressourcen, steigendes ökologisches Bewusstsein der Konsumenten und nicht zuletzt gesetzlichen Vorgaben sind produzierende Unternehmen über den gesamten Lebenszyklus ihrer Produkte für diese verantwortlich. Dies gilt im Besonderen für Hersteller elektronischer Produkte. Stetige Innovationen und kurze Nutzungszyklen führen dazu, dass noch funktionierende Geräte ungenutzt in den Haushalten lagern oder im Restmüll entsorgt werden. Mit der WEEE-Richtlinie verpflichtete die EU 2003 die Hersteller elektronischer Produkte dazu, nachhaltiger zu produzieren, Ressourcen effizienter zu nutzen, die Schadstoffbelastung und allgemein das durch die elektrischen Geräte induzierte Müllaufkommen zu reduzieren. Mit der Aufgabe diese Ziele zu erreichen, stellen sich die Hersteller somit einer großen Herausforderung. Auf der einen Seite steigt der Druck des Wettbewerbs, die Konsumenten werden zunehmend kritischer und die Rohstoffkosten steigen. Auf der anderen Seite müssen sie eine adäquate Verwertung ihrer Altprodukte finden und deren Rückführung sicherstellen. Dabei sind sie maßgeblich abhängig von der Entscheidung der Konsumenten. Diese können das Produkt kostenfrei entsorgen, jedoch fehlt es ihnen häufig an entsprechenden Anreizen. Diese Dissertation klärt daher u.a. folgende Forschungsfragen: Welche Möglichkeiten gibt es, die Vorgaben des Gesetzgebers (WEEE) profitabel umzusetzen und wie kann der Konsument in die Planung einer Closed Loop Supply Chain (CLSC) einbezogen werden. Zudem diskutiert sie die Optionen die Handlungen der Konsumenten aktiv zu beeinflussen. Mit Hilfe der spieltheoretischen Modellierung wird ein komplexes dynamisches Modell entwickelt, welches sowohl für den Hersteller als auch für die Endkunden elektronischer Produkte die bestmögliche Lösung vorschlägt. Mit dem entwickelten Modell ist es den Herstellern möglich, ein optimales Produktionsprogramm für mehrere Perioden unter Beachtung einer optimalen Rücknahmestrategie aufzustellen.

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Kobor, Hans P. "Closed loop supply chain waste reduction through predictive modelling and process analysis." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122573.

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Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, 2019, In conjunction with the Leaders for Global Operations Program at MIT
Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019, In conjunction with the Leaders for Global Operations Program at MIT
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 59-60).
Verizon distributes Customer Premises Equipment (CPE) such as set top boxes, broadband routers, and WiFi extenders to Fios customers via a variety of paths; for example: direct ship to customer (either for self-install or for later installation by a field technician), delivery via field technicians, or retail store pickup (primarily for self-install). Each method has its own benefits and shortcomings due to impacts on metrics such as inventory levels, shipping costs, on-time delivery, and system complexity. Although the majority of shipments are successfully activated in the customer's home, a non-trivial percentage results in unused returns or inventory shrinkage. These undesirable results represent a significant amount of wasted resources. This thesis is focused on identifying and realizing cost savings in the Fios supply chain through reduction in waste associated with unsuccessful shipments.
In order to effectively analyze the closed-loop supply chain, accurate and reliable process mapping is critical. Interviews with key stakeholders, together with order and shipment data analysis yielded a complete picture of the ecosystem's processes and infrastructure. Process mining techniques augmented this understanding, using event log data to identify and map equipment and information flows across the supply chain. All together this analysis is used to identify order cancellations as a key source of waste. To limit waste, it is necessary to conduct analysis both internal to Verizon's processes and externally, to determine if there are customer trends leading to order termination. Process mining was used for the internal analysis and, while it helped identify singular cases in which process abnormalities were associated with undesirable outcomes, its current form proved unsuited for root cause analysis.
Internal analysis did, however, illuminate opportunities for improvement in radio-frequency identification (RFID) usage and protocols across the supply chain. Current systems can result in poor visibility of equipment as it moves within some segments of the supply chain. The actual monetary impact is difficult to determine but likely to increase as the importance of RFID increases. External analysis is conducted through predictive modelling. Using a variety of data sources, a model with over 80% sensitivity and a low false positive rate is achieved. Operationalizing this model through real time incorporation with sales was explored but found to be overly complex. Instead, the random forest model yielded policy changes guided by the features with the highest importance. A pilot is currently in development to test the efficacy of suggested changes, as the model implies significant savings opportunity.
by Hans P. Kobor.
M.B.A.
S.M.
M.B.A. Massachusetts Institute of Technology, Sloan School of Management
S.M. Massachusetts Institute of Technology, Department of Mechanical Engineering

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Valenzuela, Karla B. "A study of closed-loop supply chain models with governmental incentives and fees." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3389153.

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[Verfasser], Orapadee Joochim. "Dynamic multi-commodity capacitated facility location in closed-loop supply chain design / Orapadee Joochim." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover (TIB), 2012. http://d-nb.info/1028012640/34.

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Hammond, David. "Closed-loop supply chain equilibrium, legislation and the rebound effect : a variational inequality approach." Thesis, University of Portsmouth, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.478914.

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Dahl, Thor Lobekk, Yichang Lu, and Sidney Carina Thill. "Sustainability of Construction and Demolition Waste : A Closed-loop Supply Chain for Flat Glass." Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-104631.

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Purpose: This thesis’ purpose is to identify a CLSC model of flat glass, including actors,waste sources, and what can be done with recycled flat glass. In addition, this researchaims to propose a cost structure of a flat glass CLSC. Thus, this thesis’ research questions(RQ) are: RQ1: How can closed-loop supply chains (CLSC) for the purpose of flat glasslook like? RQ1.A: What actors are a part of a flat glass CLSC? RQ1.B: What are thewaste sources of flat glass in a flat glass CLSC? RQ1.C: What are the uses of flat glassas secondary material? RQ2: How can a cost structure for a closed-loop supply chain(CLSC) for the purpose of flat glass look like? Method: For this purpose of this thesis the researchers chose to employ a pragmatistresearch philosophy. The thesis is an exploratory qualitative study using an abductiveapproach. A case study strategy was used, and data was collected through semi-structuredinterviews and a literature review. Seven interviews were conducted with the six casecompanies. Findings: A flat glass CLSC consists of three phases: manufacture, use, and secondary(raw) material. The main actors are float glass manufacturer, flat glass processor/refiner,flat glass distributor, construction and demolition company, flat glass recycler, and freighthauler. Sub-actors of a flat glass CLSC are raw materials supplier, government, thirdparty contractors, container glass manufacturer, and glass wool manufacturer. Secondarymaterial occurs during flat glass manufacturing, distribution/transport, construction, anddemolition. It can be divided into three types, i.e., pure, high quality cut-offs,contaminated flat glass, and end-of-use flat glass. The possible uses of flat glass assecondary material are float glass, container glass, and glass wool manufacturing. Thecost structure for a flat glass CLSC divides cost elements into the three phases of a flatglass CLSC and six supply chain cost categories, which include manufacturing cost,distribution cost, warehousing cost, administration cost, capital cost, and installation cost. Theoretical Implications: This master’s thesis helps in adding to two research areas: flatglass and CLSC. By reviewing existing literature and conducting the case studies inChina, Germany, and Norway, the researchers can reflect the current practices of flat glassCLSCs in different countries, thereby adding to existing scientific research to close theresearch gap of flat glass CLSCs. Practical Implications: This master’s thesis contributes to practice by providing a flatglass CLSC model and cost structure which can be used as a starting point of developinga flat glass CLSC and its cost structure. In addition, this thesis is connected to anotherbigger research project in collaboration with the Linnaeus University and the city ofVäxjö, the findings from this thesis are beneficial for improving the situation of flat glassin Sweden. Societal Implications: By researching circularity in CDW, this master’s thesis helps notonly the city of Växjö but also other Swedish cities to improve the situation of flat glassand strive towards a full circular economy, further contributing to an increase insustainability in Sweden.

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Girot, Lola, and Claudia Kopf. "Creating a closed-loop supply chain model and evaluating it through a business case for sustainability." Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-74899.

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Purpose The purpose of this thesis is to set up a closed-loop supply chain model for B2C online subscription box retailers and to develop a business case evaluating the model’s sustainability. Method This explorative thesis has an abductive research approach. Multiple-case studies are conducted and data from four cases and an expert are collected by conducting interviews. The research contains both qualitative and quantitative data. Findings A closed-loop SC model is created with regards to transport packaging. The model suggests that once the package is received by the consumer it can be returned in an empty state. After being cleaned it should be reused by the 3PL. The model’s sustainability is evaluated by developing a business case. Sustainable performance measures with regards to economic, social and environmental practice are assembled. The model enhances general social performance and environmental performance. Economic performance is mostly positively influenced. Options for cost savings in order to improve the economic performance of the model are suggested by the researchers. Practical implications The work provides businesses within the online B2C subscription box retail with a model for a possible closed-loop supply chain with regards to transport packaging. The business case for sustainability can be applied as a guideline to evaluate the model or similar ones. Researchers give suggestions on adapting packaging to enhance economic performance. Societal implications This thesis points out possible environmental and social benefits that may be achieved by a closedloop supply chain model. Besides waste and emission reduction, social performance such as employee motivation is positively influenced. Theoretical implications The thesis provides a model developed from theory and empirical data. The model does not only have practical implementations but also complements theory where a gap has earlier been identified. Through the business case for sustainability researchers contribute to theory since literature is scarce.

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Vasavada, Amit. "Value of information in a closed loop supply chain in presence of unreliable suppliers for new product /." Diss., Online access via UMI:, 2009.

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Thesis (M.S.)--State University of New York at Binghamton, Thomas J. Watson School of Engineering and Applied Science, Department of Systems Science and Industrial Engineering, 2009.
Includes bibliographical references.

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Akbar, Ghanadian Sara. "A Framework Based on Social Network Analysis (SNA) to Evaluate Facilities and Alternative Network Designs for Closed Loop Supply Chains." Ohio University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1596583638602018.

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Sun, Siying. "Inventory Management in Reverse Logistics in FAW Co., Ltd." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-21619.

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Recycling and remanufacturing returned goods are economically beneficial for companies since the cost of obtaining used parts is lower in many cases and selling price is close to that of a new product. This leads to decreased costs and thereby increased profits for the company. In addition, there are also great environmental benefits by keeping the structural integrity of a part; the energy used for disassembly and refurbishing is much lower than the energy required for raw material extraction and machining. Encompassing the returned goods makes the supply chain to closed loop supply chain, which is different from the traditional supply chain due to reverse logistics. A reverse flow of material is however usually more complex than a forward flow of parts and components from suppliers. This means that inventory management becomes critical and needs to be viewed from a new perspective. The purpose of the report is to study FAW Co., Ltd’s inventory situation in reverse logistics. The report analysed the inventory management in the company, specifically focusing on one product as the instance Motor Engine LFTS-2000since it is in the maturity stage of product life cycle. Two scenarios were designed to consider how different parameters affect inventory levels in reverse logistics. The report analysed how different parameters affect the inventory levels and minimum cost. With the increasing returned goods are processed, inventory levels and minimum cost will decrease correspondingly.

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Holm, Elin, and Sara Minolf. "Textilbranschens strävan efter cirkularitet : En flerfallsstudie av svenskatextilföretag." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10297.

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Idag slängs en stor del av konsumenters använda textilprodukter i soptunnan för att sedan deponeras i stora sopområden, så kallade landfills. Vad många inte känner till är att en stor del av det som slängs egentligen går att återanvända. Genom att ta vara på nyttjade produkter kan företag minska användningen av råmaterial i produktion för att på sikt uppnå en sluten produktlivscykel. Syftet med den här uppsatsen är att, med hjälp av en kvalitativ ansats, undersöka hur textilföretag arbetar med att erhålla nyttjade produkter från konsumenten och återföra de tillbaka in i företaget. Genom att studera tidigare forskning inom området har vi identifierat fem nyckelprocesser i produktens väg från konsumenten tillbaka till företaget. Processerna är följande: Produktinsamling, Returlogistik, Sortering och disponering, Återanvändningsalternativ samt Omdistribution, vilka dessutom är de huvudområden som presenteras i den teoretiska referensramen. Den teoretiska referensramen mynnar ut i en syntesmodell som framtagits för att utföra en jämförande analys av empirin. Rapportens empiri har samlats in genom semi-strukturerade intervjuer. Resultatet av insamlad empiri från intervjuer bör bidra till ett mer uppdaterat synsätt på vilka utmaningar som textila företag, som har implementerat en Closed-loop Supply Chain, står inför. Förhoppningsvis kommer resultatet att frambringa lösningar för textilföretag som önskar förlänga eller stänga sina produktlivscykler. Studien granskar tre svenska textilföretag som idag har implementerat insamlingssystem, antingen internt eller via en tredjepartsorganisation. Det återanvändningsalternativ som används är främst återanvändning men till viss del även återvinning. Studien identifierar att ett problem som försvårar att stänga produktlivscykeln är att motivera konsumenten till att återlämna sina nyttjade plagg istället för att slänga dem. Textilföretagen ser även en svårighet med att få tillgång till teknik som möjliggör materialåtervinning. Ytterligare en aspekt som försvårar återvinningsprocessen är att textilbranschen idag ofta använder sig av heterogena material med fiberblandningar vilket gör det svårt att avgöra textiliernas materialinnehåll. Slutligen visar studien att avsaknaden av miljölagstiftning och direktiv inom textilbranschen leder till att det är svårt att definiera vad Closed-loop Supply Chain är, vilket försvårar hanteringen av textilavfall.

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Tanai, Yertai. "Capturing value from decentralized supply chain with third party reverse logistics." Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1478561470801379.

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Metta, Haritha. "A MULTI-STAGE DECISION SUPPORT MODEL FOR COORDINATED SUSTAINABLE PRODUCT AND SUPPLY CHAIN DESIGN." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_diss/137.

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In this research, a decision support model for coordinating sustainable product and supply chain design decisions is developed using a multi-stage hierarchical approach. The model evaluates alternate product designs and their corresponding supply chain configurations to identify the best product design and the corresponding supply chain configuration that maximizes the economic, environmental and societal benefits. The model considers a total life-cycle approach and incorporates closed-loop flow among multiple product lifecycles. In the first stage, a mixed integer linear programming model is developed to select for each product design an optimal supply chain configuration that maximizes the profit. In the subsequent stages, the economic, environmental and societal multiple life-cycle analysis models are developed which assess the economic, environment and the societal performance of each product design and its optimal supply chain configuration to identify the best product design with highest sustainability benefits. The decision support model is applied for an example problem to illustrate the procedure for identifying the best sustainable design. Later, the model is applied for a real-time refrigerator case to identify the best refrigerator design that maximizes economic, environmental and societal benefits. Further, sensitivity analysis is performed on the optimization model to study the closed-loop supply chain behavior under various situations. The results indicated that both product and supply chain design criteria significantly influence the performance of the supply chain. The results provided insights into closed-loop supply chain models and their behavior under various situations. Decision support models such as above can help a company identify the best designs that bring highest sustainability benefits, can provide a manager with holistic view and the impact of their design decisions on the supply chain performance and also provide areas for improvement.

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Wei, Shuoguo. "Core Acquisition Management in Remanufacturing : Current Status and Modeling Techniques." Doctoral thesis, Linköpings universitet, Produktionsekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-113251.

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Remanufacturing is an important product recovery option that benefits our sustainable development. Cores, i.e. the used products/parts, are essential resources for remanufacturing. Without cores, there will not be any remanufactured products. Challenges in the core acquisition process are mainly caused by the uncertainties of: return volume, timing and core quality. Core Acquisition Management actively attempts to reduce these uncertainties and achieve a better balance of demand and return for the remanufacturers. The aim of this dissertation is to extend the knowledge of Core Acquisition Management in remanufacturing, by investigating the current status of research and industrial practice, and developing quantitative models that assist the decision making in the core acquisition process. In the dissertation, a literature review is firstly conducted to provide an overview about the current research in Core Acquisition Management. Possible further research interests, for example, more studies based on non-hybrid remanufacturing systems and imperfect substitution assumption are suggested. Through an industrial survey carried out in a fast developing remanufacturing market - China, environmental responsibility and ethical concerns, customer orientation and strategic advantage are identified as the most important motives for the remanufacturers, while customer recognition is their most serious barrier at present. Suggestions for further improving the Chinese remanufacturing industry from the policy-makers’ perspective are provided. After the above investigation, mathematical models are then developed to assist the acquisition decisions in two aspects: to deal with the uncertainties of return volume and timing, and to deal with the uncertainties of core quality. Acquisition decision about volume and timing is firstly studied from a product life cycle perspective, where the demands for remanufactured products and the core availability change over time. According to industrial observations, the remanufacturing cost decreases with respect to its core inventory. Using optimal control theory, core acquisition and remanufacturing decisions are derived to maximize the remanufacturer's profit. It is found that besides a simple bang-bang type control policy (either collecting as much as possible, or nothing), a special form of synchronizing policy (adjusting the core collection rate with demand rate) also exists. Furthermore, the acquisition decision depends greatly on the valuation of cores, and Real Option Valuation approaches are later used to capture the value of flexibility provided by owning cores when different aspects of remanufacturing environment are random. More specifically, the value of disposing a core earlier is investigated when the price of remanufactured product is uncertain, and the impact of the correlation between stochastic demand and return is also studied. To deal with the uncertainties of core quality, refund policies with different numbers of quality classes are studied. Under the assumption of uniformly distributed quality, analytical solutions for these refund policies are derived. Numerical examples indicate that the customers’ valuation of cores is an important factor influencing the return rates and the remanufacturer’s profit. Refund policies with a small number of quality classes could already bring major advantages. Credit refund policies (without deposits) are included for comparisons. In addition, within a game theory framework, the trade-off of two types of errors of the quality inspection in a deposit-refund policy is studied. The salvage values of different cores show great influences on the remanufacturer’s policy choices. The value of information transparency about the inspection errors are studied under different conditions. Interestingly, the customer may actually return more low quality cores when the inspection accuracy is improved.

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WILLÉN, MATHILDA, and SIMON RONNEDAL. "The Effects of Reconstructing from an Open- to a Closed Loop Supply Chain : A Case Study of a Large Process Industry Organisation." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-300520.

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In a world with finite resources, there is a global push for sustainable development and circular economy models. One way the process industry may promote circularity is by investigating the feasibility of re-collecting their, or similar, end-of-life products from the market. This thesis investigates this strategy in the context of collaborating with a supplier of the end-of-life products. Thus, the following main research question derived; How could a process industry organisation, through supply chain integration with an external supplier, pursue a closed-loop value chain instead of an open-loop? The focus is on assessing operational aspects of the supply chain that needs restructuring for integrating a joint flow between an organisation and its supplier. These operational aspects and their effects on costs are accounted for in this thesis. To answer the research question, an exploratory case study with primary data collection of interviews at two organisations are carried out, and literature reviewed on the matter, which yielded insights on the matter for a practitioner’s view. The thesis concludes that the capabilities and capacities of the external supplier set critical frames for the supply chain integration. Where the capacity in terms of quality, timing and quantity of the supplier, dictates what volume the supplier could deliver to the case company, which indirectly decides what scale the project could reach. The conclusions highlight five key conditioning procedures of the end-of-life product that needs to be secured in order for the case company to be able to accept them into their current processes; sorting, traceability, cleaning, collecting and storing. These requirements for conditioning processes set a comprehensive impact on the cost image of the restructuring, but is regarded as necessary to meet the requirements expressed by the case company. The results show that stricter tolerance levels calls for higher operational costs, and hence it is recommended to elaborate on the possibilities of easing technical requirements. The more accepting a process industry organisation could be for tolerance levels on end-of-life products, the less pressure is set on the supplier for engaging resources in conditioning activities, thus this aspect has a direct correlation to the cost image.
I en värld med ändliga resurser finns en global drivkraft att sträva efter hållbar utveckling och cirkuläritet i affärsmodellen. Ett sätt processindustrier kan främja cirkuläritet är genom att undersöka möjligheten att samla upp sina, eller andras, uttjänta produkter för att ta tillvara på dess värde. Denna uppsats behandlar strategin i kontexten där en processindustri samarbetar med en utvald extern leverantör för att uppnå detta reverserade flöde. Ur detta fokus formulerades följande huvud-forskningsfråga; Hur kan en organisation inom processindustrin, genom att integrera leverantörskedja med en extern leverantör, eftersträva en stängd- istället för en öppen cirkulär värdekedja? Vidare är uppsatsens fokus att fastställa vilka aspekter i försörjningskedjan som kan komma att behövas rekonstrueras för att integrera dessa två kedjor, samt vad detta bidrar för ekonomisk påverkan på integrationen av försörjningskedjan. För att svara på forskningsfrågan skedde en explorativ fallstudie med primär datainsamling i form av intervjuer hos två organisationer, och en granskning av litteraturen tillhörande aktuellt området. Detta genererade värdefulla insikter sett från ett praktiskt perspektiv. Uppsatsen landar i slutsatserna att färdigheterna och kapaciteten hos den externa leverantören är avgörande för hur försörjningskedjorna ska kunna integreras. Kapaciteten är mätt i termer av kvalité, tajming och kvantitet hos leverantören, tre aspekter som dikterar den potentiella volym som kan levereras till fall-företaget och därmed den potentiella skalan av projektet. Uppsatsen belyser vidare fem nyckelprocesser som krävs för att säkerställa skicket av den uttjänta produkten, för att fall-företaget ska kunna acceptera produkten som ingångsmaterial i sina processer. Dessa är sortering, spårbarhet, rengöring, uppsamling och förvaring. De påverkar kostnadsbilden av projektet och visar till exempel att ju striktare toleransnivåer fall-företaget har på den uttjänta produkten, desto högre krav ställs på operativa processer hos leverantören för att leverera inom de efterfrågade toleransramarna. Detta utmynnar i slutsatsen att ju mer fall-företaget kan lätta på sina tekniska toleranser, desto mer flexibilitet kan leverantören ha vid den interna konditioneringen av den uttjänta produkten, ett samband som har en direkt korrelation till kostnadsbilden av projektet.

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Johansson, Gustav, and Duberg Johan Vogt. "Economic Potential for Remanufacturing of Robotic Lawn Mowers with an Existent Forward Supply Chain : A case study on Husqvarna." Thesis, Linköpings universitet, Produktionsekonomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-157620.

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This project investigates how remanufacturing of robotic lawn mowers can be incorporated into an existent forward supply chain. The project is conducted as a single case study on Husqvarna where an interview study and a literature study provide the empirical data and theory, respectively. Alternatives are proposed for potential remanufacturing cases at various locations, where different parties ranging from original equipment manufacturers to independent manufacturers perform the remanufacturing process. SWOT analyses are conducted to identify the most promising alternatives for a further economic analysis. The economic evaluation is based on net present values and a sensitivity analysis which together determines the feasibility of the alternatives. The results of the project answer three research questions. The first concludes that out of seven defined production systems there are only two that are not suitable for remanufacturing in a general case mainly due to the low flexibility of these systems. The results of the second identifies labor, logistics, and operational prerequisite factors that must be considered when implementing remanufacturing for case specific alternatives. The conclusion of the third research question lists the feasibility of the alternatives from which the recommendations for Husqvarna are presented. This project recommends Husqvarna to implement a remanufacturing process for their robotic lawn mowers either by enlisting their current dealers or by themselves at a location nearby the spare parts warehouse in Torsvik. Which alternative is the most profitable depends mainly on the expected quantity of the acquired cores, i.e. Husqvarna as a centralized remanufacturer benefits more from higher quantities while the decentralized dealer alternative would comparably be more profitable if the quantities were lower. As it is perceived that initial collected quantities will be low, and possibly even somewhat higher for the dealers, a decentralized remanufacturing process could be the most profitable alternative to start with. Using a third-party remanufacturer is also feasible but considered risky and therefore not recommended as they could have the same core acquisition problem as Husqvarna while having lower profitability.

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Mazahir, Muhammad Shumail. "Three essays on the effects of environmental regulations on supply chain practices." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLH008/document.

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Cette thèse est consacrée à l'étude des législations environnementales et leurs effets sur la chaîne d'approvisionnement. Plus précisément, nous nous intéressons à la législation basée sur le recyclage du produit mais aussi sur les normes de conformité (ROHS). Nous étudions le potentiel de réutilisation ainsi que les aspects environnementaux et économiques de différents systèmes de législation. La solution se présente sous forme d'une combinaison de politiques de récupération qui mène à de meilleurs résultats sur le plan écologique ainsi que sur le plan économique.Dans la deuxième partie de la thèse, Nous étudions la performance comparative des régimes à base sur la législation de récupération avec des problématiques d'innovation et de conception de produits. La politique de réutilisation des produits peut aggraver l’environnement si le cadre de la régulation n'est pas bien défini. Dans la dernière partie, une étude est menée sur le choix des produits dans une chaine d’approvisionnement avec des législations basées sur la récupération et sur la conformité des produits. Nous intégrons les effets de l'incertitude associée à la demande du marché et les paramètres de coût de récupération. Une méthode d'optimisation robuste pour la sélection et distribution des produits est présentée
Climate change and global temperature rise has made environmental legislations a focal point of discussion. This dissertation is devoted to the study of environmental legislations and their effect on supply chain practices. More precisely, our center of interest is the product recovery based legislation along with compliance based regulations. We explore the reuse potential and the environmental and economical aspects of different product recovery based legislation schemes by modeling a stackelberg game between a social welfare maximizing policy maker and a profit maximizing monopolistic firm and find that a combination of existing recovery policies i.e., a recovery target in combination with incentive structure such as taxation/subsidy may lead to better outcomesnot only from environmental perspective but also from economical aspects. In Chapter 2, we extend the discussion comparative performance of the recovery legislation based schemes in presence of innovation and product design issues and show how unintended environmental outcomes may appear if the policy framework is not adequately designed. In Chapter 3, wecapture the effect of recovery legislation and compliance based legislation on product selection when a firm serves a number of markets. We incorporate the effects of uncertainty associated with market demands and recovery cost parameters and present a robust optimization based method for product selection and allocation decisions

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Vasil, Timothy J. (Timothy James). "Forward thinking in reverse : design, implementation, and continuous monitoring of a closed-loop supply chain using optimization, simulation, and dashboard systems to maximize net recovery." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/66044.

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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; in conjunction with the Leaders for Global Operations Program at MIT, 2011.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 197-199).
Developed during our recent six-month engagement at Dell-a leading computer manufacturer and services provider with one of the world's leading supply chains--we discuss a network flow-based mixed-integer linear program (MILP) model to identify the critical factors in optimizing reverse supply chain design decisions to optimize profit. The model is fast, intuitive, flexible, and robust to uncertainty. Its outputs include specific design recommendations, financial impact estimates, dynamically generated product routing diagrams, and multi-scenario sensitivity analysis. Through two case studies, the first in U.S. smartphone returns and the second in Europe, Middle East and Africa (EMEA) Alienware-branded computer returns, we show how our model fosters standardized, robust strategic decision-making and serves as a platform upon which to build management systems for continuous improvement. We then discuss two such systems: a simulation-based reusable packaging cost-benefit analysis (CBA) calculator, and an automated dashboard for managing disassembly-for-parts decisions.
by Timothy J. Vasil.
S.M.
M.B.A.

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Bianchini, Alberto. "Analisi multi-obiettivo in ottica lean-green della reverse logistics dei veicoli a fine vita (ELV)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.

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La gestione del fine vita dei prodotti è un argomento di interesse attuale per le aziende; sempre più spesso l’imprese non possono più esimersi dall’implementare un efficiente sistema di Reverse Logistics. Per rispondere efficacemente a queste nuove esigenze diventa fondamentale ampliare i tradizionali sistemi logistici verso tutte quelle attività svolte all’interno della Reverse Logitics. Una gestione efficace ed efficiente dell’intera supply chain è un aspetto di primaria importanza per un’azienda ed incide notevolmente sulla sua competitività; proprio per perseguire questo obiettivo, sempre più aziende promuovono politiche di gestione delle supply chain sia Lean che Green. L’obiettivo di questo lavoro, nato dalle esigenze descritte sopra, è quello di applicare un modello innovativo che consideri sia politiche di gestione Lean, che dualmente politiche Green, alla gestione di una supply chain del settore automotive, comprendente anche le attività di gestione dei veicoli fuori uso (ELV). Si è analizzato per prima cosa i principi base e gli strumenti utilizzati per l’applicazione della Lean Production e del Green supply chain management e in seguito si è analizzato le caratteristiche distintive della Reverse Logistics e in particolare delle reti che trattano i veicoli a fine vita. L’obiettivo finale dello studio è quello di elaborare e implementare, tramite l’utilizzo del software AMPL, un modello di ottimizzazione multi-obiettivo (MOP- Multi Objective Optimization) Lean e Green a una Reverse Supply Chain dei veicoli a fine vita. I risultati ottenuti evidenziano che è possibile raggiungere un ottimo compromesso tra le due logiche. E' stata effettuata anche una valutazione economica dei risultati ottenuti, che ha evidenziato come il trade-off scelto rappresenti anche uno degli scenari con minor costi.

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Gholizadeh, Tayyar Shadan. "An optimization-based framework for concurrent planning of multiple projects and supply chain : application on building thermal renovation projects." Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2017. http://www.theses.fr/2017EMAC0006/document.

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Le contexte d’application de cette recherche a été le projet CRIBA. CRIBA vise à industrialiser une solution intégrée de rénovation et d’isolation de grands bâtiments. De ce fait, une part importante de la valeur ajoutée est transférée des chantiers de rénovation vers des usines de fabrications devant être synchronisées avec les chantiers. La planification est l'une des étapes importantes de la gestion de projets. S’adaptant à une organisation, elle vise une réalisation optimale en considérant les facteurs de temps, coût, qualité ainsi que l’affectation efficace des ressources. Cette affectation est d’autant plus complexe lorsqu’un ensemble de projets se partagent les ressources, renouvelables ou non renouvelables. L'objectif global de notre étude est de développer un outil d’aide à la décision pour un décideur visant à planifier plusieurs projets en intégrant l'allocation des ressources renouvelables, et la planification des flux de ressources non-renouvelables vers ces projets. Dans ce cadre, les ressources non renouvelables telles que les machines et la main-d'œuvre ont une disponibilité initiale limitée sur les chantiers. Cependant, nous supposons que des quantités limitées supplémentaires peuvent être achetées. En outre, nous prenons en compte la volonté des coordinateurs des projets pour l’approvisionnement des chantiers en juste à temps (just in time), en particulier pour les ressources peu demandées, encombrantes et à forte valeur. Ceci oblige à étendre le cadre du modèle de la planification des projets en incluant la planification de la chaîne logistique qui approvisionne les ressources non renouvelables des chantiers. Enfin, pour répondre au besoin d’outils décisionnels responsables sur le plan environnemental, le modèle prévoit le transport et le recyclage des déchets des chantiers dans les centres appropriés. Un modèle linéaire mixte du problème est ainsi posé. Puisqu’il rentre dans la classe des modèles d'optimisation NP-durs, une double résolution est proposée. D’abord à l’aide d’un solveur puis une méta-heuristique basée sur un algorithme génétique. De plus, pour faciliter l'utilisation du modèle par des utilisateurs peu familiers avec la recherche opérationnelle, un système d'aide à la décision basé sur une application web a été développé. L’ensemble de ces contributions ont été évaluées sur des jeux de test issus du projet CRIBA
The application context of the current study is on a CRIBA project. The CRIBA aims to industrialize an integrated solution for the insulation and thermal renovation of building complexes in France. As a result, a significant part of the added value is transferred from the renovation sites to the manufacturing centers, making both synchronized. Planning is one of the important steps in project management. Depending on the different viewpoints of organizations, successful planning for projects can be achieved by performing to optimality within the time, cost, quality factors as well as the efficient assignment of resources. Planning for the allocation of resources becomes more complex when a set of projects is sharing renewable and non-renewable resources. The global objective of the study is to develop a decision-making tool for decision-makers to plan multiple projects by integrating the allocation of the renewable resources and planning the flow of non-renewable resources to the project worksites. In this context, non-renewable resources such as equipment and labor have a limited initial availability at the construction sites. Nevertheless, we assume that additional limited amounts can be added to the projects. In addition, we take into account the interest of the project coordinators in supplying the non-renewable resources in a just-in-time manner to the projects, especially for low-demand resources with a high price. This requires extending the framework of the project planning by including the planning of the supply chain which is responsible. Finally, in order to meet the requirements for environmentally responsible decision-making, the model envisages the transportation and recycling of waste from project sites to appropriate centers. A mixed integer linear model of the problem is proposed. Since it falls within the class of NP-hard optimization models, a double resolution is targeted: first, using a solver and then a metaheuristic based on the genetic algorithm. In addition, in order to facilitate the use of the model by users unfamiliar with operational research, a web-based decision-making support system has been developed. All the contributions are evaluated in a set of case studies from the CRIBA project

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Braz, Antonio Carlos. "A gestão da cadeia de suprimentos de ciclo fechado para criar e capturar valor." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/12/12139/tde-12112018-154953/.

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As pesquisas identificam os modelos e práticas ligados a cadeias de suprimentos de ciclo fechado, como uma das estratégias para o desenvolvimento sustentável através da recuperação do produto pós-consumo, maximizando a criação de valor ao longo de todo seu ciclo de vida, transformando o que é resíduo em produto para novo uso. O objetivo desta pesquisa é identificar como a gestão da cadeia de suprimentos de ciclo fechado pode criar e capturar o valor deste produto pós-consumo. O método adotado foi de múltiplos estudos de caso explorando duas cadeias de suprimentos de ciclo fechado a de baterias automotivas chumbo ácido e de produtos eletrônicos tais como telefones celulares, notebooks, tablets, impressoras, desktops e monitores no Brasil. Primeiro conduzimos uma análise do relacionamento entre as empresas de cada cadeia e então expandimos nossa análise comparando as duas cadeias. Os resultados sugerem que para criar e capturar valor na cadeia de suprimentos direta ou tradicional é necessário a gestão das dimensões prioridades competitivas, estrutura da cadeia de suprimentos, relacionamento comprador-fornecedor, compras estratégicas e inovação. Entretanto, para a cadeia de suprimentos de ciclo fechado criar e capturar valor será necessário além da gestão destas dimensões adicionarmos maior interdependência entre as empresas, vantagem colaborativa, gestão tétrade multinível e uma estrutura da cadeia de suprimentos com novas ramificações em outros setores e indústrias que aumenta a quantidade de produtos pós-consumo retornados, resultando em um importante ganho de economia de escala, com foco no processo de reciclagem.
The researches identify closed loop supply chain models and practices as one of the sustainable development strategies through post consumption product recovery, maximizing value creation over the entire life cycle of a product transforming waste in a product for new use. The aim of this research is to understand and identify how the closed loop supply chain management can create and capture the value of this post consumption product. By adopting a multiple case study method, studying two Brazilian\'s closed loop supply chain the lead acid battery industry supply chain and electronic products industry supply chain for mobile phones, notebooks, tablets, printers, desktops and monitors. We first conduct a relationship analysis between the firms of each supply chain then we expand our analysis comparing the two chains. The results show that for value creation and capture in supply chain is required management in dimensions competitive priorities, supply chain structure, buyer supplier relationship, strategic purchasing and innovation. However for closed loop supply chain besides management in these dimensions we must add firms\' bigger interdependency, collaborative advantage, multi-level tetrad management and a supply chain structure with new connections in others industries, that increases the post consumption product\'s return resulting in an important gain from economies of scale focusing in recycling process.

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Aguilar, Johansson Ida, and Andrea Runstrand. "Obstacles in the textile upcycling chain, a case study of the communication between small-scaled upcycling actors and their processes." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-23802.

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Upcycling of textiles is a well-known method to remake worn textiles and decrease the environmental impact coming from the textile industry. Many fast fashion companies have tried to implement upcycling in their own textile value chains to become more circular. Although the effort is good in theory, there is more to be done to get better efficiency when it comes to upcycling textile fashion products. The purpose of this report was to study the obstacles in the textile upcycling chain for small-scaled actors that are engaged in design driven upcycling. This report partly investigates a specific textile value chain that is based on redesigning home textiles that comes from textile consumer waste. The report investigates the collaboration between supplier, designer and manufacturer in this specific value chain. This was by outlining their current communication and process steps. The report intends to form a ground for creation of communication tools for actors working similarly. Re:textile at Science Park Borås is a project that is working towards developing new design principles, business models and production systems in the textile industry for a better circular flow system. The cooperation with Anna Lidström, Artistic Director at Re:textile, made it possible to investigate the upcycling industry and identify the obstacles in the pre-production and production process. For collecting information for this report, data research and interviews with Swedish companies have been done. The companies that attended the interviews were from different companies in the textile upcycling industry, that were provided with as much information as possible for the analysis. The companies that attended the interviews were from different companies in the textile upcycling industry. The companies were Rave Review, XV Production, Björkåfrihet and SIPTex. The information from the interviews contributed a ground for the analysis. The semi-structured interviews varied from telephone interviews and visits. The compilations from the interviews have been carefully used to answer the reports research questions. Conclusions are presented as obstacles for the textile upcycling chain at design driven small-scaled actors. One obstacle is to cater bigger quantities of textile consumer waste that keeps the same quality. Another obstacle is the way of ensuring the quality of the product through the value chain to consumers. The third obstacle is that the communication tools are not written according to any principles which contribute to mistakes in the manufacturing process.
Återbruk av textilier är en väl omtalad metod för att ta vara på använda textilier för att minska på miljöpåverkan som kommer från textilindustrin. Många snabbt modeväxlande företag har försökt implementera återbruk i deras egna värdekedjor för att bli mer cirkulära. Även om tanken är god, så är det mer som behöver göras för att få en bättre effektivitet när det kommer till att återbruka textila modeprodukter. Syftet med rapporten var att undersöka hinder i den textila återbrukskedjan hos småskaliga aktörer som ägnar sig åt designdriven återbruk. Rapporten utreder dels en specifik textil värdekedja som grundar sig på att omdesigna hemtextilier som kommer ifrån textilt konsumentavfall. Rapporten utreder samarbetet mellan leverantör, designer och tillverkare i denna specifika värdekedja. Detta genom att redogöra för deras nuvarande kommunikation och processteg. Studien avser att ligga till grund för skapandet av kommunikationsverktyg för aktörer som arbetar liknande. Re:textile på Science Park Borås är en verksamhet som jobbar med att utveckla nya designmetoder, företagsmodeller samt produktionssystem i textilindustrin för ett bättre cirkulärt flödessystem. Samarbetet med Anna Lidström, Konstnärlig Ledare på Re:textile gjorde det möjligt för författarna att undersöka återbruksindustrin och identifiera bristerna i förproduktion och produktionsprocessen. För insamling av information till denna rapport har datainsamling och intervjuer med svenska företag gjorts. Företagen som ställde upp på intervju var ifrån olika verksamheter i den textila återbruksindustrin. Företagen var Rave Review, XV Production, Björkåfrihet och SIPTex. Information från intervjuerna bidrog till underlag för en analys. De semi-konstruerade intervjuerna varierade med både telefonintervju samt platsbesök. Sammanställningarna från intervjuerna har med aktsamhet använts för få svar på rapportens frågeställningar. Slutsatser redogörs som hinder för den textila återbrukskedjan hos designdrivna småskaliga aktörer. Ett hinder är bland annat att tillgodose större kvantiteter av textilt konsumentavfall som håller samma kvalitet. Ett annat hinder är att säkerställa kvalitén av produkten genom värdekedjan till kund. Ett tredje hinder är att kommunikationsverktygen inte är skrivna enligt några principer vilket bidrar till misstag i tillverkningsprocessen.

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Atamer, Busra. "Optimal Pricing And Production Decisions In Reusable Container Systems." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612207/index.pdf.

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In this study, we focus on pricing and production decisions in reusable container systems with stochastic demand. We consider a producer that sells a single product to the customers in reusable containers with two supply options: (i) brand-new containers, (ii) returned containers from customers. Customers purchasing the products may return the containers to the producer to receive a deposit price. The return quantity depends on both customer demand and the deposit price determined by the producer. Hence, the producer has the opportunity to manipulate the return quantity via the deposit price. The unit cost of filling brand-new containers is different than the unit cost of refilling returned containers. We also consider resource restrictions on the production operations. Our setting represents certain hybrid manufacturing / remanufacturing systems where (i) the producer collects and recovers his own products, (ii) the producer supplies both brand-new and recovered products to his customers, and (iii) the customers are indierent between brand-new and recovered products. In this setting, we investigate the optimal pricing and production decisions in order to maximize the producer`s profit. Our approach utilizes non-linear optimization techniques. We characterize the optimal acquisition fee and the optimal order quantity of brand-new containers analytically and investigate the effect of parameters with an extensive computational study.

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Pereira, Marina Meireles. "PREVISÃO DE RETORNO DE PNEUS INSERVÍVEIS EM UMA CADEIA DE SUPRIMENTOS DE CICLO FECHADO." Pontifícia Universidade Católica de Goiás, 2016. http://localhost:8080/tede/handle/tede/2481.

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Made available in DSpace on 2016-08-10T10:40:36Z (GMT). No. of bitstreams: 1 MARINA MEIRELES PEREIRA.pdf: 5021994 bytes, checksum: 7b9170817bc15d6c6c8810e83ac1330e (MD5) Previous issue date: 2016-02-15
This research aims to apply a prediction model to a tire closed-loop supply chain to estimate the volume returned of scrap tires, through the variables that influence the amount and time that these tires are returned to destination. The methodological approach applied in this research is the modeling by applying the Transfer Function Model. It starts with the analysis that the tire closed-loop supply chain of Goiás and the Federal District is structured and there is a direct relationship between sales of tires with the amount returned. Were adopted as model input variables the amount of tires placed on the market for after-market and the size of the current fleet of these places, representing the amount of tires entered the market for new cars sold. For the output variable was considered the quantity of scrap tires collected and sent for disposal. The data for the survey were collected in the organization s databases adopted as an object of study, IBAMA, DENATRAN, ANIP and AliceWeb considering a period of 54 months. Data were analyzed by the transfer function model and the results showed that the lag time after the tires were entered on the market was around 12 months for all input variables, the return probability of the after-market are greater than the return probability of the tire fleets, and the behavior of the predicted return showed an approximate behavior of the real return with a percentage deviation of 3.4%. Therefore, this study enabled us to identify the variables that influence the return of scrap tires and scale the amount of returned volume tires and the time of this return to facilitate the planning of the tires of closed-loop supply chain.
Esta pesquisa visa aplicar um modelo de previsão a uma cadeia de suprimentos de ciclo fechado de pneus, para estimar o volume de pneus inservíveis retornados, por meio das variáveis que influenciam na quantidade e no tempo que estes pneus retornam para serem destinados. A abordagem metodológica aplicada nessa pesquisa se situa na Modelagem, aplicando o Modelo de Função de Transferência. Parte-se da análise de que a cadeia de suprimentos de ciclo fechado do Estado de Goiás e Distrito Federal está estruturada e que há uma relação direta entre as vendas de pneus com a quantidade retornada. Foram adotadas como variáveis de entrada do modelo a quantidade de pneus inseridos no mercado, pelo mercado de reposição e o tamanho da frota circulante destas localidades, representando a quantidade de pneus inseridos no mercado pelos carros novos vendidos. Para a variável de saída foi considerada a quantidade de pneus inservíveis coletados e encaminhados para destinação final. Os dados utilizados na pesquisa foram coletados em bancos de dados da organização adotada como objeto de estudo, IBAMA, DENATRAN, ANIP e AliceWeb, considerando de um período de 54 meses. Os dados foram analisados pelo modelo de função de transferência e os resultados obtidos mostraram que o tempo de defasagem da entrada de pneus no mercado foi em torno de 12 meses para todas as variáveis de entrada, que as probabilidades de retorno do mercado de reposição são maiores que as probabilidades de retorno dos pneus das frotas e que a previsão de retorno apresentou um comportamento aproximado do comportamento real do retorno com um desvio percentual de 3,4%. Portanto, este estudo possibilitou identificar as variáveis que influenciam no retorno de pneus inservíveis e a dimensionar a quantidade de volume de pneus retornados e o tempo desse retorno para viabilizar o planejamento da cadeia de suprimentos de ciclo fechado de pneus.

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Boudhar, Hamza. "Optimisation de la politique de remanufacturing des pièces de rechange dans le cadre d'une maintenance intégrée à une chaîne logistique en boucle fermée." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0024/document.

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Motivés par l'évolution des réglementations en matière d'écologie mais aussi par des contraintes purement économiques, plusieurs secteurs industriels se sont retrouvés dans l'obligation de développer de nouvelles méthodes et modèles pour la gestion des produits en fin de vie. Dans ce contexte, la remanufacturation vise à gérer la récupération de la valeur d’un produit avant sa fin de vie. Elle permet de prolonger le cycle de vie du produit et d’économiser une partie des besoins industriels en matière première. Ces produits remanufacturés seront remis dans le marché et destinés à une autre catégorie de clients, différente de celle des produits neufs. Dans d'autres cas, les produits remanufacturés sont réutilisés sous la forme de pièces de rechange dans les actions de maintenance, mais cette réutilisation peut varier selon la stratégie de maintenance adoptée. Dans ce contexte, cette thèse s'intéresse à l’intégration d'un flux d’approvisionnement hybride en pièces de rechange dans un modèle de maintenance basé sur la dégradation stochastique d’un système de production. Deux types de flux d’approvisionnement en pièces de rechange sont étudiés : un flux direct et un flux inverse. Le flux direct est représenté par l'utilisation de pièces de rechange neuves et le flux inverse est représenté par la réutilisation des pièces récupérées lors des remplacements ultérieurs, avec la possibilité de réaliser une action de remanufacturation pour améliorer l'état de dégradation de ces pièces de rechange. Plusieurs problématiques ont été traitées pour permettre de comprendre l'impact et l'influence d'une politique de remanufacturation sur les performances d'un système de production. En effet, dans un premier temps, nous nous sommes intéressés à des systèmes de production composés d'une seule machine. Dans ce cadre, nous avons proposé des études séquentielles puis intégrées pour optimiser la politique de maintenance et celle de l'approvisionnement hybrides en pièces de rechange destinées aux actions de remplacements. Nous avons étudié également la gestion de production soumise à une contrainte de qualité basée sur l'évolution de la dégradation de la machine. Ensuite, et dans un second temps, nous avons présenté des généralisations des modèles étudiés dans le cadre de systèmes de production composés de plusieurs machines. Enfin, nous avons développé un outil d'aide à la décision pour conception de systèmes de production dans le cadre d'une politique de remanufacturation. Cette problématique - du niveau stratégique - vise à sélectionner le meilleur ensemble de machines pour construire un nouveau système de production capable de satisfaire les contraintes de production définies par décideur
Motivated by the change of regulations in the matter of sustainability, but also by pure economic constraints, several industries have found themselves obligated to develop new methods and models for the management of products that are at the end of their life cycle. In this context, the remanufacturing aims at managing the recovery of the product’s value before its end of life. This type of action will extend the product life cycle and save the use of the raw material. These remanufactured products will be re-injected in a market that serves another class of customers, different from the one using new products. In other cases, the remanufactured products are reused as spare parts for the maintenance, but this reuse may vary according to the maintenance strategy adopted. This thesis focuses on the integration of a hybrid flow supply of spare parts in a service model based on stochastic degradation of a production system. Two types of spare parts supply flows are studied: a direct flow and reverse flow. The direct flow is represented by the use of new spare parts and the reverse flow is represented by the reuse of the recovered parts during the replacements, with the ability to perform remanufacturing action to improve the degradation level of these spare parts. Several issues were treated to better understand the impact of remanufacturing policies over the performance of a production system. At the beginning we started our study with production systems composed of a single machine. In this context, we proposed sequential studies then integrated one to optimize the maintenance policy as well as the Hybrid provisioning in regard to spare parts destined to replacement actions. Similarly, we’ve studied the production management subjected to quality constraint based on the machine’s degradation process. Furthermore, we’ve presented generalizations of studied models within the context of a production system composed of several machines. Finally, we’ve developed an aid-to-decision-design tool for production systems within the remanufacturing process. This problematic aims at –from a strategic point- selecting the best group of machines to build a new system of production that is able to satisfy the constraints of a production defined by the decision maker

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38

Zhang, Yipei. "Optimisation de la chaîne logistique agroalimentaire à boucle fermée avec emballages réutilisables." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLE037.

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La chaîne logistique à boucle fermée, qui est une des branches importantes de la chaîne logistique, a reçu une attention particulière au cours des dernières décennies. Toutefois, on trouve peu de recherches dans la littérature sur la chaîne logistique agroalimentaire bien qu'elle soit largement pratiquée dans l'industrie. L'objectif de cette thèse est de proposer de nouveaux modèles et de nouvelles heuristiques pour l'optimisation de la chaîne logistique agroalimentaire à boucle fermée avec emballages réutilisables. A cette fin, trois nouveaux problèmes sont étudiés.Nous étudions d'abord un problème de la chaîne logistique agroalimentaire à boucle fermée avec emballages réutilisables. Ce problème implique un seul fabricant et un seul détaillant. L'externalisation est autorisée. Et le budget d'achat d'emballages réutilisable est limité. L'objectif est de maximiser le profit global de la chaîne logistique. Le problème est formulé en programmation linéaire en nombres mixtes et est démontré NP-difficile. Pour sa résolution, une nouvelle « kernel search-based » heuristique est développée. Les expériences numériques sur un cas d'étude et sur un grand nombre d'instances générées aléatoirement montrent l'efficacité de la méthode proposée.Ensuite, un problème bi-critère de la chaîne logistique agroalimentaire à boucle fermée avec emballages réutilisables est étudié. L'objectif est de maximiser le profit et de minimiser les émissions carbone, simultanément. Dans ce problème, plusieurs détaillants sont considérés. Ce problème est modélisé en programmation linéaire bi-objectif en nombres mixtes et résolu à l'aide d'une méthode de ε-contrainte. En particulier, une heuristique basée sur la relaxation et la fixation est développée pour résoudre à chaque itération le problème transformé à un problème monocritère de la méthode de ε-contrainte. Les resultats numériques sur des instances générées aléatoirement indiquent que la performance de la méthode développée est comparable avec celle proposée par le solveur CPLEX.Finalement, nous nous intéressons à un problème intégrant la gestion des stocks et la tournée de véhicules dans la chaîne logistique agroalimentaire à boucle fermée avec emballages réutilisables. Dans ce problème, les emballages réutilisables avec différents niveaux de protection sont considérés. Le problème est formulé en programmation linéaire en nombres mixtes and est démontré NP-difficile. Le modèle proposé est validé via des expériences numériques
Closed-loop supply chain (CLSC), as an important branch of supply chain, has received increasing attention in recent decades. However, CLSC for perishable food products that is more complex than classic CLSC has been seldom studied in spite of its growing applications in practice. This thesis aims to develop new models and methods for optimizing closed-loop food supply chain with returnable transport items. To this end, three new problems are investigated.Firstly, a closed-loop food supply chain with returnable transport items (CLFSC-RTI) is studied. This problem involves a single manufacturer and a single retailer. Outsourcing is permitted and RTI purchasing budget is limited. The objective is to maximize the total profit of the supply chain. The problem is formulated as a mixed integer linear program (MILP) and it is proved to be NP hard. To solve the problem, an improved kernel search-based heuristic is designed. Computational experiments on a real case study and extensive random instances demonstrate the effectiveness and efficiency of the proposed model and heuristic.Secondly, a bi-objective closed-loop food supply chain with returnable transport items (BCLFSC-RTI) is investigated. The two objectives are to maximize the total profit and to minimize carbon emissions, simultaneously. The studied problem considers multiple retailers. For this complex bi objective problem, a bi-objective MILP is proposed for its modelling, and an iterative ε-constraint method is applied to solve it. Then, a relax-and-fix heuristic is developed to solve the transformed single objective problem in each iteration of the ε-constraint method. Computational results based on various randomly generated instances show that the performance of the proposed method is comparable to that of a state-of-the-art commercial optimization solver CPLEX.Finally, a closed-loop food inventory-routing problem with RTIs (CLFIRP-RTI) is addressed. In this problem, a vehicle routing problem is integrated and returnable transport items with different protective levels are considered. An appropriate MILP is proposed to formulate the problem, and the problem is proved to be NP-hard. Numerical experiments are carried out to validate the proposed model

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39

Chekoubi, Zakaria. "Problème intégré de dimensionnement de lots et de tournées de véhicules avec remanufacturing des produits en fin de vie." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0209.

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Dans une chaîne logistique traditionnelle, les opérations de production, de stockage et de distribution sont traitées séparément en raison de la complexité de la planification conjointe de ces opérations et le manque d'informations partagées entre les parties prenantes. Aujourd'hui, pour faire face à la concurrence féroce que connaît le marché mondial, les entreprises sont obligées de planifier conjointement ces activités afin de bénéficier des avantages économiques et environnementaux engendrés par cette intégration. Parmi les problèmes d’optimisation existants dans la littérature, le problème de la planification intégrée qui optimise conjointement les décisions de production, de gestion des stocks, de distribution et de tournées de véhicules, a récemment fait l'objet d'une attention considérable, malgré sa nature NP-difficile. En effet, ses avantages en termes de synchronisation entre les processus, de réduction des coûts et d’amélioration du niveau de service peuvent être importants. En outre, l’optimisation de ce problème dans le contexte des chaînes logistiques en boucle fermée avec gestion des Produits en Fin de Vie (PFV) conduit au développement de chaînes logistiques de plus en plus durables. De plus, les inquiétudes croissantes sur les enjeux environnementaux liés aux activités industrielles ont conduit à l'émergence de politiques de contrôle des émissions carbone. La prise en compte de ces réglementations peut conduire à un impact positif sur la responsabilité environnementale de l’entreprise. Pour répondre à ces défis, l’objectif de cette thèse consiste à concevoir des modèles et de développer des approches d’optimisation pour résoudre un problème de planification intégrée des opérations de production, de ré-usinage, de stockage et de distribution directe-inverse. Nous avons considéré une chaîne logistique en boucle fermée composée d’une ligne de production de produits neufs, d’une ligne de ré-usinage des PFV retournés, deux stocks pour les produits réutilisables et les PFV à ré-usiner, ainsi que des clients ayant des demandes dynamiques en livraison et en collecte. Le but est de déterminer les quantités optimales à produire, ré-usiner et stocker, ainsi que l’ordre de passage chez les clients afin de satisfaire leurs demandes simultanément en livraison et en collecte, tout en minimisant le coût total dû aux opérations induites. Dans un premier temps, un modèle linéaire en nombres entiers est proposé pour optimiser la chaîne logistique en considérant un ou plusieurs véhicules avec capacité limitée. La deuxième partie de la thèse porte sur le développement d’une heuristique de décomposition à deux phases pour résoudre le modèle intégré étendu. La dernière partie de la thèse est consacrée à l’intégration des émissions du dioxyde de carbone dans les décisions de production, de ré-usinage, de stockage et de distribution et d'étudier le comportement des niveaux d'émissions de carbone dans le cadre de la politique de plafonnement et d'échange de droits d'émission de carbone. Des expérimentations numériques permettent de démontrer l’applicabilité et les limites de nos approches
In a traditional supply chain, production, inventory and distribution operations are treated separately due to the complexity of jointly planning these operations and the lack of information shared among stakeholders. Today, in order to face the fierce competition in the global market, companies are forced to jointly plan these activities in order to benefit from the economic and environmental benefits generated by this integration. Among the optimization problems existing in the literature, the integrated planning problem which jointly optimizes production, inventory management, distribution and vehicle routes decisions, has recently received considerable attention, despite its NP-hardiness. Indeed, its benefits in terms of synchronization between processes, cost reduction and improved service level can be significant. In addition, the optimization of this problem in the context of closed-loop supply chains with End-of-Life Product (EOL) management leads to the development of increasingly sustainable supply chains. Furthermore, growing concerns about environmental issues linked to industrial activities have led to the emergence of policies to control carbon emissions. Taking these regulations into account can have a positive impact on the company's environmental responsibility. To meet these challenges, the objective of this thesis is to design models and develop optimization approaches to solve an integrated planning problem of production, remanufacturing, storage and direct-reverse distribution operations. We considered a closed-loop supply chain consisting of a production line for new products, a remanufacturing line for returned EOL products, two types of inventories for reusable products and EOL ones to be remanufactured, as well as customers with dynamic demands for delivery and pickups. The goal is to determine the optimal amounts to produce, remanufacture and store, as well as the order of visiting customers in order to meet their requests simultaneously for delivery and pickup, while minimizing the total cost due to the involved operations. First, a linear integer model is proposed to optimize the supply chain system by considering one or more vehicles with limited capacity. The second part of the thesis concerns the development of a two-phase decomposition heuristic to solve the extended integrated model. The last part of the thesis is devoted to the integration of carbon dioxide emissions into production, remanufacturing, inventory and distribution decisions and to study the behavior of carbon emission levels in the context of cap-and-trade policy. Numerical experiments make it possible to demonstrate the applicability and the limits of our approaches

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40

Liu, Guo-ming, and 劉國銘. "Closed-Loop Supply Chain in B2B Electronic Markets." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/75132521607917006724.

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碩士
國立屏東商業技術學院
企業電子化研究所
100
This study investigates the performances of closed-loop supply chains with remanufacturing by developing analytic models under cooperative and competitive settings in business-to-business electronic and traditional transaction markets. The manufacturer, acting as a leader in the channel, decides the wholesale price. The retailer, acting as a follower in the channel, decides the goods quantity and retail price. The analysis reveals that the solution generated by the cooperative setting outperforms that by the competitive setting in maximizing the channel-wide profit under consignment contracts in electronic markets for remanufacturing goods.

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41

Huang, Chien-Wen, and 黃建文. "Stochastic Optimization Modeling of Closed-Loop Supply Chain." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/53373938222556442325.

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碩士
國立清華大學
工業工程與工程管理學系
100
This paper presents a stochastic optimization model for a closed-loop supply chain. The core component can be recycled from either new or used market. The quality of recycled core component is uncertain. In each period, the manager has to decide how many new products to produce, how many used products to remanufacture, and how many core components to recycle from new and used market. The objective is to maximize the profit. An efficient value iteration algorithm is developed to solve the problem. The stationary solutions provide relationships between values of decision variables and inventory levels. The performance of dynamic policy is compared with two common practices. The result shows that dynamic policy is desirable in certain conditions. Managerial insights regarding how parameters impact decision variables are discussed.

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42

Yin, Jie-Hao, and 尹傑顥. "Signal Game in a Closed-loop Supply Chain." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/81931479072563912157.

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碩士
國立雲林科技大學
工程科技研究所
104
This study discusses the strategy and operational interactions in closed-loop supply chain under a signal game. The closed-loop supply chain consists of an OEM (Original Equipment Manufacturer), a collector and a remanufacturer. The OEM sells the new products, remanufacturer recoveries the used items collected by the collector. In the first period, the OEM is a monopolist in the market, and, in the second period, the remanufacturer enters the market to recovery the used items that were produced by the OEM, and then competes with the OEM. However, the remanufacturer lacks information of market size by the OEM to choose the remanufacturing strategy, i.e., the strategy remanufacturing all available cores or achieving economics of scale. The collector can partially obtain the information of market size through the collection of used items produced by the OEM. Hence, the collector decides whether to reveal the information to remanufacturer, and correspondingly, the OEM choose the signaling strategy, i.e., pooling or separating strategy. We formulate such a sequential game among the firms, and then derive the firm’s equilibrium under every sub games. Key word：information asymmetry、closed-loop supply chain、signal game.

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43

Yeh, Jun-Sheng, and 葉潤生. "Closed-Loop Supply Chain Models in an Electronics Industry." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/42067734178052702889.

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碩士
國立交通大學
工業工程與管理系所
97
Environmental protection issues including recycling for end-of-life products had drawn much attention in many countries recently. In electronics industry, the volume of obsolete products is increasing rapidly nowadays. Several legislations such as WEEE (Waste Electrical and Electronic Equipment Directive) and RoHS (Restriction of Hazardous Substances Directive) are proposed to regulate the recycling operations of toxic electronics products. In the Europe, manufacturers are required to recycle their own end-of-life products. Closed-loop supply chains consisting of forward and reverse directions are widely used to analyze these recycling issues. In this study, we investigate on the current practices of three major information technology manufacturers (Dell, HP, and Acer). Then, we develop a model with retailers engaging in collection to make the recycling logistics system more efficient.

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44

Lee, Chi-Ming, and 李啟銘. "Considering the quality differences of closed-loop supply chain." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/63764648256204574835.

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45

Chi, Chu-yu, and 紀竺雨. "Reversed Channel Design In A Closed-Loop-Supply-Chain." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/80905241503082151985.

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碩士
國立中央大學
工業管理研究所
101
In recent years, many green-related studies have been proposed to deal with environmental change. This study deals with the reversed channel design issue, analyzing a closed-loop supply chain which includes a single manufacturer and a single retailer. We model three channel structures which include remanufacturing and recovering activities. First, consider a centralized indirect collection system model. Second, we model a decentralized indirect collection system in which the retuned core collection by the retailer. Last, the manufacturer collects the cores, which is defined as a decentralized direct collection system. In all the models, the new and remanufacturing products’ demand is price-dependent, and prices of the new and remanufactured products can be distinguished, i.e., it sales different prices in the market. This study, explores the collection activities in different channel structures.

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46

Wu, Hsing-Huan, and 吳幸寰. "Price and Incentive Decisions in a Closed-loop Supply Chain." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/11764416736661285154.

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碩士
國立雲林科技大學
全球運籌管理研究所碩士班
100
Economics and environmental conscious drives remanufacturing being commonly adopted by many companies .Such a scenario leads to competition between companies not only at prices but also on how to collect more used products for remanufacturing. This paper considers a closed-loop supply chain, including an original equipment manufacturer （OEM） and remanufacturer. The OEM is capable of producing new products and reusing used products for cost savings. We examine the chain members'' interaction in a two-period model: In the first period, only the OEM sells the new products to market, In the second period, the OEM has a option to collect the used products for reuse or not, but the remanufactures must collect the used products for remanufacturing and then sells the remanufactured products to the market in competing with the OEM. Under such a scenario, there are three different cases emerged. First, the OEM and remanufacture interact only on their price decisions. Second, only remanufacturer offers an incentive to product holders for used products. Third, both OEM and remanufacturer offer incentives to the return market, such that both price competition and collection competition exist. We will derive the equilibrium prices and incentives of the OEM the remanufacturer for profit maximization-when considering that the capacity of remanufacturing is unconstrained or constrained by the collected quantity. Moreover, we characterize the chain members'' pricing and collecting behaviors and their performances at equilibrium with regard to the changes of the costs and market conditions. Finally, we provide the managerial insights associated with remanufacturing for supply chain managers.

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47

Chen, Wei-Hao, and 陳韋顥. "Product Characteristics and Choice of Closed-Loop Supply Chain Structures." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/60897301761863244755.

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碩士
國立清華大學
工業工程與工程管理學系
97
Due to rising awareness of environmental protection and stringent regulations, firms are held responsible for collecting and recycling the goods they manufactured. Hence, the closed-loop supply chain, which not only deals with goods delivery from manufacturers to consumers but also recycling from consumers to manufacturers, arouses much research interest. Considering the combination of centralized/decentralized evaluation point design and focus/general facility, we construct four closed-loop supply chain structures. They are Centralized-Focus (CF), Centralized-General (CG), Decentralized-Focus (DF), and Decentralized-General (DG). In this research we take into account the time value, use queueing theory to evaluate average flow times of facilities in the structure, and develop profit function for each structure based on the average flow times. Furthermore, we study how product characteristics such as return rate, percentage of new returns, price at the primal market and secondary market, production cost and remanufacturing cost, and time discount rate impacts the choice of the closed-loop supply chain structures. For example, we find that if return rate is increased, manufacturer will tend to adopt DG structure. And if remanufacturing cost decay rate is less, manufacturer will tend to adopt CF structure.

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Li, Vic, and 李淋維. "The impact of component commonality on closed-loop supply chain." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/36381577556293561622.

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碩士
國立清華大學
工業工程與工程管理學系
98
Due to the rising awareness of environmental protection and stringent regulations, companies are expected to take more responsibility to protect the environment including collecting and recycling their product. Hence, closed-loop supply chain which not only dealing with the distribution of new products but also collection and recycle of the used products becomes a very important research topic. In addition, many literatures in forward supply chain point out the importance of product design. In this research, we follow the same concept and apply it to closed-loop supply chain, especially how component commonality impact the closed-loop supply chain. We consider two closed-loop supply chain structures, Parallel and Mix. In the Parallel structure, the assembly and disassembly lines are separated while in Mix structure they are performed by the same production line. We study how the usage and the location of common component as well as the degree of delayed differentiation enabled by common component impact the cycle time of forward supply chain under these two structures. We base on the character of component commonality and closed-loop supply chain to address some hypotheses of managerial insights to help managers design their product better using common component in the closed-loop supply chain

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Wang, Yen-Jung, and 王嬿容. "Integrated design and closed loop supply chain system for supplier selection." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/58276418914718252830.

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碩士
元智大學
工業工程與管理學系
98
As the products are changing faster and faster, enterprise needs to adjust product’s size, design, function... and so on, to satisfy customers require and enhance their competitiveness. In the view of life cycle cost, the most cost rivet on the acquisition stage and the end life part. With the rise of environmental consciousness, reverse supply chain should be paid more attention. In the view of supply chain, we need to consider the overall from the initial design stage to the disposal stage in closed loop supply chain to reduce the cost. This study develops a two stages evaluation model to balance the subjective and objective judgments. The first stage uses the matrix of part to find out the coverage after design change. Then use FANP to evaluate the relationship between “designs criterion”, “forward activity criterion” and “reverse activity criterion”. The second stage combines the result of the first stage as the weight with the integer programming model and minimizes the cost. The purpose is to find out the best suppliers selection and the ordered quantity distribution by using this two stage model. This study provides a method to make decision of supplier selection. Decision makers and managers can also use this method to know the priority of those criterions during select the supplier in stage 1 and find out how to do the cost controlling in the stage 2 when the design change happen in closed loop supply chain.

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50

Lee, Yu-Tsang, and 李雨蒼. "A Closed-loop Supply Chain Network Design with Collaborative Transportation Management." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/54117483263808642055.

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碩士
國立交通大學
運輸與物流管理學系
101
Due to the development of globalization, the environment of supply chain has changed, and making global logistics management become an important issue to business operations. Supply chain through strategic alliance to make different members work together making collaborative business a trend, and then increase visibility of supply chain and reduce the bullwhip effect by information sharing. To improve the operation performance, the efficiency of global distribution is playing a critical role. More and more companies are seeking out quick deliver and lower inventory, transportation integration is essential within the supply chain. However, the problem of physical distribution can be solved until CTM making transportation a collaborative partner. In this research, a closed-loop supply chain network design model with collaborative transportation management has been build, to maximizing total supply chain profit. Through the process of adjusting capacity by CTM, companies can increase their operation efficiency. Besides, to consider the sources of product can be different, the model include the part of product return. Finally, the research find out that the model with CTM has higher profit than without CTM, and the available capacity of forward logistics is more important than reverse logistics.

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Dissertations / Theses on the topic 'Closed-loop supply chain (CLSC)'

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