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Bjelkemyr, Marcus. "System of Systems Characteristics in Production System Engineering." Doctoral thesis, Stockholm : Skolan för industriell teknik och management, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10617.
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Keller, James (James Thomas). "System architecture of offshore oil production systems." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45220.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2008.Includes bibliographical references (p. 117-118).
This thesis presents an approach to applying Systems Architecture methods to the development of large, complex, commercial systems, particularly offshore oil and gas productions systems. The aim of this research was to assist BP in the development of concepts for a multi-billion dollar oil production system, particularly in the unprecedented deep water arctic locations prone to seismic activity, as well as in existing fields that must be extended. The thesis demonstrates that these systems can be decomposed and analyzed using rigorous, methodical system architecture thinking that archives and represents tacit knowledge in several graphical frameworks. The thesis breaks the architecture of oil and gas production systems into two problems. The first problem is the architecture of one facility and one reservoir; a classic problem of assigning function to form. The second problem is the architecture of multiple facilities and multiple reservoirs; a classic problem of connection and routing. For the first problem, the production process is decomposed using Object Process Methodology (OPM). The decompositions provide a methodology to capture industry knowledge that is not always explicitly stated and provides a framework to explore the entire architectural design space. The thesis then describes how these decompositions of general and specific oil systems can be used to develop software models, using the meta-language tool OPN (Object Process Network), that successfully generate thousands of architecture concepts. This set of feasible architectures can be prioritized and better understood using metrics in an effort to down-select to a handful of preferred concepts to be carried forward for more detailed study and eventual development.
(cont.) The approach to the second problem demonstrates that even a modest set of facilities and reservoirs have a huge number of connection possibilities. This space of connection possibilities is large and daunting, and typically is not fully explored. To solve the second problem the thesis presents two models that generate all the possible connection schemes between elements in a system, in this case oil facilities and reservoirs. It is then demonstrated that these possibilities can be prioritized through the use of metrics. The thesis presents a method that can identify new concepts, highlight preferred sets of concepts, and underline patterns common to those concepts. This method increases the architects' overall knowledge and understanding of the entire space of possibilities, and ensures that all options are considered in the development of complex systems.
by James Keller.
S.M.
3
Tabib, George, and Jonathan Awrohum. "Scania Production System : En kartläggning av Scania Production System och dess utveckling." Thesis, Södertörns högskola, Institutionen för samhällsvetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-34624.
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Syftet med denna rapport är att kartlägga Scania Production System (SPS), hur det motiverades och implementerades inom Scanias organisation samt dra kopplingar mellan tidigare reformer och SPS. Vi vill ta reda på hur Scania lyckats skapa ett eget skräddarsytt produktionssystem som visat sig vara så framgångsrikt och hur detta infördes inom hela organisationen. SPS är ett resultat av Toyota och deras Toyota Production System (TPS) efter ett nära samarbete mellan Scania och Toyota sedan början av nittiotalet. Scanias värderingar, principer och prioriteringar beskrivs av SPS och har visat sig vara en av företagets konkurrensfördelar genom ökad effektivitet samt produktivitet inom produktionen. TPS fick mycket av sin inspiration av de tidigare reformerna Taylorismen och Fordismen ur rationaliseringsrörelsen. Detta genom Taylors idéer om standardisering och Fords löpandebands-princip. Toyota var även bland dem första att utforma och tillämpa de logistiska reformerna Total Quality Management, Lean Production och Just-In-Time i sitt produktionssystem. Reformer som används och är välkända inom många företag inte minst Scania och SPS. Rapporten uppfyllde sitt syfte genom intervjuer och analys av konceptlitteratur för att kunna konstatera att det finns en röd tråd inom företaget och att det finns en tydlig koppling mellan SPS och tidigare reformer. Avslutningsvis lyckades vi även analysera och dra slutsatser om hur SPS utformades, motiverades och implementerades. Utformningen av SPS gick till genom ett nära samarbete mellan ledningar på Scania och Toyota vilken Scania på så sätt kunnat ta inspiration ifrån och kunnat anpassa systemet efter Scanias kultur. Hur sedan SPS motiverades och implanterades föregick i en ledningsprocess som Scania tillämpade inom organisationen. Lösningen kom att bli avgörande för framtiden, ledarskapet. Man tillämpade ett nytt tankesätt genom hela verksamheten vilket har visat sig vara framgångsrikt.The purpose of this report is to map the Scania Production System (SPS), how it was motivated and implemented within Scania's organization, as well as linking previous reforms with SPS. We want to find out how Scania managed to create its own customized production system that proved being successful and how it was introduced throughout the organization. SPS is a result of Toyota and their Toyota Production System (TPS) following a close collaboration between Scania and Toyota since the early 1990s. Scania's values, principles and priorities are described by SPS and have proven to be one of the company's competitive advantages through increased efficiency and productivity in production. TPS received much inspiration from the earlier reforms of Taylorism and Fordism from the rationalization movement. This through Taylor's ideas about standardization and Ford's running band principle. Toyota was also one of the first to design and apply the logistics theory’s Total Quality Management, Lean Production and Just-In-Time in its production system. Reforms used and well known in many companies, not least Scania and SPS. The report fulfilled its purpose through interviews and analysis of conceptual literature to find that there is a red thread within the company and that there is a clear link between SPS and previous reforms. In conclusion, we also managed to analyse and draw conclusions about how the SPS was designed, motivated and implemented. The design of SPS was achieved through close collaboration between Scania and Toyota wires, which enabled Scania to inspire and adapt the system to Scania's culture. The way in which SPS was motivated and implanted preceded a management process that Scania applied to within the organization. The solution came to be decisive for the future, leadership. A new way of thinking was applied throughout the business, which has proved to be successful.
4
Wang, Xiaoyan. "Pull Production System Improvements : Pull Production System Improvements In GKN Driveline AB." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-16545.
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As the effort of today’s industries to continuously move towards lean production, pull production system has been developed as one possible solution of lean. It is popularly known in the industry world, and is indeed a proven technique to achieve substantial savings on inventory, production cost incurred by manufactures all over the world. However, a careful understanding of pull production systems is required to access its suitability to a particular production setup. It is necessary to develop a proper way to implement pull production systems. This study is based on a real life scenario in a leading driveline manufacturing company. The production system is studied in detail as regard to its production characteristic. A theoretical review is first made as research foundation. A careful analysis study within the company is conducted with all the existing constrains to figure out improvement opportunities. Eventually, from the applicability point of view, proposals of future pull production system implementation have been developed. The objective of the proposals is to minimize the identified weaknesses of the current system, including long lead time, low flexibility and unconnected flow.
5
Saeed, Muhammad. "Production and Delivery (Optimization of production system and reliability)." Thesis, Högskolan Dalarna, Datateknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:du-4728.
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This thesis is done to solve two issues for Sayid Paper Mill Ltd Pakistan. Section one deals with a practical problem arise in SPM that is cutting a given set of raw paper rolls of known length and width, and a set of product paper rolls of known length (equal to the length of raw paper rolls) and width, practical cutting constraints on a single cutting machine, according to demand orders for all customers. To solve this problem requires to determine an optimal cutting schedule to maximize the overall cutting process profitability while satisfying all demands and cutting constraints. The aim of this part of thesis is to develop a mathematical model which solves this problem.Second section deals with a problem of delivering final product from warehouse to different destinations by finding shortest paths. It is an operational routing problem to decide the daily routes for sending trucks to different destination to deliver their final product. This industrial problem is difficult and includes aspect such as delivery to a single destination and multiple destinations with limited resources. The aim of this part of thesis is to develop a process which helps finding shortest path.
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Rumí, Pastor Alejandro. "Control system for rotifer production." Thesis, Norwegian University of Science and Technology, Department of Engineering Cybernetics, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-8835.
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Rotifers are used extensively as start feed for many cultured marine fish species and commercial size hatcheries require stable daily supply of high quality rotifers of substantial volumes. This is often done relying on some employees whose knowledge and experience of the process and procedures ensures a stable production. Control techniques have been used in many other industries during many years improving the quality, reliability, predictability and reducing the costs of the production. However, control engineering is not as widely used as in other industries yet and this is the objective of this thesis, study the possibilities of using such techniques in the area of rotifer production at large scale. The benefits of their application will be an increment in the quality and predictability of the production as it becomes less dependant on the experience of people, but on their experience combined with monitoring and control techniques that will maintain the best conditions possible for the cultivation all the time. And also a better use of the resources will be achieved, that leading probably to a reduction of the costs of the production. This thesis makes a study of the biology and cultivation conditions of the rotifers, which is necessary previous to the application of control techniques, and then studies and proposes to different strategies for controlling the growth of the population, one based on the control of the feed density in the cultivation tank and the other based on the egg ratio control. In this work it is mainly done running simulations over a model, but an experiment is also performed for testing the second of the control strategies proposed.
7
Rousseau, Benoît. "Settingup an ERPfree production system." Thesis, KTH, Industriell produktion, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102778.
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Efficient information systems can nowadays be used in order to manage production lines, for all the aspects of the thing: planning, running the operations, quality management, cost control etc. During the last century, computer tools have allowed the creation of more and more complex systems, from basic systems to ERP (Enterprise Resource Planning) that are today the spinal column of most big companies. At the same time as the development of such systems, new philosophies in term of production management have emerged, especially from Japan: the Lean. Whereas ERP systems aim at being predictive, the Lean philosophy focuses on reactivity. It is a really different approach, even though in the last years ERP systems have evolved in order to integrate the tools coming from the Lean. This paper aims at study the possibility to run a production line without a system like an a ERP, with the modern standards in terms of performance. The study has been made between January and September 2010 within the framework of a factory from the Groupe Atlantic, a French company that had opened a new site in 2009 in Izmir (Turkey) for the production of towel radiators. The thesis focuses on three areas: the planning of the production, i.e. the whole process that transform a customer order into a production order. This parts presents the kind of process and the tools (based on Excel and Visual Basic macros) that can be used for those operations. The management of the physical operations. This part focuses on how to deal with the flow of information and material on the production floor, from raw material to expedition. The management of material consumption: it is a sidetopic, yet critical in terms of cost control, and we show what methods and tools we can introduce in order to control this parameter. The main conclusions are that, if an ERP system is not absolutely necessary to run the daily operations, it might appear very useful in order to get the best from the production tool. An ERP allows the collection of a wide range of data that can greatly help in order to optimize the operations.
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Templeton, Jessica. "Production Services Reporting System Analysis." Thesis, University of Canterbury. Engineering Management, 2013. http://hdl.handle.net/10092/7451.
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The purpose of the analysis was to realise potential areas for improvement within the Production Services department. Sources of inefficiency within the Reporting System were identified to support recommendations for the rationalisation, streamlining and alignment of processes.
Lean philosophies and Total Quality Management techniques were reviewed to gain an understanding of applicability to Production Services. Evaluation through Value Stream Mapping determined a reporting process efficiency of 71% and two supplementary waste types were recognised in addition to the standard seven wastes of lean processes. The root cause of inefficiency and waste was investigated further with the 5 Whys Technique. A benchmark was established through reviewing industry based literature and conducting comparative studies of both like and unlike departments. Participant and non-participant naturalistic observation techniques were employed to collect a balanced data set for value stream analysis.
Variable environmental factors were recognised to moderate results from direct analysis of the reporting system. Dissimilar political, economic, sociocultural, technological and legal factors were considered during comparison and benchmark.
The findings in this report provide evidence of issues that should be addressed for the continuous improvement of both the reporting system, and the department. These have been provided for the consideration of Shell Todd Oil Services Limited Production Services and Logistics Manager.
9
Katariya, Abhilasha Prakash. "Joint production and economic retention quantity decisions in capacitated production systems serving multiple market segments." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2985.
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Kristofersson, Filip, and Sara Elfberg. "Maximizing Solar Energy Production for Västra Stenhagenskolan : Designing an Optimal PV System." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-384723.
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Skolfastigheter is a municipality owned real estate company that manages most of the buildings used for lower education in Uppsala. The company is working in line with the environmental goals of the municipality by installing photovoltaic systems in schools and other educational buildings. Skolfastigheter are planning to install a photovoltaic system in a school in Stenhagen. The purpose of this study is to optimally design the proposed system. The system will be maximized, which in this study entails that the modules will be placed on every part of the roof where the insolation is sufficient. The system will also be grid connected. The design process includes finding an optimal placement of the modules, matching them with a suitable inverter bank and evaluating the potential of a battery storage. Economic aspects such as taxes, subsidies and electricity prices are taken into account when the system is simulated and analyzed. A sensitivity analysis is carried out to evaluate how the capacity of a battery bank affects the self-consumption, self-sufficiency and cost of the system. It is concluded that the optimal system has a total peak power of almost 600 kW and a net present value of 826 TSEK, meaning that it would be a profitable investment. A battery bank is excluded from the optimal design, since increasing the capacity of the bank steadily decreased the net present value and only marginally increased the self-consumption and self-sufficiency of the system.
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Keshavarz, Leila. "Analysis of Mooring System for a Floating Production System." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-15823.
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Understanding the behavior of a mooring line that is connected to a Suezmax vessel is a crucial requirement for our industry. Thus, we should model and analyze such a mooring line under a variety of environmental conditions. The output of modeling and analysis are useful to determine if the given mooring line is suitable for that environment or not. In the first part of this project a brief description about floating production platforms and mooring systems has been given and different material used for mooring systems has been discussed. All loads acts on mooring systems have been described and design methods used for mooring system analyses with relevant equation have been summarized. Brief descriptions about standards and guidelines used for mooring analysis have been given. Since we will use RIFLEX software for mooring line analysis, a brief introduction about the concept of the software will be provided. A single mooring line is studied that consists of two material compositions and is connected to Suezmax vessel. In the last part of this thesis, static and dynamic analysis in two regular wave cases will be performed for given mooring lines. We will do the analyses under three tensions 15%, 30% and 45% MBL (Minimum Breaking Load) in two vessel conditions (i.e. ballasted and loaded). The main focus is on effective tension and line displacement determination, that a given mooring line experiences. The results have been discussed.
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KALEEM, ULLAH MUHAMMAD. "INVENTORY CONTROL SYSTEM : Optimization of production system and reliability." Thesis, Högskolan Dalarna, Datateknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:du-4781.
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The main idea of this research to solve the problem of inventory management for the paper industry SPM PVT limited. The aim of this research was to find a methodology by which the inventory of raw material could be kept at minimum level by means of buffer stock level.The main objective then lies in finding the minimum level of buffer stock according to daily consumption of raw material, finding the Economic Order Quantity (EOQ) reorders point and how much order will be placed in a year to control the shortage of raw material.In this project, we discuss continuous review model (Deterministic EOQ models) that includes the probabilistic demand directly in the formulation. According to the formula, we see the reorder point and the order up to model. The problem was tackled mathematically as well as simulation modeling was used where mathematically tractable solution was not possible.The simulation modeling was done by Awesim software for developing the simulation network. This simulation network has the ability to predict the buffer stock level based on variable consumption of raw material and lead-time. The data collection for this simulation network is taken from the industrial engineering personnel and the departmental studies of the concerned factory. At the end, we find the optimum level of order quantity, reorder point and order days.
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Berton, Damiano <1994>. "Microfluidic production of drug delivery system." Master's Degree Thesis, Università Ca' Foscari Venezia, 2021. http://hdl.handle.net/10579/19484.
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Krishnamuti, Gunasheel. "Developing a work in process tracking system via a decision support system." Diss., Online access via UMI:, 2008.
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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, 2008.Includes bibliographical references.
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Boonlertvanich, Karin. "Extended-CONWIP-Kanban System: Control and Performance Analysis." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-04122005-120706/unrestricted/boonlertvanich%5Fkarin%5F200505%5Fphd.pdf.
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Thesis (Ph. D.)--Industrial and Systems Engineering, Georgia Institute of Technology, 2005.Griffin, Paul, Committee Member ; Ferguson, Mark, Committee Member ; Billings, Ronald, Committee Member ; Zhou, Chen, Committee Chair ; Reveliotis, Spiridon, Committee Member. Includes bibliographical references.
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Kenley, Gregory Grant. "An action management system for a distributed operating system." Thesis, Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/9153.
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Asprey, Leonard Gregory. "An extension to system development methodologies for successful production imaging systems." Thesis, Queensland University of Technology, 2000.
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Tefera, Misrak A. "Electricity Production from Concentrated Solar Power and PV System in Ethiopia." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-40426.
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Ethiopia has been facing problems regarding power generation, distribution, balancingbetween demand and supply and access to modern energy service. About 92.4% of energysupply is from biomass (mostly in traditional) 5.7% oil which is not friendly with theenvironment and about 1.6% of energy supply is from renewable energy resource,hydropower plants.Being dependent on hydropower plant causes the country to face many challenges indistribution and balancing demand and supply. This thesis provides another way ofconsidering and implementing renewable energy resource (solar energy resource) throughtechnologies like grid-connected roof mounted solar PV system and CSP plant with the helpof PVGIS, PVWatt and SAM software.This thesis aims to come up with an idea that will work out for current engineering, socialand political issue that is seen in the country. Considering new way in planting PV system onthe roof is strongly recommended and increasing the alternative sites for power generationalong with the appropriate technology is recommended as another way. The possibility andpower generating efficiency is checked through each application.Based on the demonstration in all software’s used, it is clearly visible that the country couldhave been satisfied the needed demand and become the hub of east Africa as mentioned inthe policy and strategy. However, this dependency causes the country to insufficiently supplythe need. Apart from the possibilities and estimation, ideas that might help the country tocome over these challenges are provided in recommendation section.
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Mora-Camino, Félix. "Synthese de travaux sur l'analyse, la planification et la commande de systemes complexes de production et de transport." Toulouse 3, 1987. http://www.theses.fr/1987TOU30209.
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Sarbatly, Rosalam. "Glucose production in the ultrafiltration system and cell-free xanthan gum production." Thesis, University of Bath, 2006. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425663.
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Rösiö, Carin. "Supporting the design of reconfigurable production systems." Doctoral thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH. Forskningsmiljö Industriell produktion, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-20306.
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To compete, manufacturing companies need production systems that quickly can respond to changes. To handle change drivers such as volume variations or new product variants, reconfigurability is advocated as a competitive means. This implies an ability to add, remove, and/or rearrange the structure of the production system to be ready for future changes. Still, it is not clear how the production system design process can capture and support the de-sign of reconfigurable production systems. Therefore, the objective of this thesis is to increase the knowledge of how to support the design of reconfig-urable production systems. Reconfigurability could be defined by a number of reconfigurability char-acteristics including convertibility, scalability, automatibility, mobility, modularity, integrability, and diagnosability. In eight case studies, reconfigu-rability characteristics in production system design were studied in order to investigate reconfigurability needs, knowledge, and practice in manufactur-ing companies. In three of the case studies reconfigurable production sys-tems were studied to identify the links between change drivers and reconfig-urability characteristics. In the remaining five case studies, reconfigurability in the production system design processes was addressed in terms of needs, prerequisites, and consideration. Based on the literature review and the case studies, support for reconfigu-rable production system design is suggested including two parts. The first part comprises support for analyzing the need for reconfigurability. Based on relevant change drivers the need for reconfigurability must be identified to enable selection of right type and degree of reconfigurability for each specif-ic case of application. A comprehensive view of the reconfigurability charac-teristics is presented and links between change drivers and reconfigurability characteristics are described. The characteristics are divided into critical characteristics, that lead to a capacity or functionality change of the produc-tion system, and supporting characteristics, that reduce system reconfigura-tion time but do not necessarily lead to a modification of functionality or capacity of the production system. The second part provides support in how to consider reconfigurability in the production system design process. A holistic perspective is crucial to design reconfigurable production systems and therefore constituent parts of a production system are described. Accord-ing to their character physical, logical, and human reconfiguration must be considered through the whole production system design process.
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Kar, Adwitiya. "Novel 125 I production and recovery system." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1534.
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Lou, Ip Keong. "Unit production control system for garment industry." Thesis, University of Macau, 2002. http://umaclib3.umac.mo/record=b1445660.
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Dervisoglu, Ozgecan. "Inferential Control Of Boric Acid Production System." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/2/12608766/index.pdf.
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Inferential control of boric acid production system using the reaction of colemanite with sulfuric acid in four continuously stirred tank reactors (CSTR) connected in series is aimed. In this control scheme, pH of the product is measured on-line instead of boric acid concentration for control purposes. An empirical correlation between pH and boric acid concentration is developed using the collected data in a batch reacting system in laboratory-scale and this correlation is utilized in the control system for estimator design. The transfer function model of the 4-CSTR system previously obtained is used in the MPC controller design. In the experiments done previously for the modelling of 4-CSTR system, it was observed that the reaction goes complete within the first reactor. Therefore, the control is based on the measurements of pH of the second reactor by manipulating the flow rate of sulfuric acid given to the first reactor, while the flow rate of colemanite fed to the system is considered as disturbance. The designed controller&rsquos performance is tested for set point tracking, disturbance rejection and robustness issues using a simulation program. It is found that, the designed controller is performing satisfactorily, using the inferential control strategy for this complex reacting system.
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Andersen, Magnus Nordahl. "Energy Solution for Floating LNG Production System." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18579.
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This report considers different energy solutions for a floating LNG production vessel. The two alternatives analyzed are gas turbine and steam turbine. In addition to being stand-alone alternatives they are the basis for other alternatives, such as electric drive and combined cycle. Light side studies have been performed on the two latter ones. A LNG process model has been built in Aspen HYSYS, and from this several cases has been run. There are 3 levels of different parameters that have been run: 1) Energy system, 2) Feed Gas Composition, and 3) Liquefaction process. As mentioned the two energy systems are GT and ST. Three different feed gas compositions have been analyzed: 1) Low content of both CO2 and N2 (0.5 % and 1 % respectively), 2) High content of CO2 (9.5 %), and 3) High content of both CO2 and N2 (9.5 % and 3 %). The liquefaction processes analyzed are two of the most promising for a floating LNG application: Dual mixed refrigerant and dual N2 expander.The feed gas compositions was chosen to give a wide area of applications for the results, and to give illustration on how the two different energy solution would respond to changing feed gas composition. The DMR liquefaction process was chosen mainly because this is the one being implemented in Shell Prelude FLNG. Being the most proposed solution for offshore application the dual N2 expander was a natural alternative to the DMR.The analysis show a clear advantage for gas turbine and DMR process, when exclusively looking at efficiency. However; as the objective of the study states, important factors such as safety, vessel motion sensitivity, reliability, availability is also to be considered. The results show 245 kWh/ton LNG energy consumption with the DMR liquefaction process, whereas the dual N2 expander requires 424 kWh/ton LNG; over 70 % increase. However; the side- cases run in this report show advantages to the N2 dual expander in safety, weight/space requirements and ease of start-up and shut down.The ST/N2 has fuel gas consumption 4% higher than the GT/N2. On the basis of the results in this report and other studies performed on FLNG a selection of the ST/N2 setup will be favorable as long as there is a high CO2 content in the feed. With low CO2 content, hence heat demand, the advantage of the ST is smaller thanks to lower heat recovery demand.
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Sun, Jun. "Development of an intelligent production scheduling system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0016/MQ49690.pdf.
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Edling, Andréas, and Jonas Franke. "IBR camera system for live TV production." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-97068.
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Traditional television and video recordings are limited to show only views of a scene from were a camera is positioned. For certain situations, positioning a camera at the most attractive viewpoints might not be possible, such as above a crowd at a concert. In this thesis, technologies for alleviating this limitation, and extending traditional filming processes, by using video-based rendering methods are investigated. With such video-based rendering methods, given a set of existing cameras, images from novel viewpoints can be produced without having any capturing device at the chosen viewpoint. This thesis investigates the current state of image and video-based systems for creating virtual camera views, which techniques are used in different approaches, and what the current limitations are. Furthermore, an implementation of a virtual camera system is created which can be run on consumer graphics hardware. By merging geometries from different cameras, calculated with a stereo algorithm, a representation of the current scene can be rendered. The viewpoint can be changed by a user interactively in real-time.
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Shahbazi, Sasha, and Siavash Javadi. "Supporting production system development through Obeya concept." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-18130.
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Manufacturing Industry as an important part of European and Swedish economy faces new challenges with the daily growing global competition. An enabler of overcoming these challenges is a rapid transforming to a value-based focus. Investment in innovation tools for production system development is a crucial part of that focus which helps the companies to rapidly adapt their production systems to new changes. Those changes can be categorized to incremental and radical ones. In this research we studied the Obeya concept as a supporting tool for production system development with both of those approaches. It came from Toyota production system and is a big meeting space which facilitates communication and data visualization for a project team. Four lean companies have been studied to find the role of such spaces in production development. Results indicate a great opportunity for improving those spaces and their application to radical changes in production development projectsEXPRES
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Tomberg, Alexandre. "Entropy production of a Guassian dynamical system." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104774.
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We give a self-contained presentation of classical results pertaining to Gaussian random fields, geared toward the application to nonequilibrium statistical mechanics of a Gaussian dynamical system. We then provide results about the existence and the form of the entropy production observable, along with the conditions necessary for the nonequilibrium steady state to occur. Finally, we consider a model consisting of two infinite chains of harmonic oscillators at different initial temperatures. By applying the general results to this model, we prove the existence of a nonequilibrium steady state and compute the expectation of the entropy production observable of this system in the steady state. As expected, the result depends on the temperature difference between the two parts of the chain so that the heat flows from hot to cold and ceases if the initial temperatures were the same.Nous donnons une présentation indépendante de certains résultats classiques concernant les champs aléatoires gaussiens, orientée vers l'application à la mécanique statistique hors d'équilibre d'un système dynamique gaussien. Nous donnons ensuite des résultats sur l'existence et la forme de l'observable de production d'entropie, ainsi que les conditions nécessaires à l'état de non équilibre stable de se produire. Enfin, nous considérons un modèle composé de deux chaînes infinies d'oscillateurs harmoniques à températures initiales différentes. En appliquant les résultats généraux à ce modèle, nous prouvons l'existence d'un état de non équilibre stable et nous calculons l'espérance de l'observable de production d'entropie de ce système a l'état stationnaire. Comme prévu, le résultat dépend de la différence de températures entre les deux parties de la chaîne de sorte qu'il y ait un flux de chaleur du chaud au froid qui cesse si les températures initiales sont les mêmes.
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Pulec, Z., J. Stursa, O. Lebeda, V. Zach, and J. Ralis. "New gas target system for 83Rb production." Helmholtz-Zentrum Dresden - Rossendorf, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-165646.
Full textAbstract:
Introduction
Short-lived isomer 83mKr (T½ = 1.83 h) is an ideal calibration source in several low-energy experiments like or KATRIN (determining the neutrino rest mass, monitoring high voltage stability and investigation of the main spectrometer properties) or XENON (detection of the dark matter).
The isomer 83mKr is formed by decay of 83Rb (T½ = 86.2 d) that can be produced predominantly via the reaction 84Kr(p,2n)83Rb by irradiation of natKr (57 % abundance of 84Kr).
The design and construction of the new gas target for effective production of radionuclide 83Rb as well as target processing will be shortly described.
Material and Methods
For the target design, we selected the following criteria: minimizing activation of target components; efficient cooling system allowing higher beam currents; easy handling; high life-time of the target chamber (low impact of the irradiation and radionuclide separation process on the target chamber surface and 83Rb recovery).
The target consists of three parts:
1. Water cooled aluminium (alloy EN 6082) mechanical interface for easy connection of the target to the beam line. It also serves as a beam collimator (diameter 9 mm).
2. Holder of He-cooled foils (vacuum separation foil – Havar 0.025 mm, target body window – Ti 0.1 mm).
3. Aluminium (alloy EN 6082) water cooled target body with 150mm long cone-shaped target chamber of the volume 27.1 ml. Internal surface of the chamber is nickel-coated.
The target filled with natural Kr of purity 0.9999 and absolute pressure 13 bar was irradiated on the external beam of the isochronous cyclotron U-120M of the NPI AS CR. The proton beam energy was set so that it is decreased after deg-radation in the separation foils to 25.6 MeV. Beam energy loss in the natural Kr gas filling is 9.6 MeV. The target was tested up to 25 µA beam current.
After irradiation, the target is left for a week to let the short-lived activation products to decay. Then, 83Rb is washed out from the target walls by two portions of freshly prepared de-ionized water, target is rinsed by high-purity ethanol and dried. The two portions of 83Rb aqueous solution are then connected and activity and radionuclidic purity of the product is determined via γ-spectrometry (HPGe detector). Large-distance sample-detector measurements of the target prior and after the separation are used in order to determine recovery of 83Rb.
Results and Conclusion
The new gas target for routine production of 83Rb was successfully designed, tested and im-plemented for regular 83Rb production. Six-hour irradiation with 15 µA proton beam resulted repeatedly in ca 300 MBq of 83Rb (EOB). Besides 83Rb, we identified in the separated product also 84Rb (T½ = 32.82 d) at levels ca 31 % of the 83Rb activity (EOB) and 86Rb (T½ = 18.631 d) at levels ca 8 % of the 83Rb activity (EOB). Both radionuclidic impurities do not disturb the use of 83Rb, since none of them emanates any radioactive krypton isotope. Moreover, their relative content decreases in time. Rubidium isotopes are recovered from the target almost quantitatively (98–99 %).
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Wills, Ciaran. "A video summarisation system for post-production." Thesis, University of Glasgow, 2003. http://theses.gla.ac.uk/5606/.
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Post-production facilities deal with large amounts of digital video, which presents difficulties when tracking, managing and searching this material. Recent research work in image and video analysis promises to offer help in these tasks, but there is a gap between what these systems can provide and what users actually need. In particular the popular research models for indexing and retrieving visual data do not fit well with how users actually work. In this thesis we explore how image and video analysis can be applied to an online video collection to assist users in reviewing and searching for material faster, rather than purporting to do it for them. We introduce a framework for automatically generating static 2-dimen- sional storyboards from video sequences. The storyboard consists of a series of frames, one for each shot in the sequence, showing the principal objects and motions of the shot. The storyboards are rendered as vector images in a familiar comic book style, allowing them to be quickly viewed and understood. The process consists of three distinct steps: shot-change detection, object segmentation, and presentation. The nature of the video material encountered in a post-production fa- cility is quite different from other material such as television programmes. Video sequences such as commercials and music videos are highly dy- namic with very short shots, rapid transitions and ambiguous edits. Video is often heavily manipulated, causing difficulties for many video processing techniques. We study the performance of a variety of published shot-change de- tection algorithms on the type of highly dynamic video typically encoun- tered in post-production work. Finding their performance disappointing, we develop a novel algorithm for detecting cuts and fades that operates directly on Motion-JPEG compressed video, exploiting the DCT coeffi- cients to save computation. The algorithm shows superior performance on highly dynamic material while performing comparably to previous algorithms on other material.
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Bruce, David William. "Optimising broiler production using a computerised system." Thesis, Queen's University Belfast, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335342.
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Ballard, Herman Glenn. "The last planner system of production control." Thesis, University of Birmingham, 2000. http://etheses.bham.ac.uk//id/eprint/4789/.
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Project controls have traditionally been focused on after-the-fact detection of variances. This thesis proposes a control system, the Last Planner system, that causes the realization of plans, and thus supplements project management’s concern for management of contracts with the management of production. The Last Planner system has previously been successfully applied by firms with direct responsibility for production management; e.g., specialty contractors. This thesis extends system application to those coordinating specialists, both in design and construction, through a series of case studies, one of which also explores the limits of unilateral implementation by specialists. In addition to the extended application, two questions drive this research. The first question is 1) What can be done by way of tools provided and improved implementation of the Last Planner system of production control to increase plan reliability above the 70% PPC level? Previous research revealed substantial improvement in productivity for those who improved plan reliability to the 70% level, consequently there is reason to hope for further improvement, possibly in all performance dimensions, especially with application across an entire project rather than limited to individual specialty firms. That question is explored in three case studies, the last of which achieved the 90% target. The second question is 2) How/Can Last Planner be successfully applied to increase plan reliability during design processes. That question is explored in an extensive case study, which significantly contributes to understanding the design process from the perspective of active control, but unfortunately does not fully answer the question, primarily because the project was aborted prior to start of construction. However, it is argued that Last Planner is especially appropriate for design production control because of the value-generating nature of design, which renders ineffective traditional techniques such as detailed front end planning and control through after-the-fact detection of variances. Issues for future research are proposed, including root cause analysis of plan failures and quantification of the benefits of increased plan reliability for both design and construction processes.
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Schanzenberger, Anja. "System design for periodic data production management." Thesis, Middlesex University, 2006. http://eprints.mdx.ac.uk/10697/.
Full textAbstract:
This research project introduces a new type of information system, the periodic data production management system, and proposes several innovative system design concepts for this application area. Periodic data production systems are common in the information industry for the production of information. These systems process large quantities of data in order to produce statistical reports in predefined intervals. The workflow of such a system is typically distributed world-wide and consists of several semi-computerized production steps which transform data packages. For example, market research companies apply these systems in order to sell marketing information over specified timelines. production of information. These systems process large quantities of data in order to produce statistical reports in predefined intervals. The workflow of such a system is typically distributed world-wide and consists of several semi-computerized production steps which transform data packages. For example, market research companies apply these systems in order to sell marketing information over specified timelines. There has been identified a lack of concepts for IT-aided management in this area. This thesis clearly defines the complex requirements of periodic data production management systems. It is shown that these systems can be defines as IT-support for planning, monitoring and controlling periodic data production processes. Their significant advantages are that information industry will be enabled to increase production performance, and to ease (and speed up) the identification of the production progress as well as the achievable optimisation potential in order to control rationalisation goals. In addition, this thesis provides solutions for he generic problem how to introduce such a management system on top of an unchangeable periodic data production system. Two promising system designs for periodic data production management are derived, analysed and compared in order to gain knowledge about appropriate concepts and this application area. Production planning systems are the metaphor models used for the so-called closely coupled approach. The metaphor model for the loosely coupled approach is project management. The latter approach is prototyped as an application in the market research industry and used as case study. Evaluation results are real-world experiences which demonstrate the extraordinary efficiency of systems based on the loosely coupled approach. Special is a scenario-based evaluation that accurately demonstrates the many improvements achievable with this approach. Main results are that production planning and process quality can vitally be improved. Finally, among other propositions, it is suggested to concentrate future work on the development of product lines for periodic data production management systems in order to increase their reuse.
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Greco, Michael P. "Sequencing policy for a CONWIP production system." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-08292008-063311/.
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Rose, Sebastian. "The flexibility of the language production system." Doctoral thesis, Humboldt-Universität zu Berlin, Lebenswissenschaftliche Fakultät, 2016. http://dx.doi.org/10.18452/17640.
Full textAbstract:
Die Auswahl eines passenden Wortes aus semantisch verbundenen Wettbewerbern ist eine wesentliche Funktion der Sprachproduktion. Neuere strittige Befunde scheinen traditionellen lexikalischen Selektionsmodellen zu widersprechen. Der swinging lexical network (SLN) Ansatz offeriert eine kompetitiven Bezugsrahmen, der spezifische Voraussetzungen formuliert, unter denen semantische Erleichterungs- als auch Interferenzeffekte in Bildbenennungsparadigmen beobachtet werden können. Diese spezifischen Voraussetzungen betreffen a) die Manipulation eines Trade-offs zwischen konzeptueller Erleichterung und lexikalischer Interferenz, b) das Ausmaß an lexikalischer Kohortenaktivierung und c) die flexible Anpassungsfähigkeit des Sprachproduktionssystems. Die Trade-off-Annahme wurde durch Einflüsse von Assoziationen auf die Benennungslatenz untersucht (Studie 1), wenn Stimuli im kontinuierlichen Benennungsparadigma in einer scheinbar zufälligen Reihenfolge benannt werden. Information über den Einfluss lexikalischer Kohortenaktivierung auf die Wortproduktion wurde durch Manipulation semantischer Distanz und durch Kombination des kontinuierlichen Benennungsparadigmas mit ereignis-korrelierten Potentialen (EKPs) gewonnen (Studie 2). Zur Überprüfung der Flexibilitätsannahme werden Benennungslatenzen von Homophonen mittels Bild-Wort-Interferenzparadigma untersucht, nachdem Versuchspersonen wiederholt linguistische Mehrdeutigkeit verarbeiten haben (Studie 3). Die Ergebnisse zeigen semantische Interferenzeffekte für assoziativ und für eng kategorial verbundene Stimuli im kontinuierlichen Benennungsparadigma (Studie 1 & 2) und Erleichterungseffekte für Homophone im PWI, nachdem das kognitive System sich auf Mehrdeutigkeit adaptiert hatte (Studie 3). Eng kategorial verbundene Stimuli modulierten EKP-Komponenten in der P1, zwischen 250 und 400 ms und im N400-Zeitfenster, welche mit Wortproduktions-prozessen in Verbindung gebracht werden.The selection of an appropriate word from other meaning-related competitors is a main function of language production. Recent inconclusive findings have casted doubt about traditional lexical selection accounts. The swinging lexical network (SLN) account presents a competitive framework that formulates specific conditions under which semantic facilitation or interference effects can be observed in picture naming paradigms. These specific conditions concern a) the manipulation of the trade-off between conceptual facilitation and lexical interference, b) the extent of lexical cohort activation and c) the flexible nature of the language production system. The trade-off assumption was assessed by investigating the impact of associations on naming latencies in the continuous naming paradigm in which semantically related items are named within a seemingly random sequence (Study 1). Information for the understanding of lexical cohort activation on word production was obtained by manipulating semantic distance in the continuous naming paradigm combined with event-related potentials (ERP; Study 2). Aiming at testing the flexibility assumption, effects of unrelated meaning alternatives of homophones in a picture-word interference (PWI) paradigm were investigated, after participants repeatedly processed linguistic ambiguities (Study 3). Results show semantic interference for associates and for closely related category co-ordinates in the continuous naming paradigm (Study 1 & 2), and facilitation effects for homophone names in the PWI after the cognitive system adapted to the processing of linguistic ambiguities (Study 3). Closely related stimuli modulated ERPs in the P1, between 250 and 400 ms, and in the N400 time window, which are known to be associated with single word naming processes. These results support the SLN model and enhance the understanding of semantic and cognitive factors that shape the microstructure of language production.
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Mytrofanova, A. S. "Role of technological mode of production in transforming relations of production." Thesis, НТУ "ХПИ", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/16214.
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Dunkler, Olaf. "Human aided control of a flexible machining system." Thesis, Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/25663.
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Neves, Pedro. "System Evaluation and Learning in Evolvable Production Systems : Preliminary considerations and research directions." Licentiate thesis, KTH, Industriell produktion, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-107772.
Full textAbstract:
Dynamicity and unpredictability related to markets is strongly hardening companies’ mission to follow them and satisfy customer needs mainly due to the lack of adequate engineering mechanisms. These effects are felt more intensively in markets where low volumes and high customisation are needed since this requires constant changes in systems that can range from simple setups to total line re-configuration and re-programing. State of the Art Industrial technology has historically been driven to achieve very efficient and flexible production lines for pre-thought problems; however this technology doesn’t satisfy the needs faced by current production requirements where adaptability and responsiveness are off the essence. The last decade witnessed the advent of Evolvable Production Systems (EPS) and other modern paradigms that offer promising approaches to substitute obsolete production strategies. EPS enhances system re-configurability using process-oriented modularity and multi-agent based distributed control endowing the system with units that are autonomous, self-organizing and functionality-oriented. The aggregation of these independent units will then form a system that with a well-defined system architecture and interactions rules can collaborate to complete production plans and react to unpredictable events without re-programing needs. The complexity associated with combinatorial possibilities of forming a system based in such premises raises the need to study how such system performance can be evaluated and how machine learning can be used to discover best system configurations for specific cases. This thesis goal is to enlighten the relation between EPS characteristics, Evaluation and Learning building the foundations for the achievement of Evaluation and Learning mechanisms that can contribute to better system design and configuration to improve system performance and autonomy, and contribute to a more economical solution.QC 20121218
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Matz, Thomas W. "A decision support system for synchronizing manufacturing in a multifacility production system." Ohio : Ohio University, 1989. http://www.ohiolink.edu/etd/view.cgi?ohiou1182444606.
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Arnesson, Fredrik, and Johan Bengtsson. "Usability Evaluation of a Production System Development Framework : A Meta-Study Performed on the Use of a Production System Development Framework in the Development of a New Production System at Xylem." Thesis, Högskolan i Jönköping, Tekniska Högskolan, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-19202.
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Today’s competitive global market has placed companies under great pressure and the focus on production systems has been more prominent. Although there are several claimed benefits with using frameworks in the development of production systems, companies are reluctant to use these. Consequently, a relevant question formulation is: Are frameworks in the development of production systems usable? The purpose with this thesis work was therefore to evaluate the usability of production system development frameworks (PSDFs) in practice. In order to achieve this purpose, two research questions were established: RQ1. How can usability of frameworks be evaluated? RQ2. How does the use of a framework contribute to the development of a new production system? In order to answer the posed research questions, Bellgran and Säfsten’s PSDF was used in the production system development (PSD) process of a new production system at Xylem. Based on the PSD process, a meta-study was performed to evaluate the practical usability of the PSDF. Usability was defined and evaluated based on the five usability terms learnability, memorability, efficiency, effectiveness, and satisfaction. The result showed that all the five usability terms contribute to the usability evaluation of PSDFs. However, memorability was considered difficult to use on only one study since the user has to think a step further and make a qualified guess to answer if it is possible to memorize a framework. Therefore, it was considered memorability is only appropriate to use in a multiple study. The results also showed that Bellgran and Säfsten’s PSDF contributed most in the beginning of the PSD process by putting emphasis on the planning phase and providing a structure to follow. Due to the nature of a framework (i.e., to serve as a guide for structures to follow), this was not unexpected. However, the contributions from a structure or plan are hard to exactly distinguish. Since companies most often want tangible and accurate evidences, frameworks’ vague contributions are considered to be a major reason to why companies do not use frameworks more frequently.
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Pankow, Marcus. "Component-based digital movie production a reference model of an integrated production system." Wiesbaden Gabler, 2006. http://d-nb.info/980856914/04.
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Fugate, Jeremiah S. "LEAN FIRE MANAGEMENT: A FOCUSED ANALYSIS OF THE INCIDENT COMMAND SYSTEM BASED ON TOYOTA PRODUCTION SYSTEM PRINCIPLES." UKnowledge, 2014. http://uknowledge.uky.edu/me_etds/49.
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A primary role of the Incident Command System is to learn from past incidents, as illustrated by its origins in the wildland firefighting community. Successful emergency response operations under the Incident Command System has prompted its nationwide spread, this promulgation critically relies on the system’s capability to stabilize and continuously improve various aspects of emergency response through effective organizational learning. The objective of this study is to evaluate the potential to apply fundamental principles of the Toyota Production System (Lean manufacturing) to improve learning effectiveness within the Incident Command System. An in-depth review of literature and training documents regarding both systems revealed common goals and functional similarities, including the importance of continuous improvement. While these similarities point to the validity of applying Lean principles to the Incident Command System, a focus on the systematic learning function of the Incident Command System culminated in the discovery of gaps in approaches proposed by the Incident Command System framework. As a result, recommendations are made for adjustments in systematic problem solving to adapt Lean principles of root cause analysis and emphasis on standardization of successful countermeasures to benefit the system. Future recommendations are also proposed based on the author’s understanding of the system.
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Liao, Jen-Hao, and 廖仁豪. "System Simulation of Leveling Production in Toyota Production System." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/07107160933178562416.
Full textAbstract:
碩士國立雲林科技大學
工業工程與管理研究所碩士班
91
The meaning of Just-In-Time (JIT) is to produce the necessary amount of product at the necessary time in order to fit the market demands of small amount and large variety. The leveling production of JIT is the technique to meet this kind of demand. The leveling production is achieved through roughly adjusting the monthly demand and fine adjusting the daily demand. However, the leveling production degree will affect the operation performance of a manufacturing system. It is important to investigate the affect leveling production degree on the operation performance. Unfortunately, literature reviews show that just a few researches investigate the leveling production degree. The objective of this research is to investigate the affect of leveling production degree on Toyota production system (TPS) performance by a dynamic simulation model. This research finds that the selection of the leveling production degree is not an optimization problem, but a trade-off problem. The selection of the better leveling production degree depends on the decision-maker’s business philosophy and valve criteria. A company that adopts the TPS will make its decision based on the smallest work-in-process (WIP). Under this condition, a higher degree of leveling production, smaller set-up time and fewer product defect rate will be. Suggested to use in the TPS.
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Vyas, Kewalkumar Chandrakant. "Toyota production system." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-08-4290.
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Background: There are various manufacturing methods and systems in automobile
industries throughout the world. Of these, many practice lean manufacturing methods.
The most effective and influential to all of these methods is the “Toyota Production
System” (TPS). The TPS was invented by Toyota's founding fathers in 1930 in Japan. The
TPS continuously evolves making it a benchmark for the manufacturing, product
development or any other sector of industry. It is fully based on “Socio-Technical”
systems in a continuously changing manufacturing environment. It is about learn
through doing and also about tacit knowledge and not explicit procedural knowledge.
Outcome: The Toyota Production System is called “The Toyota Way” and it actually
gives you a roadmap or more of a compass to set your direction and helps you steer
your own course. Toyota has internally developed simple but effective tools and
consistently trains their team members to implement those in all aspects of
manufacturing and designing their vehicle. For example, Toyota has developed Kaizen or
continuous improvement through which they eliminate waste that adds cost without
adding value no matter how small it is.
Toyota is known for the quality of their products. Not surprisingly their product is made
at a significantly lower price within a given segment of the auto market. It is a result of
hard work, innovation, and a Japanese work culture of generations at Toyota all across
the world.
Conclusions: Through theoretical analysis backed by my personal observations as an
employee and from the sales figures of Toyota automobiles, I firmly believe that Toyota
backs up its philosophy of long term benefits over short term financial goals. The right
processes will produce right results. It is also one of the top companies among their
group of long term suppliers as Toyota challenges them and helps them to improve.
Initial quality and customer satisfaction surveys of J.D.Powers and Associates for Toyota
and Lexus vehicles have won numerous awards since 2001.text
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Hsu, Ting-Wei, and 許庭瑋. "System dynamics simulation analysis of semiconductor production systems." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/48652064862573447396.
Full textAbstract:
碩士逢甲大學
工業工程與系統管理學系
102
In the semiconductor wafer manufacturing industry, besides continuous improvement of wafer fabrication ability, capacity and equipment, work in-process control is needed to production performance improvement and manufacturing costs reducing. First we study the production processes of semiconductor wafer industry, identify bottleneck stations, and study the causal relationship between the WIPs at bottleneck stations and other relevant variables. This study uses system dynamics simulation method to construct dynamic models of bottleneck stations in semiconductor production system, and then executes simulation software to scenario analysis. In this study, under the influence of the deviations of production plan and the changes in batch size to find the amount of change in the case of WIP at the bottleneck. The results, indeed, show that the dynamic mode semiconductor system constructed control the amount of WIPs effectively in order to achieve better production performance in this thesis. Supervisors can establish appropriate production parameters by using the dynamic simulation model constructed in this study.
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Hung, Wen-Pin, and 洪文斌. "Automated production system development." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/2g4zvn.
Full textAbstract:
碩士國立中正大學
機械工程系研究所
105
In the past, there were two common problems with automation system integration. The first one is to perform spot check during the generating process which usually causes defected items. The defected items must be discarded. The second one is to increase the yield rate which was not been improved during the past years. In order to resolve the problems, this study tried to establish a positioning measurement platform. At the same time, I developed the visual positioning system with laser measurement The hardware and software are built for off-line measurement compensation during rim finishing process. I tried to analyze the best nipping point and performed error compensation for processing, and thus the yield rate can be enhanced. The development process can be divided to 3 parts. First, I used visual identification, servo control systems and human-machine interface software technology to complete the automatic positioning system. Second, the laser ranging with linear motor control system, data analysis and CNC communication is used to find out the best product nipping point of the raw material. Third, I used laser ranging to analyze finished product, completed the relevant tool data compensation and finished product inspection. In addition, with a large amount of data collection and analysis, the data could be used to further improve the process, and enhance the yield rate.
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Ou, Chihming, and 歐智明. "Analysis of Historical Production Data- Production Materials Recommendation System." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/x4se39.
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碩士元智大學
資訊管理學系
105
The production environment in the automation industry is based on ETO (Engineering-to-Order). Manufacturers are required to perform design and produce equipment in compliance with customer’s functional requirements within lead-time after receiving a purchasing order. Under such a circumstance where fierce competition is taking place and profit margin is being pushed down, more precise controls on time, cost, flexibility, and quality become necessary. Time, quality and flexibility have been indispensable, while cost has been the only source of profit. Thus, how can the lead time be shortened and cost be reduced by means of historical data analysis have been a critical goal in production management nowadays. The fundamental framework of this study comprises two phases. The first phase adopts text mining to carry out engineering BOM (Bill of Material) and process analysis to obtain effective key features, which quickly determines the production process of materials and suppliers, while the second phase analyzes material costs through Linear Regression, BPNN (Back Propagation Neutral Network), and SVR (Support Vector Machine for Regression), and is expected to generate more convincing material cost forecasts through a combination and verification of multi algorithms. The objective of this study aims at shortening the original lead time and operation process of request for material quotation and proposing cost forecasts by Linear Regression analysis, thereby resolving the waste of time in the course of request for quotation (RFQ), which can effectively minimize the time for RFQ and enhance the correctness of cost forecasts.
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Tseng, Chien Ming, and 曾建銘. "Ant Colony System Approach for Production Scheduling System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/39397183169864448418.
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碩士國立屏東科技大學
工業管理系所
98
The domestic large size TFT-LCD makers will transfer their fifth generation factories to small size panel production gradually. But small size TFT-LCD production has the characteristic of producing large varieties and yet in small quantities, lead to a highly complex production environment. When TFT-LCD maker is under resources limitation, how to improve and minimize the bottleneck effect on each production station and have proper planning for each various production will require of various product lines, Making the production maximizing and efficiency will be the biggest challenge for TFT-LCD makers. The necessary time for solving planning problem will depend the problem size and grow up of exponential type. When problem scope is smaller, we can use general mathematic plan method to get the best solution. But when larger problem scope, it usually need more time to get solution. This research will apply group technology to group same type orders and reduce problem scope, then use ant colony optimization (ACO) model to solve planning problems of bottleneck station.
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Hong, KAI-ZHI, and 洪楷智. "Automated production system for curtains." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/ya2252.
Full textAbstract:
碩士國立雲林科技大學
機械工程系
105
The policies of automated production have been promoted actively by the government in recent years and the traditional industries have been encountered with the shortage of the manpower, so the automated production is developed to solve the above problems. Due to the complicated packaging process of pleated shades, the production is all completed by the manual operation. It is necessary to take more time and manpower to achieve the demands of customers. In view of the above, an automated production system for curtains has been developed in this investigation. Pneumatic cylinder-type of the platform, servo motor and SCARA are integrated with the packaging machines and are connected to the PLC to realize the purpose of automated production. According to the testing results, the automated production system has realized three goals as the following description. The packaging time of curtains can be controlled within 8 seconds per pack, 60% manpower can be reduced and 25% production is increased.