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Huschka, Kyle. "Using statistical process control to monitor inventory accuracy." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1407.
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Bai, Sherman Xiewei. "Scheduling manufacturing systems with work-in-process inventory control." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/13477.
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Hollis, William J. Estep Anthony S. Walker Nicholas T. "Squadron movements and associated transportation problems an inner look into the process /." Monterey, Calif. : Naval Postgraduate School, 2008. http://edocs.nps.edu/npspubs/scholarly/MBAPR/2008/Dec/08Dec%5FHollis%5FMBA.pdf.
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"Submitted in partial fulfillment of the requirements for the degree of Master of Business Administration from the Naval Postgraduate School, December 2008."<br>Advisor(s): Ferrer, Geraldo ; Apte, Aruna. "December 2008." "MBA professional report"--Cover. Description based on title screen as viewed on January 28, 2009. Includes bibliographical references (p. 95-96). Also available in print.
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Karlsson, Per-Johan, and Mariana Porto. "Improving the control of work-in-process at VSM Group AB." Thesis, Jönköping University, JTH, Industrial Engineering and Management, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1302.
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<p>Today many companies face problems with inventory management. The importance of adequate inventory management has become more evident, while organizations try to reduce their costs and increase their service level.</p><p>This master thesis was conducted at VSM Group AB in Huskvarna, which is a manufacturer that produces and delivers sewing machines to a worldwide market. VSM Group AB has problems with the management and the refilling of the work-in-process (WIP) inventories and also with lack of information about component balance and location in the production and material planning system.</p><p>Therefore, the purpose of the thesis was to improve the control of the WIP inventories and the information about the components in the production and material planning system. In order to achieve the purpose, interviews and observations were performed, theories in inventory management were reviewed and the production process was studied.</p><p>Afterwards solutions for improvements were proposed. To solve the management and refilling problem, a kanban ordering system was proposed, which would use kanban cards to order components from the storages to the WIP inventories. To develop the component information displayed in the production and material planning system, an additional feature was proposed to the system. So instead of showing one inventory balance for each component, the system would display balances for three different places in the factory: the goods arrival and quality control area, the storage and the production.</p><p>The proposed solutions can provide several benefits to the company. The kanban ordering system can increase the material handlers’ efficiency, set a standard refilling quantity and be a tool for reducing the WIP inventory levels. The more detailed information in the production and material planning system can improve the decision making for the purchasers and planners and give the ability to measure the flow and level of material inside the factory.</p><p>These solutions will provide a more appropriate inventory management to the company, with better control of the components and improved information quality.</p>
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Dexter, Mark D. "Initial research on an inventory control process for low attrition repairable items." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/27097.
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Bai, X., and Stanley B. Gershwin. "Scheduling Manufacturing Systems With Work-in-Process Inventory Control: Single-Part-Type Systems." Massachusetts Institute of Technology, Operations Research Center, 1990. http://hdl.handle.net/1721.1/5362.
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In this paper, a real-time feedback control algorithm is developed for scheduling single-part-type production lines in which there are three important classes of activities: operations, failures, and starvation or blockage. The scheduling objectives are to keep the actual production as close to the demand as possible, and to keep the level of work-in-process inventory as low as possible. By relating the starvation and blockage to the system capacity, the buffer sizes and the target buffer levels are chosen according to the demands and machine parameters. The processing time for each operation is deterministic. Failure and repair times are random. Whenever a machine fails or is starved or blocked, the scheduling system recalculates short term production rates. To begin with, we study a very simple case, a two machine and one part type system, to get insight into the buffer effects and production control policies. Using the relationship between system capacity and starvation or blockage, we find desirable buffer levels and buffer sizes. The production control policy is determined to meet the system performance requirements concerning low WIP inventory and tardiness. The results from the simple case are extended to N-machine, one-part-type systems.
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Guzman, Pamela, Franklin Montalvo, Edgardo Carvallo, and Carlos Raymundo. "Implementation of a process management model and inventory control to increase the level of service in the after-sales area of industrial equipment." Latin American and Caribbean Consortium of Engineering Institutions, 2019. http://hdl.handle.net/10757/656260.
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Currently, many industrial companies generate many losses in their after sales this is generated to an error in the control of inventories and in turn in a mishandling of their assets through their processes, therefore the present research proposes a management model of processes and control of inventories in order to reduce customer losses due to the large number of existing complaints and thus increase sales. Therefore, the process management model, which will contribute to the standardization, optimization and control of its critical processes, and for which indicators, procedures and policies will be proposed for each stage of the process in order to measure its efficiency and effectiveness for correct decision making. With respect to the control of inventories, it is proposed to make a segmentation of the products, which allows the identification of the most important products for the company, to then design a demand forecast model for families of products that will later be individualized considering their factors initial and finally using an inventory management model will obtain the optimal quantity of spare parts order to use in the technical service of the equipment reducing the annual costs related to the inventory.
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Alvino, Ganoza David Daniel, Martínez Kristty Magaly Huamaní, Serva José Miguel Quispe, and Luján David Verde. "Propuesta de implementación de un modelo de gestión que optimice los niveles de inventarios en un almacén de una empresa de distribución eléctrica." Master's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/648675.
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En la presente investigación se sustenta una propuesta de implementación de un modelo de gestión de inventarios, aplicado a una empresa dedicada a la distribución eléctrica en una de las más importantes ciudades del sur del Perú. Los principales objetivos son: Reducir los costos originados debido al sobre stock de inventario, reducir el riesgo de roturas de stock con la consecuente imposición de penalizaciones por parte del ente regulador y adicionalmente establecer un procedimiento para la disposición final de los materiales obsoletos y deteriorados que resultan de la operación de la empresa.<br>This research supports a proposal for the implementation of an inventory management model, applied to a company dedicated to electricity distribution in one of the most important cities in southern Peru. The main objectives are: To reduce the costs originated due to the stock of inventory, reduce the risk of stock breakage with the consequent imposition of penalties by the regulatory entity and additionally establish a procedure for the final disposal of obsolete and deteriorated materials that they result from the operation of the company.<br>Tesis
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Kriguer, Henrique. "Classificação multicritério de peças de reposição /." Guaratinguetá, 2015. http://hdl.handle.net/11449/134253.
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Orientador: Valério Antônio Pamplona Salomon<br>Banca: José Roberto Dale Luche<br>Banca: Mischel Carmen Neyra Belderrain<br>Resumo: O gerenciamento de estoques torna-se cada vez mais importante em função da necessidade de aperfeiçoamento da eficiência na cadeia logística, que se traduz na redução de custos e aumento do nível de serviço. A literatura sobre o gerenciamento de estoques de peças de reposição é ampla, porém é pouco abordada em relação à escolha do modelo de classificação. Neste trabalho, o método Analytic Hierarchy Process (AHP) foi aplicado em uma Empresa de bens de capital para determinar o vetor de prioridade dos critérios adotados para a classificação de peças de reposição. Apresentamos, com base no resultado deste estudo o Índice de Reposição, que foi adotado como um fator de correção nos valores de estoque segundo a classificação ABC. O objetivo foi atingido com o aperfeiçoamento do método de classificação, tornando o trabalho do planejador de estoques melhor estruturado, permitindo que possa tomar a decisão de reabastecimento de forma estruturada conforme parâmetros pré estabelecidos<br>Abstract: The inventory management becomes increasingly important due to the need for improved efficiency in the supply chain, which translates into cost savings and increased service level. The literature on the management of spare parts inventory is wide, but is rarely addressed in relation to the choice of classification model. In this work, the Analytic Hierarchy Process (AHP) method was applied to a Company of capital goods to determine the priority vector of the criteria adopted for the spare parts classification. Here, based on the results of this study the Replacement Index, which was adopted as a correction factor in inventory values according to the ABC classification. The goal was achieved with the improvement of classification method, making the work of the best structured inventory planner, allowing can take the form of structured replenishment decision as pre-established parameters<br>Mestre
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Aigel, Radek. "Řízení průběhu zakázky organizací." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2009. http://www.nusl.cz/ntk/nusl-222010.
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This master’s thesis is aimed to improvement of the management of orders in ISMA Jevíčko L.t.d. Company. This company is interested in construction market. The thesis solves the theoretic basics and its implementation on company mentioned above. Further, there are new methods of company and order course management, suggested. For improvement of customer services I used outsourcing IS/IT, marketing outsourcing, ecological standards, TQM method and other useful science procedures.
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Drélichová, Stanislava. "Studie řízení průběhu zakázky firmou." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2007. http://www.nusl.cz/ntk/nusl-221414.
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This masterś thesis, titled as The Study of Order Process Control in Company Invensys Appliance Controls s.r.o., deals with optimization of order process from the first entering of new order till the delivery of finished goods to final customer. Further I provide the basic characteristics and analysis of Invensys Company. The project part is divided into two parts. The first one is focused on explaining of operation of Kanban system and itś possibility to improve the material flow in company. The second one is focused on long-term forecasts (demand predictions) provided by customers, which can help to improve the process of order as well. In conclusion, I appraise advantages and disadvantages of Kanban system and forecasts.
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Bonilla, Ramírez Kevin Antony, and Palacios Pedro Marcos. "Propuesta de mejora de los procesos de abastecimiento y despacho de productos utilizando metodología Lean Warehousing y la herramienta VRP para reducir el alto índice de devoluciones de una empresa de consumo masivo." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/653758.
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El presente trabajo de investigación tiene como objetivo reducir el índice de devoluciones de una empresa de consumo masivo. Se aplicó la metodología Lean Warehousing y la herramienta VRP para plantear una solución al problema. El proyecto se divide en cuatro capítulos. En el primer capítulo se desarrolla los conceptos y bases teóricas en las que se fundamenta la propuesta.
El segundo capítulo presenta el entorno de la empresa, los procesos realizados y los roles que desempeñan cada uno de los trabajadores. También, se identifica el problema a resolver, para ello se requirió utilizar como herramienta el árbol de decisiones para identificar las causas raíz, las cuales son explicadas y fundamentadas.
El tercer capítulo plantea 2 metodologías que ayudarán a resolver las 4 causas principales. La primera metodología consiste en determinar la ruta de transporte óptima y la segunda metodología plantea mejorar el abastecimiento y control de productos dentro del almacén. Finalmente, se presenta los costos de la implementación y los beneficios que se obtendrían con la implementación de las propuestas.
Por último, el cuarto capítulo se expone los resultados de la implementación con la finalidad de reducir el índice de devoluciones. Así como, la reflexión del proyecto y las recomendaciones para futuras investigaciones.<br>This research work aims to reduce the rate of returns of a mass consumption company. The Lean Warehousing methodology and the VRP tool were applied to propose a solution to the problem. The project is divided into four chapters. In the first chapter the theoretical concepts and bases on which the proposal is based are developed.
The second chapter presents the company's environment, the processes performed and the roles that each of the workers play. Also, the problem to be solved is identified, for this it was required to use the decision tree as a tool to identify the root causes, which are explained and substantiated.
The third chapter presents 2 methods to help resolve the 4 main causes. The first methodology consists in determining the optimal transport route and the second methodology proposes to improve the supply and control of products within the warehouse. Finally, the implementation costs and the benefits that would be obtained with the implementation of the proposals are presented.
Finally, the fourth chapter describes the results of the implementation in order to reduce the rate of returns. As well as, the reflection of the project and the recommendations for future research.<br>Trabajo de Suficiencia Profesional
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Regalado, Aguilar Rodrigo Alonso. "Propuesta de Diseño del Sistema de Plan de compras y Control de inventarios medicinales en una Clínica materno - infantil." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2017. http://hdl.handle.net/10757/626077.
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El proyecto de rediseño del sistema se ha realizado para mantener la operación activa y el flujo de medicamentos en la empresa. Si bien la farmacia o el almacén principal representa el 10% de los ingresos netos de la organización, es la principal área de apoyo para los principales servicios ofrecidos por la clínica a los clientes, ya que es responsable del suministro médico al consumidor interno y externo donde se interactúa con las actividades de la empresa.
La implementación del proyecto consistió en calcular los lotes óptimos para cada línea de productos que se agruparon para un mejor tratamiento de los medicamentos: 700 artículos a 50 familias. Las líneas de productos para aquellos con características similares se definieron y se pudieron comprar a un proveedor en particular. Además, se establecieron descuentos para reducir los niveles de precios en la farmacia. En relación con el control de stock, se estableció el Plan Cíclico basado en el análisis Multicriterio ABC.
Como parte del alcance del proyecto, se tomó una muestra con un nivel de confianza del 90% de la implementación del tipo de producto "A" total para aplicar durante 3 meses. En efecto, los pedidos de productos elegidos en el Plan Piloto cayeron del 80% al 12.5% de las ventas no atendidas por la falta de disponibilidad de existencias y los altos precios.
Los resultados se lograron con la implementación de nuevos procedimientos de POES que involucran a los responsables de las áreas de la Clínica.<br>The System redesign project has been done in order to maintain active operation and flow of medicines in the company. Although Pharmacy - or main warehouse - accounts for 10% of net income in the organization, it is the main area of support for the main services offered by the clinic to the customers, because it is responsible for the medical supply to consumer internal and external interacting with the activities of the company.
The implementation of the project was to calculate the optimal batch order for each product line, which were grouped for better treatment of medicines - 700 items to 50 families. Product lines for those with similar characteristics were defined and could be purchased from a particular vendor. Also, discounts were established to reduce the levels of prices in the pharmacy. In relation to stock control, counting Cyclical Plan based on analysis Multicriteria ABC was established.
As part of the project scope, a sample at 90% confidence level of total product type “A” implementation to apply for 3 months was taken. In effect, orders for products chosen in the Pilot Plan fell from 80% to 12.5% of sales not served by non-availability of stock and high prices.
The results were achieved with the implementation of new POES procedures involving those responsible for the areas in the Clinic.<br>Tesis
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Ortiz, Bailon Mariella Estefany, and Espino Rubén Javier Vera. "Propuesta de mejora para la gestión y control de producción de postes y accesorios de concreto utilizando la metodología Lean Manufacturing en una empresa concreter." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/657525.
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El presente proyecto de investigación tiene como objetivo reducir los diversos problemas que presenta el sector de construcción, específicamente las empresas concreteras, quienes ofrecen al mercado productos en base de concreto armado. Estos problemas impactan directamente en la rentabilidad y competitividad a nivel nacional. Por ello se considera necesario aplicar herramientas y metodologías de Ingeniería; con el fin de reducir costos operativos, penalidades por incumplimiento de pedidos y aumentar la competitividad. El problema identificado en este proyecto es la mala gestión y control de la producción, que incluye consecuencias directas con respecto a la calidad, planificación de operaciones y método de trabajo; generando principalmente sanciones por incumplimiento de pedidos, aumento de costos operativos y pérdida de costo de oportunidad que afectan negativamente la eficiencia del proceso de producción de postes y accesorios de concreto. Para ello, se propone la implementación de un modelo de mejora aplicando la filosofía Lean Manufacturing; cuya aplicación está enfocada a mejorar tres residuos principales en el sistema de producción: defectos, inventario y tiempo de espera. Las propuestas del estudio generaron una reducción de 6.46% productos defectuosos, una reducción de 9.50% en el indicador de penalidades, un incremento de 21% en la OEE de las máquinas y una reducción del 35% en el tiempo de ciclo. Además, se evidencio la reducción de un 1.81% en sobrecostos operativos, lo cual impacta en $30,199.<br>The propose of this research is to reduce several problems presented by the construction sector, specifically concrete companies, who offers reinforced concrete products to the market. These problems have a direct impact on profitability and competitiveness at the national level. For this reason, it is necessary to apply engineering tools and methodologies; in order to reduce operating costs, penalties for non-fulfillment of orders and increase competitiveness. The problem identified on this project is poor management and control of production, which includes direct consequences regarding quality, operations planning and work method; mainly generating penalties for non-fulfillment of orders, increased operating costs and loss of opportunity cost, which negatively affect the efficiency of the concrete poles and accessories production process. For this, the implementation of an improvement model is applying the Lean Manufacturing philosophy; whose application is focused on improving three main residues in the production system: defects, inventory and waiting time. The study proposals generated a 6.46% reduction in defective products, a 9.50% reduction in the penalty indicator, a 21% increase in OEE and a 35% reduction in cycle time. In addition, there was a 1.81% reduction in operating cost overruns, which affects $ 30,199.<br>Trabajo de Suficiencia Profesional
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Fang, Jianxin. "Analyse et algorithmes de résolution de systèmes ATO (Assemble-To-Order) : Applications aux systèmes du type W." Thesis, Ecole centrale de Lille, 2017. http://www.theses.fr/2017ECLI0012/document.
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Nous analysons un type W de système de l’Assemble-à-commande avec des délais de livraison aléatoires, l'arrivée aléatoire de la demande et des ventes perdues, en temps continu. Nous formulons le problème en tant que processus de décision Markov à l'horizon infini. Nous nous éloignons de l'approche standard en caractérisant une région de l'espace d'état où toutes les propriétés de la fonction de coût tiennent. Nous caractérisons la politique optimale dans cette région. En particulier, nous montrons que, dans l'intérieur de la région récurrente, les composants sont toujours produits. Nous caractérisons également la politique d'allocation de composants optimale qui spécifie si une demande de produit arrivant devrait être remplie. Notre analyse révèle que la politique d'allocation optimale est contre-intuitive. Par exemple, même lorsqu'un produit domine l'autre, en termes de coût/taux de vente perdue, sa demande peut ne pas avoir une priorité absolue par rapport à la demande de l'autre produit. Une telle caractéristique n'a pas été observée dans de nombreux paramètres intégrés de production/inventaire où l'allocation d'inventaire suit une priorité fixe pour satisfaire les exigences. Nous montrons également que la structure de la politique optimale reste la même pour les systèmes à production par lots, les temps de production répartis par Erlang et la demande de produits non unitaire. Enfin, nous proposons des heuristiques efficaces qui peuvent être utilisées comme substitut à la politique optimale ou peuvent être utilisées comme une politique de départ pour les algorithmes communs utilisés pour obtenir une politique optimale dans le but de réduire leur temps de calcul<br>We analyze a W-configuration assemble-to-order system with random lead times, random arrival of demand, and lost sales, in continuous time. We formulate the problem as an infinite-horizon Markov decision process. We deviate from the standard approach by first characterizing a region (the recurrent region) of the state space where all properties of the cost function hold. We then characterize the optimal policy within this region. In particular, we show that within the interior of the recurrent region components are always produced. We also characterize the optimal component allocation policy which specifies whether an arriving product demand should be fulfilled. Our analysis reveals that the optimal allocation policy is counter-intuitive. For instance, even when one product dominates the other, in terms of lost sale cost and lost sale cost rate (i.e., demand rate times the lost sale cost), its demand may not have absolute priority over the other product’s demand. Such a feature has not been observed in many integrated production/inventory settings where inventory allocation follows a fixed priority in satisfying demands. We also show that the structure of the optimal policy remains the same for systems with batch production, Erlang distributed production times, and non-unitary product demand. Finally, we propose efficient heuristics that can be either used as a substitute for the optimal policy or can be used as a starting policy for the common algorithms that are used to obtain the optimal policy in an effort to reduce their computational time
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Costa, Wilder Francisco Soares. "Aplicação do processo estocástico no controle de estoque em pequenas empresas." Universidade Federal de Goiás, 2014. http://repositorio.bc.ufg.br/tede/handle/tede/4674.
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Previous issue date: 2014-10-30<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>Inventory control plays an important role in business because they help the financial structure and understanding of it. Due to this fact is of great value that high school students seize their definitions and applications as they are or will be included in the labor market. The purpose of this work was to unite the inventory control with stochastic process, which in this case was the Markov process, through mathematical modeling. To this end, a brief explanation of inventory control and stock was addressed, as stochastic processes and examples, arriving on the Markov Chain that was addressed in a very simple way geared more for matrix multiplication and how to get these matrices. Then took these theories and applied, through modeling, at a small supermarket in inventory control of tomato sauce using Markov chains, allowing a prediction of future orders with the supplier. The work is the result of the Professional Masters and was written with the intention that teachers and high school students can understand the resolutions of the examples presented.<br>O controle de estoque exerce um papel importante nas empresas, pois auxiliam na estrutura financeira e compreensão da mesma. Devido esse fato é de grande valor que estudantes do ensino médio apreendam suas definições e aplicações pois estão ou serão inseridos no mercado de trabalho. O proposito deste trabalho foi unir o controle de estoque com o processo estocástico, que nesse caso foi o processo Markoviano, através da modelagem matemática. Para tanto, uma breve explanação de controle de estoque e estoque foi abordada, bem como processos estocásticos e exemplificações, chegando nas Cadeias de Markov que foi abordada de uma forma bem simples voltada mais para multiplicação de matrizes e como chegar nessas matrizes. Depois pegou essas teorias e foi aplicada, através da modelagem, em um supermercado de pequeno porte no controle de estoque de molho de tomate usando as cadeias de Markov, possibilitando a previsão de pedidos futuros junto ao fornecedor. O trabalho é fruto do Mestrado Profissional e foi escrito com intenção de que docentes e estudantes do ensino médio possam compreender as resoluções dos exemplos apresentados.
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Rioja, Levano Martin Reynaldo. "Propuesta para incrementar el nivel de servicio interno en el proceso de abastecimiento mediante el diseño de un sistema de control de inventarios y de la gestión de relación con los proveedores en una empresa del sector minero." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/652335.
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La presente tesis se centra en analizar las herramientas de ingeniería industrial que permitan incrementar el nivel de servicio interno en el proceso de abastecimiento logístico en una empresa del sector minero y con el entorno económico de los últimos 10 años. La hipótesis plantea la implementación de un sistema de control de inventarios y de la gestión de relación con los proveedores. El trabajo está compuesto de cuatro capítulos. En el primero se analizó el marco teórico y los casos de éxito. En el segundo, se abordaron temas como: antecedentes y procesos generales y logísticos de la organización, definición del problema y sus causas, el impacto económico y el planteamiento del objetivo general y específico. Por su parte, el tercer capítulo se dividió en dos etapas: la primera correspondiente al diseño de la metodología y en la segunda etapa el desarrollo de la propuesta. Finalmente, en el cuarto capítulo, se incluyó el presupuesto de recursos, el análisis financiero de riesgos y la elaboración del flujo de caja respectivo; asimismo, se validó la propuesta por medio de la simulación con el software ProModel.
Por lo expuesto, se concluye que, con la correcta elección del sistema de inventarios y una adecuada gestión de relación con los proveedores, se podrá incrementar el nivel de servicio interno en el proceso de abastecimiento logístico, con lo cual se logrará cumplir con un óptimo nivel de atención de repuestos de alta rotación, así como el cumplimiento en las entregas a tiempo para las compras con prioridad normal.<br>The present thesis focuses on analyzing industrial engineering tools that allow increasing the level of internal service in the logistics supply process in a company in the mining sector and with the economic environment of the last 10 years. he hypothesis raises the implementation of an inventory control system and supplier relationship management. The following work is made up of four chapters. In the first, the theoretical framework and success cases were analyzed. In the second, topics such as: background and general and logistical processes of the organization, definition of the problem and its causes, the economic impact and the approach of the general and specific objective were addressed. Consequently, the third chapter was divided into two stages: the first corresponding to the design of the methodology and the second to the development of the proposal. Nevertheless, in the fourth chapter, the resource budget, the financial risk analysis and the preparation of the respective cash flow were included; Likewise, the proposal was validated through simulation with the Promodel software.
Based on the foregoing, it is concluded that, with the correct selection of the inventory system and proper relationship management with suppliers, the level of internal service in the logistics supply process may be increased, thereby achieving optimum compliance level of attention of high rotation spare parts, as well as the fulfillment in the deliveries in time for the purchases with a normal priority.<br>Trabajo de Suficiencia Profesional
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Hudec, Jiří. "Studie optimalizace řízení zásob." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2007. http://www.nusl.cz/ntk/nusl-221448.
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This master´s thesis deals with problems of inventory control optimalization in a business company. It contains theory data, company analyses and its market position, an analysis of information systems and inventory control in use, its evaluation and own recommendation leading to the optimalization.
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Johnson, Mackie. "Retail Inventory Control Strategies." ScholarWorks, 2016. https://scholarworks.waldenu.edu/dissertations/3171.
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Despite using computerized merchandise control systems in retail, the rate of stockouts has remained stagnant. The inability to satisfy customer needs has caused a loss of 4% in potential revenue and resulted in dissatisfied customers. The purpose of this qualitative multiple case study was to explore cost-effective inventory control strategies used by discount retail managers. The conceptual framework that grounded the study was chaos theory, which helped identify why some business leaders rely on forecasting techniques or other cost-effective strategies as an attempt to prevent stockouts. The target population was comprised of discount retail managers located throughout northeast Jacksonville, Florida. Purposeful sampling led to selecting 6 retail managers who successfully demonstrated cost-effective inventory control strategies for mitigating stockouts. Data were collected through face-to-face semistructured interviews, company websites, and company documents. Analysis included using nodes to identify similar words and axial-coding to categorize the nodes into themes. Transcript evaluation, member checking, and methodological triangulation strengthened the credibility of the findings. Five themes emerged: (a) internal stockout reduction strategies, (b) external stockout reduction strategies, (c) replenishment system strategies, (d) inventory optimization strategies, and (e) best practices for inventory control. This study may contribute to positive social change by improving inventory management, which may reduce demand fluctuations in the supply chain and reduce logistics costs in the transportation of freight thereby leading to improved customer satisfaction.
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ASSIS, VINICIUS VALVERDE DE. "INVENTORY CONTROL USING KANBAN SYSTEM." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2010. https://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=17518@1.
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Esta dissertação apresenta o estudo e aplicabilidade dos conceitos do Just in
Time (JIT) e Kanban em modelos de gestão de estoques. O produtos são
suprimentos utilizados no processo de surfaçagem de lentes oftalmológicas de um
grande fabricante mundial. O trabalho foi desenvolvido no principal laboratório
que a empresa detém no Brasil, situado na cidade do Rio de Janeiro. O objetivo
foi elaborar uma proposta de controle de estoque de forma a garantir um bom
atendimento aos clientes com uma redução de estoque de suprimentos.<br>This thesis presents the study and applicability of the concepts of Just in
Time (JIT) and Kanban in models for inventory management. The products are
supplies used in the facing process of ophthalmic lenses of a large global
manufacturer. The study was conducted in the main laboratory that the company
owns in the country, located in the city of Rio de Janeiro, inside the distribution
center and attends strategic customers in the state. The objective was to develop a
proposed of inventory control to ensure to the best customers service with a
reduction of inventory of supplies.
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Yin, Tzu-Hsiao. "Multi-warehouse inventory control system." CSUSB ScholarWorks, 2006. https://scholarworks.lib.csusb.edu/etd-project/3102.
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The thesis discusses the development of Multi-Warehouse Inventory Control System (MWICS), a uniquely designed web application that targets membership based food wholesalers. The main goal of MWICS is to provide a real-time inventory control ability to all warehouses and present them as if it were single warehouse. The program consists of three main components: user account management sub-system, product and purchase management sub-system, and a warehouse inventory management sub-system. User interfaces are constructed primarily in HTML, PHP, and Javascript. MySQL is used to add, access, and process data.
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Cao, Jie. "Stochastic inventory control in dynamic environments." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011469.
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Chen, Xin 1973. "Coordinating inventory control and pricing strategies." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29598.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Sloan School of Management, Operations Research Center, 2003.<br>Includes bibliographical references (p. 127-130).<br>Traditional inventory models focus on effective replenishment strategies and typically assume that a commodity's price is exogenously determined. In recent years, however, a number of industries have used innovative pricing strategies to manage their inventory effectively. These developments call for models that integrate inventory control and pricing strategies. Such models are clearly important not only in the retail industry, where price-dependent demand plays an important role, but also in manufacturing environments in which production/distribution decisions can be complemented with pricing strategies to improve the firm's bottom line. To date, the literature has confined itself mainly to models with variable ordering costs but no fixed costs. Extending some of these models to include a fixed cost component is the main focus of this thesis. In this thesis, we start by analyzing a single product, periodic review joint inventory control and pricing model, and characterizing the structure of the optimal policy under various conditions. Specifically, for the finite horizon periodic review case, we show, by employing the classical k-convexity concept, that a simple policy, called (s, S, p), is optimal when the demand functions are additive. For the model with more general demand functions, we show that an (s, S, p) policy is not necessarily optimal. We introduce a new concept, the symmetric k-convex functions, and apply it to provide a characterization of the optimal policy. Surprisingly, in the infinite horizon periodic review case, the concept of symmetric k-convex functions allows us to show that a stationary (s, S, p) policy is optimal for both discounted and average profit models even for general demand functions.<br>(cont.) Our approach developed for the infinite horizon periodic review joint inventory control and pricing problem is then extended to a corresponding continuous review model. In this case, we prove that a stationary (s, S, p) policy is optimal under fairly general assumptions. Finally, the symmetric k-convexity concept developed in this thesis is employed to characterize the optimal policy for the stochastic cash balance problem.<br>by Xin Chen.<br>Ph.D.
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Moreno, Victoria, and Ahmed Yusef Ahmed. "Inventory control and organization of warehouse." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-12799.
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Bai, Liwei. "Inventory control and demand distribution characterization." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-02032005-114800/unrestricted/bai%5Fliwei%5F200505%5Fphd.pdf.
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Thesis (Ph. D.)--Industrial and Systems Engineering, Georgia Institute of Technology, 2005.<br>Paul Griffin, Committee Member ; Kwok-Leung Tsui, Committee Chair ; Christos Alexopoulos, Committee Co-Chair ; Hengqing Ye, Committee Co-Chair ; David Goldsman, Committee Member. Vita. Includes bibliographical references.
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Lam, Chi-lap. "Analysis of inventory systems with demands met either from inventory or by special deliveries /." [Hong Kong] : University of Hong Kong, 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12359907.
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García, Salcedo Carlos Andrés. "Inventory Control in Supply Chains: An Internal Model Control Approach." Doctoral thesis, Universitat Autònoma de Barcelona, 2013. http://hdl.handle.net/10803/116201.
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Esta tesis se basa en el diseño de estrategias de gestión de inventario en cadenas de suministro usando la teoría de control. El principal objetivo es proponer un esquema de control para resolver los principales problemas que aparecen en el controla gestión de inventario de una cadena de suministro (incertidumbre en el retardo, el efecto látigo y el déficit de inventario). Este objetivo principal se divide en dos objetivos:
1. La neutralización de los efectos causados por el retardo de entrega de un pedido.
2. Diseño de políticas de inventario que permitan un balance entre el rechazo a la perturbación (demanda) y el seguimiento del inventario objetivo.
Dado que el esquema de control por modelo interno (IMC) permite tratar los objetivos (1) y (2) bajo el mismo paradigma de control, pero de una manera disociada, éste se presenta en esta tesis como una nueva política de reposición de inventario en cadenas de suministro. Sin embargo, el IMC requiere el conocimiento del retardo para compensar sus efectos. Esta situación no es viable cuando el retardo cambia durante el proceso, situación común en las cadenas de suministro. Por lo tanto, la investigación empieza con la identificación del retardo. Así, en esta tesis se formula un algoritmo de identificación que permite estimar el verdadero valor de los retardos de la cadena de suministro. Estos valores se utilizan para adaptar el bloque de retardos en el esquema de control. De ese modo, el objetivo (1) se finaliza.
El objetivo (2) se basa en el diseño de los controladores del esquema IMC. El objetivo de los controladores de IMC es mantener los niveles de inventario de la cadena de suministro cerca del inventario objetivo mitigando el efecto látigo. Cada entidad de la cadena de suministro puede operar en varios modos de trabajo durante el tiempo: suministro infinito y suficiente existencia, (SISE), suministro infinito y Bajas existencia, (SIBE), Suministro limitado, (SL). Cuando el tiempo de espera es demasiado largo y existe incertidumbre en la demanda, muchas empresas optan por utilizar una estrategia de inventario de seguridad para garantizar la satisfacción de la demanda del cliente. En virtud de esta estrategia de la cadena de suministro está siempre en el modo de trabajo (SISE). Cuando el inventario es insuficiente, la cadena de suministro puede trabajar en cualquiera de los modos de trabajo (SISE), (SIBE) o (SL).
Por lo tanto, comenzamos proponiendo el diseño del sistema de control para una cadena de suministro bajo la estrategia de inventario de seguridad (SISE). El diseño está basado en las directrices del esquema IMC en el cual se realiza un balance entre la mitigación del efecto látigo y el seguimiento del inventario.
Después de eso, el sistema de control se diseña para una cadena de suministro trabajando sin inventario de seguridad (es decir, en cualquier modo de funcionamiento (SISE), (SIBE) o (SL)). Por lo tanto, se propone un sistema de control de inventario conmutado bajo la estrategia de control descentralizado. Este consiste en un banco de controladores diseñados para cada posible caso de funcionamiento de cada entidad y una lógica de conmutación que selecciona el mejor controlador en cada instante de tiempo. Así, el objetivo (2) está terminado.<br>This thesis relies on the design of inventory management strategies in supply chain systems by using control theory approaches. The main objective is to propose a control scheme to solve the principal problems appearing in the inventory control of the supply chain (uncertainty in the lead time, the bullwhip effect and the inventory drift). This objective is divided in two particular objectives:
1. On the one hand, the counteraction of effects caused by the existing delay between the time at which an order is placed on the immediate supplier and the moment at which the petition is satisfied.
2. On the other hand, the design of inventory policies allowing a trade-off between the disturbance (demand) rejection and the inventory target tracking.
Since the internal model control scheme (IMC) allows to tackle the objectives (1) and (2) under the same paradigm of control but in a decoupled way, the IMC scheme is presented in this thesis as a novel inventory replenishment policy for the entire supply chain. Nevertheless, the IMC requires the perfect knowledge of the lead time to compensate its effects. This situation is not viable when the delay changes during the process which is a common situation in supply chains.
Hence, first of all, the research is focused on the identification of the lead time. As a result of this part of the research, an identification algorithm that allows to estimate the actual delay values of the entire supply chain at each time interval is formulated. The estimated delay values are used to adapt the delay block in the control scheme. Thereby, the particular objective (1) is finalised.
The objective (2) relies on the design of the IMC scheme controllers. The aim of the IMC controllers is to keep the inventory levels of the supply chain close to the inventory target mitigating the bullwhip effect. Each echelon of the supply chain may operate under several working modes during the time: Infinite Supply and High stock, (ISHS), Infinite Supply and Low Stock, (ISLS), Limited Supply, (LS). When the lead time is too long and there exist uncertainty in the demand level, many companies choose to use a safety stock strategy to assure the customer demand satisfaction. Under this strategy the supply chain is always in the (ISHS) working mode. When the stock is insufficient, the supply chain may work under any of (ISHS), (ISLS) or (LS) working modes.
Therefore, we start proposing the design of the control scheme for supply chain under safety stock strategy (ISHS). The design is based on the IMC guidelines where a trade-off between the bullwhip effect avoidance and inventory tracking is carried out, which is the second objective of the research.
After that, the control scheme is designed for a supply chain working without safety stock (i.e. under any working mode (ISHS), (ISLS) or (LS)). Therefore, we propose a switched inventory control system for a serial multivariable supply chain under decentralized control strategy. This consists in a bank of controllers designed for each possible operation case of each echelon and a switching logic that selects the best controller at each instant time. Thus, the objective (2) is finalised.
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Kless, David R. "A comparison of an alternative inventory control concept with the Navy's existing wholesale inventory control procedures for repairables." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA356538.
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Thesis (M.S. in Operations Research) Naval Postgraduate School, September 1998.<br>"September 1998." Thesis advisor(s): Kevin J. Maher. Includes bibliographical references (p. 53-54). Also available online.
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Hilding, Gustaf, and Kristoffer Ryytty. "Consumption-driven Inventory Control : A study of inventory management applied to machining tools." Thesis, KTH, Industriell produktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-174148.
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Within manufacturing industries, capital is tied up in machines, tools and inventory of unprocessed raw materials as well as finished goods and everything in between, also known as work in progress. Naturally, firms strive to minimize the capital employed in these items and thus facilitate a leaner operation. At the same time, it is important to maintain a stable and uninterrupted production. A prerequisite for maintaining a stable production is that the inputs of the production processes are available at all times. Machining tools need to always be available and easily accessible in order to minimize machine downtime in between batch orders, and if a machine breaks down, the necessary spare parts must be provided quickly. This study has been performed in order to investigate when it would be beneficial for a manufacturer of heavy vehicles to achieve a consumption-driven system for ordering machining tools. More specifically, it looks into the prerequisites and the potential benefits of such a system.This research has been done by conducting a case study at Scania Transmission Machining in Södertälje, Sweden, which is the department responsible for manufacturing conical gears and gear transmission components for Scania’s European production. The case study included a diagnosis of the current inventory control situation, which served the purpose of identifying weaknesses in the system and potential areas of improvement. Furthermore, simulations were conducted based on historical transaction data from the storage unit which supplies tools for the case company. This was done in order to investigate how a consumption-driven inventory control system may be set up in practice and to provide figures on potential monetary gains as well as other benefits.The findings from this study indicate that there are many incentives for Scania Transmission Machining to adopt and implement an inventory control system for machining tools which is based on the consumption. First off, the diagnosis of the current inventory control system revealed several weaknesses and inefficiencies in the system. Furthermore, simulating the inventory levels for a sample of tools showed improvements in terms of the number of days of shortage and in a lower average inventory level. Finally, the monetary savings have been estimated to amount to roughly 1 million SEK per year.<br>Inom tillverkande industri är kapital bundet i maskiner, verktyg och material av olika slag samt färdiga varor och allt däremellan, även kallat produkter i arbete. Företag strävar efter att minimera det uppbundna kapitalet i dessa enheter i syfte att få till stånd en kostnadseffektiv produktion. Samtidigt som man vill minska mängden uppbundet kapital är det viktigt att bibehålla en stabil produktion. En förutsättning för detta är att produktionsprocessernas råvaror och verktyg alltid finns tillgängliga. Skärande verktyg måste alltid finnas tillgängliga och lättåtkomliga för att minimera stilleståndstiden mellan produktionsordrar, och om en maskin går sönder måste de rätta reservdelarna kunna tillhandahållas snabbt. Den här studien har utförts för att undersöka när det skulle vara fördelaktigt för en tillverkare av tunga fordon att implementera ett förbrukningsstyrt system för beställning av skärande verktyg. Studien fokuserar mer specifikt på de förutsättningar som krävs för att ett förbrukningsstyrt system ska kunna implementeras och på de potentiella fördelarna med ett sådant system.En fallstudie har genomförts på Scania Transmission Machining i Södertälje, Sverige, den avdelning som tillverkar koniska växlar och andra transmissionskomponenter för Scanias europeiska produktion. I fallstudien ingår en diagnos av den aktuella lagerstyrningssituationen i syfte att identifiera svagheter i systemet och potentiella förbättringsområden. Vidare har simuleringar utförts, baserade på transaktioner från förrådsenheten som förser produktionen med verktyg. Detta syftade till att undersöka hur ett förbrukningsstyrt lagerstyrningssystem kan upprättas i praktiken och för att ta utreda vad vinningen i så fall skulle vara.Resultaten från studien visar att det finns många anledningar för Scania Transmission Machining att implementera ett förbrukningsstyrt lagerstyrningssystem för skärande verktyg. Först och främst avslöjade diagnosen av den aktuella lagerstyrningssituationen flertalet brister i systemet. Dessutom visade simuleringarna av verktygens lagernivåer på förbättringar när det gäller antalet dagar med brist och samtidigt en lägre genomsnittlig lagernivå. Slutligen har vinsten med att övergå till en förbrukningsstyrd modell uppskattats uppgå till ca 1 000 000 kronor.
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O'Leary, Bryan F. "Multi-echelon inventory control for arborescent systems." Thesis, Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/24548.
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何添賢 and Tim Yin Timothy Ho. "Forecasting with smoothing techniques for inventory control." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B42574286.
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Veatch, Michael H. "Queueing control problems for production/inventory systems." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12859.
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Ismail, Siti Z. B. "Product-service system inventory control : manufacturing perspectives." Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/23645.
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This thesis explores the role of Inventory Control in Product Service System (PSS) applications within manufacturing contexts. This research led to a new approach for dealing with inventory control and contributes to understanding of the PSS paradigm in manufacturing industries. PSS embraces the product and service continuum as one system; meanwhile, Inventory Control has led to substantial improvements in performance across many industries. PSS and Inventory Control have for many years been recognized in the scientific literature and by industry as enablers of manufacturing operations. Most studies in the field of PSS and Inventory Control have only focussed on its individual scenarios; little is known about where the boundaries of PSS should lie as it needs to integrate both external and internal elements in managing PSS Inventory Control. To date, very little research has been reported related to inventory control in product-service systems from manufacturing operations perspectives. Research has been done in three stages: (1) PSS characteristics were synthesised from the literature; (2) current industry example of PSS inventory were investigated through a survey; four case studies were developed; (3) uncertainty elements were identified from the literature related to the current PSS Inventory Control scenario and these were evaluated, developed and validated producing a generic model. The research carried out involved collecting primary data from qualitative research conducted through four case studies with companies in the United Kingdom and Malaysia; and information from secondary sources; utilising techniques such as survey, interview, matrix and modelling language method. This thesis contributes to the current PSS research by developing a generic model of PSS Inventory Control from manufacturing operations perspectives and a PSS Inventory Control (PSSIC) Framework.
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Bregman, Robert Louis. "An investigation of multiechelon inventory control systems /." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487591658174761.
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Hedenstierna, Carl Philip. "Staggered deliveries in production and inventory control." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/87502/.
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This thesis investigates production-inventory systems where replenishments are received every period (for example every day or shift), but where production plans are determined less frequently (weekly, fortnightly, or monthly). Such systems are said to use staggered deliveries. This practice is common in industry, but the theoretical knowledge is limited to a small set of inventory models, none of which include capacity costs. This thesis uses time series analysis to expand our understanding of staggered deliveries from the perspectives of inventory and production-inventory control. The contribution to inventory theory consists in the development of an optimal policy for autocorrelated demand and linear inventory costs, including exact expressions for costs, availability, and fill rate. In addition the thesis identifies a procedure for finding the optimal order cycle length, when a onceper- cycle audit cost is present. Notably, constant safety stocks are suboptimal, and cause both availability and fill rate to fluctuate over the cycle. Instead, the safety stocks should vary over time, causing the availability, but not the fill rate, to be constant. The contribution to production-inventory theory comes from two perspectives: First, an optimal policy is derived for quadratic inventory and capacity costs; second, four pragmatic policies are tested, each affording a different approach to production smoothing and the allocation of overtime work (once per cycle, or an equal amount of overtime every period). Assuming independent and identically distributed demand, these models reveal that all overtime or idling should be allocated to the first period of each cycle. Furthermore, it is shown that the order cycle length provides a crude production smoothing mechanism. Should a company with long reorder cycles decide to plan more often, the capacity costs may increase. Therefore, supply chains should implement a replenishment policy capable of production smoothing before the order cycle length is reduced.
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Ortiz, Olga L. "Stochastic inventory control with partial demand observability." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22551.
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Thesis (Ph. D.)--Industrial and Systems Engineering, Georgia Institute of Technology, 2008.<br>Committee Co-Chair: Alan L Erera; Committee Co-Chair: Chelsea C, White III; Committee Member: Julie Swann; Committee Member: Paul Griffin; Committee Member: Soumen Ghosh.
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Ho, Tim Yin Timothy. "Forecasting with smoothing techniques for inventory control." Click to view the E-thesis via HKUTO, 1994. http://sunzi.lib.hku.hk/hkuto/record/B42574286.
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SRIVASTAVA, SWATI. "INVENTORY MANAGEMENT AND CONTROL AT HERSHEY COMPANY." Thesis, Delhi Technological University, 2021. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18330.
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The objective of the project is to understand the importance of Inventoy control and
management within an organization. Productive stock organization ought to achieve the
development of the owners' wealth. Therefore, a firm should neither hold over the top
inventories nor hold lacking inventories, i.e., it should hold the ideal level of stock. The
ideal level ofstock endeavor lies between the reason for pointless and lacking levels.
The chocolate business in India the way things are, overpowered by two associations,
both multinationals. The market head is Cadbury with a great deal of 70%. The
association's brands (Five Star, Jewels, Eclairs, Advantage, Dairy Milk) are pioneers
their sections.
Hershey Company has a part of stock organization where finished things inventories are
directed and controlled. Inventories are supervised by promoting of things over all stock
keeping. The division analyzes the sudden change in available stock in a fitting way.
The foundations of changes are found and appropriate moves are made. The workplace
perceives the things to proceed with the flood framework and gives its contribution to all
accomplices
As there was no primary research carried out, for secondary information on operations
and supply chain management of coca cola, research was taken from various sources.
The overall findings from this project shows the organization has finished and exact
information on the stock over the units and stock administration at all units
extraordinarily improved after execution of SAP. Coordinating desire with result is a
significant element for progress, particularly for organizations spread across region of
India
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Herington, Stephen (Stephen Richard). "Supplier inventory and operations management process improvement methodology." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/81000.
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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division; in conjunction with the Leaders for Global Operations Program at MIT, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 62-63).<br>The Building Construction Products (BCP) Division of Caterpillar makes 12 different loader, excavator, and tractor products with 10 manufacturing facilities worldwide. With relatively high volume machines, BCP saw that their supply base continued to have challenges in managing their inventory levels when machine volume and mix would change. Challenges included poor Supplier Shipping Performance (SSP), Point of Use (POU) availability, and inventory turns. These failures translated into poor Committed Ship Date (CSD) performance; which also directly impacted the overall cost of production and profitability of BCP. For example, coming out of the 2009 recession, suppliers were unable to keep up with BCP's increasing demand; which was attributed to supplier's lack of confidence in the BCP forecast, and only reviewing a 13-week capacity outlook. Therefore, BCP would like to have visibility into their supplier's planning processes, and through enhanced collaboration and communication, improve both BCP and their supplier's performance. To obtain the expected result, the scope of the project was to evaluate the Sales & Operations Planning (S&OP) processes of two identified suppliers. While the primary goal of the project was to develop a robust BCP Supplier S&OP process, the performance improvements were generated from Inventory and Operations Management tool creation and process improvement. The project followed the 6 Sigma approach of DMAIC to clearly evaluate the S&OP processes at both BCP Leicester and the two identified suppliers. The study concluded, through the development of a Supplier S&OP process that there were several important factors hindering the implementation of S&OP. These factors included capacity planning, planning parameters and inventory management policies. To enable implementation, the following tools were created: 1. Capacity Planning Tool enabled £30k annual cost avoidance on labor, logistics, and equipment through proactive management and scenario planning 2. Batch Size Tool enabled £20k+ reduction of inventory holding costs while also reducing near-term schedule variation to 2nd tier supplier 3. Safety Stock Tool provided inventory levels to align customer service with lead-times Through looking at the current BCP S&OP process at Caterpillar several key issues were identified with the quality of the output. These included lack of accountability for forecast accuracy and a lack of clear BCP Supply Chain strategy. To improve the identified issues the following actions were taken: 1. Created a Forecast Accuracy Tool that quickly identifies areas of concern 2. Submitted a future project proposal for Improving Piece-Part Forecast Accuracy 3. Recommended a future project for Cost Analysis on 8 week order-to-delivery SC model.<br>by Stephen Herington.<br>S.M.<br>M.B.A.
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Hill, Roger M. "Lost sales inventory models." Thesis, University of Exeter, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302560.
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林志立 and Chi-lap Lam. "Analysis of inventory systems with demands met either from inventory or by special deliveries." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B3120868X.
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Adelman, Daniel. "Remnant inventory systems." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/25620.
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Bredenkamp, Frederick van Biljon. "The development of a generic just-in-time supply chain optimisation software tool /." Link to the online version, 2005. http://hdl.handle.net/10019/980.
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Jernigan, Stephanie A. "Multi-Tier Inventory Systems With Space Constraints." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5208.
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In the warehouse of a large cosmetics company, a mechanized order picker is restocked from nearby shelving, and the shelving is restocked from bulk storage, forming a three-tier inventory system. We consider such multi-tier inventory systems and determine the storage areas to which to assign items, and the quantities in which to store them, in order to minimize the total cost of picking items and restocking storage locations. With this research, we increase the number of inventory systems for which simple search algorithms find a provably near-optimal solution. The model and method were tested on data from the Avon Products distribution center outside Atlanta; the solution identified by the model reduced picking and restocking costs there by 20%.
The sales forecasts of items stored in the warehouse may change, however, and new items will be introduced into the inventory system and others removed. To account for these changes, some warehouses may periodically reassign items to storage areas and recompute their storage quantities. These reassignment activities account for additional costs in the warehouse. The second focus of this research examines these costs over several time periods in a simple multi-tier inventory system. We develop heuristics to determine the storage areas to which to assign items and the quantities in which to store them in each time period, in order to minimize the total cost of picking items, restocking storage locations, and reassigning skus over multiple periods.
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Li, Yanzhi. "Joint pricing and inventory control for perishable products /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?IELM%202006%20LI.
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Ormeci, Melda. "Inventory Control In A Build-To-Order Environment." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11532.
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This dissertation consists of three independent sections: In the first part, focusing on the auto industry we look at the challenges and solution strategies of employing build-to-order (BTO) with global supply. We consider some familiar tools for managing domestic supply and exploit them for managing international supply, and propose new methods. We study frequency of supply as a way to improve performance. We study the impact of forecast accuracy, and conclude that improvements there alone may not be sufficient to obtain desired savings. Within this perspective we look at a new shipping policy, 'Ship-to-Average", which prescribes sending a fixed quantity, based on the long term average forecast, with each shipment and making adjustments only if the inventory strays outside a prescribed range.
In the second part we look at a Brownian control problem. When a manufacturer places repeated orders with a supplier to meet changing production requirements, he faces the challenge of finding the right balance between holding costs and the operational costs involved in adjusting the shipment sizes. Consider a storage system whose content fluctuates as a Brownian motion in the absence of control. A linear holding cost is incurred continuously. Inventory level can be adjusted by any quantity at a fixed plus proportional cost. We show control band policies are optimal for the average cost problem and calculate the optimal policy parameters. This form of policy is described by three parameters q, Q, S. When the inventory falls to 0 (rises to S), the controller expedites (curtails) shipments to return it to q (Q). Developing techniques based on Lagrangian relaxation we show that this type of policy is optimal even with constraints on the size of adjustments and on the maximum inventory level.
The Brownian Control problem can be viewed as an idealization --without delivery delays, of the problem of supplying BTO operations, and provides some theoretical explanation for the Ship-to-Average policies. In fact, Ship-to-Average policies are a practical implementation of Control Band policies in the setting with delivery delays.
Finally, we explore the power and applicability of the Lagrangian approach developed in the second part.
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Solyali, Oguz. "An Integrated Inventory Control And Vehicle Routing Problem." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606445/index.pdf.
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In this study, we consider a logistics system, in which a single supplier delivers a product to multiple retailers over a finite time horizon. Supplier decides on the amount to order in each period and services retailers facing deterministic dynamic demand via a fleet of vehicles having limited capacity. Each retailer has specific minimum and maximum levels of inventory in an order-up-to level inventory policy setting. The problem is to simultaneously determine the quantity of product to order to the supplier, retailers to be visited, the quantity of product to be delivered to retailers and routes of vehicles in each period so as to minimize system-wide costs. We present a mathematical formulation for the problem, for which we develop several Lagrangian relaxation based solution procedures providing both upper and lower bounds to the problem. We implement these solution procedures on test instances and present the results. Computational study shows that our solution procedures generate good feasible solutions in reasonable time.
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Veatch, Michael H., and Lawrence M. Wein. "Monotone Control of Queueing and Production/Inventory Systems." Massachusetts Institute of Technology, Operations Research Center, 1991. http://hdl.handle.net/1721.1/5312.
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Weber and Stidham (1987) used submodularity to establish transition monotonicity (a service completion at one station cannot reduce the service rate at another station) for Markovian queueing networks that meet certain regularity conditions and are controlled to minimize service and queueing costs. We give an extension of monotonicity to other directions in the state space, such as arrival transitions, and to arrival routing problems. The conditions used to establish monotonicity, which deal with the boundary of the state space, are easily verified for many queueing systems. We also show that, without service costs, transition-monotone controls can be described by simple control regions and switching functions, extending earlier results. The theory is applied to production/inventory systems with holding costs at each stage and finished goods backorder costs.
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Bregman, Robert Louis. "An investigation of multi-echelon inventory control systems." Connect to resource, 1988. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1271854421.
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Liu, Jean Jingying. "Inventory control through a CONWIP pull production system." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/63230.
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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 83-84).<br>Production systems such as the CONWIP (constant work-in-process) pull production system have been widely studied by researchers to date. The CONWIP pull production system is an alternative to pure push and pure pull systems that lowers and controls inventory levels and reduces production lead time. In this study, a CONWIP pull production system was simulated in place of the current push production system at a food packaging company. ARENA 12.0 simulation software was used and a production system with two dedicated production lines was proposed to reduce the current system's complexity. A method for obtaining the optimum CONWIP level was determined. Various advantages of the CONWIP pull production system were analyzed and it was found that besides a reduction in planning complexity, the proposed two dedicated lines with CONWIP pull production system can also help the company to greatly reduce their total WIP and achieve inventory holding costs savings of over S$38,000 per month. In addition, the total customer lead time can also be reduced from 12 days to 10 days while still meeting customer demand.<br>by Jean Jingying Liu.<br>M.Eng.