This thesis deals with the logistics of WISSA, spol. s r.o. The aim of this thesis is the characterization of the individual areas of the company's logistics. It also summarizes the legislative and contractual requirements, which the company must follow. I describe the company's system of transportation, warehousing, inventory management, as well as the flow of logistical information. I also note the tools that enable the function of each area. I am also looking for problems that arise in the company's logistics and I am trying to provide solutions for them. Using of various analysis and methods - such as the ABC method or the method of inventory management, I suggest improvements for corresponding areas of logistics. At the request of company management, which also represents the main user of the results of this thesis, I deal with several decision problems related to logistics. Specifically, I am providing them with information for the choice concerning the benefits of changing the location of the company's warehouse or decisions about the choice of transportation methods.

O principal propósito deste trabalho é avaliar as principais variáveis que devem ser consideradas no dimensionamento do buffer de componentes de uma empresa que trabalha sob a ótica da Manufatura Enxuta, que devem ser fornecidos a uma célula de manufatura com mix variado de conjuntos similares a serem produzidos. Como mecanismo de validação da investigação, devido ao dinamismo inerente a operação de sistemas de produção com layout célular, foi utilizada a ferramenta Mapeamento de Fluxo de Valor com o apoio de uma estrutura de um software comercial de simulação computacional aplicando o otimizador do aplicativo desenvolvido a partir de um algoritmo genético a fim de contrapor o uso do abastecedor das células com o controle efetivo do nível de inventário do buffer. Como resultado são apresentados diferentes cenários definidos como experimentos tendo como principal fator a variação do tempo de ciclo de abastecimento executado e o fluxo de material como parâmetro inerente a demanda por cada um dos componentes consumidos na operação da célula de manufatura. Através das análises dos resultados foi concluído que os elevados níveis de estoque se tornam ou não necessários dependendo preliminarmente da capacidade de carregamento por ciclo de abastecimento do transportador e o tempo de ciclo necessário para a realização da atividade de ressuprimento. A relevância do tema de pesquisa estudado encontra-se na contribuição pertinente às informações adquiridas in loco na realidade de uma empresa que trabalha sob a ótica da Manufatura Enxuta, no crescente aumento da complexidade dos sistemas produtivos e, consequentemente, da dificuldade de análises mais precisas do impacto que as variáveis de fluxo, como por exemplo, tempo de abastecimento e movimentação, tempo de setup e os respectivos roteiros de fabricação podem causar no desempenho dos processos no chão de fábrica. / The main purpose of this work is to evaluate the main variables that must be considered in the component buffer dimensioning of a company that works with Lean Manufacturing, which to a manufacturing cell should be supplied with a varied mix of similar sets to be produced . As a research validation mechanism, due to the dynamism inherent in the operation of production systems with cell layout, the Value Stream Mapping tool was used with the support of a commercial software simulation structure applying the developed application optimizer from a genetic algorithm in order to counteract the use of the cell supplier with the effective control of the inventory level of the buffer. As a result, different scenarios defined as experiments are presented, the main factor being the variation of the supply cycle time executed and the material flow as a parameter inherent to the demand for each of the components consumed in the manufacturing cell operation. Through the analysis of the results it was concluded that high levels of stock become or not necessary depending on the loading capacity per transport cycle of the conveyor and the cycle time required to perform the resupply activity. The relevance of the studied research theme lies in the relevant contribution to the information acquired locally in the reality of a company that works from the perspective of the Lean Manufacturing, in the increasing complexity of the productive systems and, consequently, of the difficulty of more precise analyzes of the impact that the flow variables, such as supply and handling time, setup time and the respective manufacturing routes, can cause in the process performance on the shop floor.

Made available in DSpace on 2016-04-28T20:19:11Z (GMT). No. of bitstreams: 1 2007-Alexandre Jose Ramos Valentim.pdf: 673243 bytes, checksum: d13a838d7af8a461dfb971477d4a2bcd (MD5) Previous issue date: 2007-06-22 / This paper work was focused on the inventory management of spare parts. This theme is very relevant to the academic means due to the little national research and literature about it. The main goal of this research is analyzing the use of the inventory management of spare parts hybrid model in a company in the steel field. In order to do that, it was carried out a critical review of the literature available, reviewing the fundamental concepts of the inventory management, such as stock techniques and approaches (Economical Order Quantity, Reorder Point, ABC, Just-in-Time and MRP), as well as the calculations needed to reorder the stocks, in addition to other specific issues and main indicators in the spare parts management. The methodology adopted was the field research, which allowed a major deepening into the issues of the research. The company studied was selected due to the importance of its inventory management techniques related to its maintenance activities in the company s field of work. Presented the productive flow and the supply of the company, detailing the processes related to the inventory management of spare parts, including the functioning of the computing systems, as well as the calculi that support the activities, and the analysis of the research results. In the critical analysis of the results, it was made a confrontation with the theories presented and improvements were suggested in the model of the strategic management of the company, with the goal of reducing the values in stock and improving the users service. / Este trabalho foi realizado com foco na gest?o de estoques de pe?as sobressalentes, sendo esse tema bastante relevante para o meio acad?mico devido a pouca pesquisa e literatura nacional a respeito. O objetivo principal desta pesquisa ? a an?lise do uso do modelo h?brido de gest?o de estoque de pe?as sobressalentes em uma empresa do setor sider?rgico. Para isso foi realizada uma revis?o cr?tica da literatura dispon?vel, sendo revistos os conceitos fundamentais para gest?o de estoques, como t?cnicas e abordagens de estoque (Lote Econ?mico de Compra, Ponto de Ressuprimento, ABC, Just-in-time e MRP), bem como os c?lculos necess?rios para reabastecer estoques, al?m das quest?es mais espec?ficas para a gest?o de pe?as sobressalentes e principais indicadores. Como metodologia, optouse pela utiliza??o da pesquisa de campo, que permitiu um maior aprofundamento das quest?es da pesquisa. A empresa escolhida foi selecionada pela import?ncia das t?cnicas de gest?o de estoques para suas atividades de manuten??o dentro do setor de atua??o. Apresentado o fluxo produtivo e de abastecimento da empresa, com detalhamento dos processos relacionados a gest?o de estoque de sobressalentes, incluindo o funcionamento dos sistemas informatizados e os c?lculos que apoiam as atividades, e a an?lise dos resultados da pesquisa. Na an?lise cr?tica dos resultados foi realizada uma confronta??o com as teorias apresentadas e sugeridas melhorias no modelo de gest?o estrat?gica da empresa, com o objetivo de diminui??o dos valores imobilizados em estoque e melhora dos n?veis de atendimento aos usu?rios.

O dimensionamento da capacidade de produção é um processo de vital importância para o sucesso das empresas, ainda mais quando se está inserido em um mercado de alta sazonalidade. Entretanto, este processo na maioria das vezes não é amplamente discutido internamente nas organizações. Freqüentemente, quando se necessita alterar a capacidade de produção das organizações devido a alterações nas previsões de demanda, atua-se apenas no dimensionamento dos recursos de forma direta ou, em casos extremos de aumento da demanda e indisponibilidade de investimentos, chega-se a efetuar o corte das vendas. Ao contrário disto, a tomada de decisão para o dimensionamento da capacidade de produção deve ser considerada como um processo gerenciável de forma sistêmica, confiável e robusta, influenciada pelo uso de ferramentas importantes como definições de cenários, análises quantitativa e qualitativa. Esta dissertação apresenta uma sistemática para apoiar o dimensionamento econômico da capacidade de produção de empresas com demanda sazonal. A sistemática prevê a discussão do dimensionamento da capacidade de produção considerando quatro grandes fases: identificação e exploração, análises e proposições de alternativas, ação e implementação de um melhor cenário escolhido e, finalmente, avaliações e observações do cenário implementado. Para cada uma das fases alguns passos e etapas foram definidos e, posteriormente, validados através da aplicação desta sistemática no dimensionamento da capacidade de produção da área de usinagem de uma empresa fabricante de máquinas agrícolas. A aplicação desta sistemática trouxe como resultado para a área de usinagem a implementação de um processo robusto e que auxilia na tomada de decisão quando se está inserido em um cenário onde ocorre a previsão de aumento da demanda. A sistemática trouxe benefícios de organização das informações e de se fazer a tomada de decisão para a escolha de um cenário com base nas análises de economicidade dos cenários estudados, porém mostrou-se bastante sensível à acuracidade das previsões de demanda, o que aponta, em futuras aplicações, para uma necessária flexibilização dessa variável pela realização de análise de sensibilidade. / The production capacity sizing is a key process for companies’ success, even more if the organization is involved in a high seasonal environment. However, this process is often not fully discussed by the organizations for decision-making. When it is needed to review the production capacity sizing due to demand predictions, most companies act directly upon the quantity of equipment and redesign the process or, in cases the demand is higher than the production capacity and the company is unprepared to invest to increase capacity the decision is to cut sales. Instead of this, companies should consider production capacity sizing as a manageable, in a systemic way, reliable and robust process. The decision-making for this process should be influenced by scenarios definitions, economic and qualitative analysis. This work presents a method to help the economic sizing of production capacity for companies that are involved in seasonal environment. This method includes a discussion about capacity sizing considering four important phases: identification and exploration, analysis and proposals of alternatives, actions and implementation of the best scenario chosen and, finally evaluation and observations from the implemented scenario. In each phase, steps and activities are defined and illustrated through an application at a machining department of an agricultural machinery maker company. The application of this method at the machining area of the company resulted in a robust and reliable process implemented to help in decisionmaking when it is needed to review the production capacity based on demand predictions. The method brought benefits to organize the information and practice decision-making to choose the best scenario based on economic analysis, however the method proved to be very sensitive to the accuracy of demand predictions, which points, in future applications, to a necessary flexibility of this variable by conducting sensitivity analysis.

System Administrators use many of the same tactics that are implemented by hackers to validate the security of their systems, such as port scanning and vulnerability scanning. Port scanning is slow, and can be highly inaccurate. After a scan is complete, the results of the scan must be cross checked with a vulnerability database to discover if any vulnerabilities are present. While these techniques are useful, they have severe limitations. System Administrators have full access to all of their machines. They should not have to rely exclusively on port scanning them from the outside of their machines to check for vulnerabilities when they have this level of access. This thesis introduces a novel concept for replacing port scanning with a Log File Inventory Management System. This system will be able to automatically build an accurate system inventory using existing log files. This system inventory will then be automatically cross checked with a database of known vulnerabilities in real-time resulting in faster and more accurate vulnerability reporting than is found in traditional port scanning methods.

La presente investigación resalta la importancia de aplicar una mejora en la gestión de inventarios para una empresa dedicada a la fabricación y comercialización de prendas de vestir, específicamente camisas. El objetivo principal de la investigación es reducir los costos generados por una deficiente gestión de inventarios, es decir, reducir costos por sobre stock de inventarios y baja rotación de inventarios, además planificar el requerimiento de materiales. El primer capítulo describe los artículos e investigaciones relacionadas a la propuesta en los últimos años. Además, se explica los conceptos relacionados a la gestión de inventarios, pronósticos, requerimiento de materiales, y otras herramientas como matriz de kraljic y el modelo de cantidad económica. En el segundo capítulo se brinda una visión general de la empresa en estudio, se describe y reconoce los problemas existentes, priorizando el más significativo a fin de identificar las causas que lo originan para posteriormente seleccionar la mejor alternativa de solución. En el tercer capítulo se presenta la propuesta de mejora para la gestión de inventarios de acuerdo a la información obtenida de la empresa cuya justificación está en el beneficio que se podría obtener. Finalmente, se expone las conclusiones y recomendaciones para la propuesta de mejora para la gestión de inventarios. / This thesis below highlights the importance of developing a proposal for improvement inventory management system for a company dedicated to manufacture and marketing men’s clothing, specifically shirts. The main objective of the investigation is to reduce the costs originated by a deficient inventory management, which means, reduce the costs by excessive stock and low inventory turnover, and material requirement planning. The first chapter describes the different research articles in the last years that are related to the proposal. Besides, the concepts related to the inventory management are explained, as well as demand forecasting, MRP and some other inventory management tools. The second chapter presents a general vision of the company; describing and recognizing the existing problems, for later prioritize the most significant problem in order to identify the causes that have its origin to finally select the best solution. The third chapter introduces the proposal for improvement inventory system according to the information given by the company and the benefit that can be acquired. Finally, conclusions and recommendations will be presented for the proposal. / Trabajo de Investigación

<p>GNT Group is a Nordic/Baltic wholesaler that distributes products in the IT, entertainment and home electronics sector. GNT is facing problems with inaccurate inventory levels which can lead to unnecessarily high inventory carrying costs or lost sales. Currently the decisions about when and how many to order are made somewhat arbitrarily by the responsible personnel. Their decisions are based only on some brief sales history and on experience. </p><p>GNT wants to develop its ERP system to be able to support the purchaser in these and other related decisions. The purpose of this thesis is to give suggestions to what decisions the ERP system should support and how these decisions can be made. </p><p>The three main tasks in this thesis are to suggest how to calculate the optimal order quantity, how to calculate the optimal ordering point and how to decide whether it can be profitable to store an article in only one of GNT’s warehouses. </p><p>The suggested solution is based on a volume value/demand frequency classification which also takes an item’s life cycle characteristics into consideration. For the different classes suitable calculations and decisions are suggested concerning the three main tasks and issues related to them.</p>

Fluid dynamics models provide a powerful deterministic technique to approximate stochasticity in a variety of application areas. In this paper, we study two classes of fluid models, investigate their relationship as well as some of their applications. This analysis allows us to provide analytical models of travel times as they arise in dynamically evolving environments, such as transportation networks as well as supply chains. In particular, using the laws of hydrodynamic theory, we first propose and examine a general second order fluid model. We consider a first-order approximation of this model and show how it is helpful in analyzing the dynamic traffic equilibrium problem. Furthermore, we present an alternate class of fluid models that are traditionally used in the context of dynamic traffic assignment. By interpreting travel times as price/inventory-sojourn-time relationships, we are also able to connect this approach with a tractable fluid model in the context of dynamic pricing and inventory management. Finally, we investigate the relationship between these two classes of fluid models. / Singapore-MIT Alliance (SMA)

GNT Group is a Nordic/Baltic wholesaler that distributes products in the IT, entertainment and home electronics sector. GNT is facing problems with inaccurate inventory levels which can lead to unnecessarily high inventory carrying costs or lost sales. Currently the decisions about when and how many to order are made somewhat arbitrarily by the responsible personnel. Their decisions are based only on some brief sales history and on experience. GNT wants to develop its ERP system to be able to support the purchaser in these and other related decisions. The purpose of this thesis is to give suggestions to what decisions the ERP system should support and how these decisions can be made. The three main tasks in this thesis are to suggest how to calculate the optimal order quantity, how to calculate the optimal ordering point and how to decide whether it can be profitable to store an article in only one of GNT’s warehouses. The suggested solution is based on a volume value/demand frequency classification which also takes an item’s life cycle characteristics into consideration. For the different classes suitable calculations and decisions are suggested concerning the three main tasks and issues related to them.

Introduction: The growth of small business is fast and their impact on the economy is becoming bigger. How to manage the inventory effectively and efficiently often is a challenge for these small businesses. The study took place at HEM-SOL FORSALJNINGS AB, a company involved in gym sports equipment wholesale. For HEM-SOL two inventory problems, stock-out and overstock occur frequently. The company wants to improve its efficiency and is con-sidering a change in the inventory management. Purpose: The purpose of this study is to investigate the reasons behind the inventory management inefficiency in HEM-SOL, and then the proposed managerial suggestions will be presented to deal with the issues. Method: The study is considered as qualitative single-case study. Data collection is mainly through the interviews with the top manager and other staff involved in inventory control opera-tions. Secondary data is retrieved from the information system to provide the annual pur-chasing and sales report about twenty items using a purposive sampling approach. Data analysis follows the theoretical framework. Conclusion: Small businesses have limited financial resources and bargaining power. Long-distance suppliers, big fluctuation of demand and lack of formalized inventory control system result in HEM-SOL bad performance on inventory management. The authors analyze the col-lected data and establish a formal inventory control system as the solution to improve the company’s inventory management.