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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Određivanje parametara korelacije izbora aktuatora i vremena ciklusa proizvodnje / Determining the parameters of correlation election of actuator and production cycle time

Oros Dragana 26 December 2014 (has links)
<p>Istraživanja u okviru ove disertacije su usmerena ka određivanju parametara korelacije izbora aktuatora i vremena ciklusa proizvodnje. Dobijeni parametri se koriste kao ulazni elementi metode koja će biti implementirana u softverski paket. Verifikacija predložene metode je izvršena na studijama slučajeva: IML robota i manipulatora za mašinu za termoformiranje, koje predstavljaju odgovarajuće primere uređaja u koje se ugrađuju svi tipovi aktuatora.</p> / <p>Research within this thesis are focused on determining the parameters of correlation election of an actuator and a production cycle time. The resulting parameters are used for the development of appropriate methods that will be implemented in the software package. Verification of the proposed method is performed on case studies: IML robots and manipulators for thermoforming machine, which are appropriate examples of devices that incorporate all types of actuators.</p>
2

Optimization of intermediate storage size in a production process subjected to Variable customer demands for an efficient material Utilization. : A case study on the production process at SKF

Godians, Samuel January 2014 (has links)
Intermediate storage system optimization is an essential aspect which this report tends to look upon and putting effort on improving operating efficiency then reducing the capital cost of batch/ semi-continuous or flow production process by looking at the extent of estimating the figures of boxes that are made to be in the intermediate storage system through evaluations. Additionally, intermediate storage can reduce the effects of process parameter variations, such as recipe inaccuracies and operator errors, in which process operations are particularly visible. In a channel of operations, where there are many amount of shift that are inevitable to pass through in order to complete production process to get a finished product. Hence, longer operating horizon, process variations must include a measurable parameter, either shorter or longer to avoid failure of meeting product specification and limitation of meeting end users specification. Intermediate storage system as a back-up function in case of some sudden failure within the production line In this thesis, it is notable to make an amendment, as a way of knowing the accuracy of boxes of bearing work-piece that will be maintaining a certain intermediate storage system to feed the next shift of workstation in a continuous process with accurate or known estimated number of work-piece in a role, until the final product is been made. Hence, in this research, there are many theory that were adopted to give a clear view of what will be obtainable in the whole research both in empirical finding to have a definite result. To achieve the above goal this thesis followed a steps to fulfil its objective. Steps 1 and 2 were to know the strategic plans as well as operating methods through theory also, to know the production line balancing to have a view of time measured through the theory. Step 3 and 4 adoptions of theory and empirical finding to calculate, productivity through the source of cycle time, as well as facility plan and to give analysis of intermediate storage system, in optimization of production line to make a work flow achievable at the end, to meet the customers demand.
3

Inventory policy diagnosis and its importance for the strategic administration of manufacturing / Diagnóstico da política de inventário e a sua importância para a administração estratégica da manufatura

Aurimar José Pinto 08 March 2003 (has links)
The constant needs for the reduction of companies operational costs has transformed Inventory into a targeted source for this end by upper management. The high investment value that it represents for organizations, aside from the immediate contribution to cash flow, when it is reduced, allows inventory to be a source of strategic advantage. The objective of this study is to understand the behavior of independent variables such as production cycletime or lead-time, daily demand rate of finished product and the interval between production orders and their effects on the determination of an inventory policy. The study is performed in a manufacturing company that produces intermittent, repetitive small batches and a large variety of products. Cash flow techniques are applied to detail the production processes and respective planning. The historical data of mentioned variables refer to the period from January 2000 to February 2002. These data are used to develop the calculations of safety stock and average and maximum stock from the viewpoint of the management approach in Replenishment Point and Periodically Review. The real application of the data available from the company is studied to calculate the inventory policy. It is concluded that, in spite of the adoption of a sophisticated mechanism of production planning and a strong culture of measurements by the company, the statistical data of fundamental variables are not utilized systematically to determine the inventory policy. This fact confirms the thesis that inventory reductions, in general, are circumstantial and is not supported by fundamental techniques. / A constante necessidade de redução dos custos operacionais das empresas tem transformado o Inventário em fonte preferencial, para este fim, pela alta administração. O alto valor de investimento que ele representa para as organizações, além da contribuição imediata no fluxo de caixa, quando da sua redução, faz com que o inventário seja uma fonte de vantagem competitiva.O objetivo deste estudo é compreender o comportamento das variáveis independentes como tempo de ciclo da produção ou lead-time, taxa diária de demanda do item de produto acabado e tempo de intervalo entre ordens de produção, e os seus efeitos no cálculo de uma política de inventário.O estudo é realizado em uma empresa de manufatura de produção intermitente repetitiva em lotes de pequenas quantidades e grande variedade de produtos.Técnicas de fluxo de valor são aplicadas para detalhamento dos processos de produção e do seu respectivo planejamento. Os dados históricos das variáveis mencionadas referem-se ao período de janeiro de 2000 a fevereiro de 2002. Com estes dados, desenvolvem-se os cálculos de estoque de segurança, estoque médio e máximo,sob a óptica das abordagens de gerenciamento por Ponto de Reposição e Revisão Periódica. Analisa-se a real aplicação dos dados disponíveis na empresa, para o cálculo da política de inventário. Conclui-se que apesar de ser adotado mecanismo sofisticado de planejamento de produção e haver uma forte cultura de medições por parte da empresa, os dados estatísticos das variáveis fundamentais não são utilizados de forma sistemática para o cálculo da política de inventário. Este fato confirma a tese de que as reduções de inventário, de uma maneira geral, são circunstanciais e não sustentadas por fundamentos técnicos.

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