Comparação de desempenho entre as configurações celular, funcional e celular virtual através de simulação e projeto de experimentos
The appropriate choice of the production management system and the physical layout of the shop floor are fundamental for the viability of an industrial activity in the current globalized and highly competitive economy. More and more specialized products, with successively shorter life cycles seek to respond to the frequent market changes, demanding an agile and flexible industrial system that at the same time is economically efficient. Great part of the industrial companies manufacture their products in batch-based manufacturing systems using the job shop (functional) or the traditional cellular layouts. However, in those arrangements there is always a compromise solution between efficiency and flexibility. Seeking to provide a solution to this difficulty, the concept of virtual cellular manufacturing appears, which encompasses the high routing flexibility of job shop production with the efficiency in terms of setup of the traditional cellular configuration. However, the virtual cell configuration can also present the disadvantages of both systems, such as longer movement times and the need for additional resource capacity. Since few research works have been carried out on this concept, particularly attempting to accomplish analytical comparisons of several scenarios simultaneously, the implementation of the virtual cellular configuration in industry is still almost inexistent, despite the competitive advantage that this configuration change may provide to manufacturing systems. In order to fill this gap, this thesis seeks to contribute to the investigation of the problem of lack of efficiency and flexibility, by evaluating, through simulation and design of experiments, the performance of job shop and cellular traditional manufacturing systems in comparison with the a virtual cell manufacturing system, identifying the conditions in which the application of this latter configuration is advantageous compared with the others. These systems will be studied thorugh the aid of models with identical capacities and subject to the same demand, and their production sequences are generated by priority criteria. A significant number of factors, levels and replications will be used with the objective of delimiting appropriately the scope in which virtual cells effectively lead to competitive advantages.
Advisor:Abelardo Alves de Queiroz; João Carlos Espíndola Ferreira; Roberto Silvio Ubertino Rosso; Paulo José de Freitas Filho; Herman Augusto Lepikson
School:Universidade Federal de Santa Catarina
Source Type:Master's Thesis
Keywords:planejamento da produção sistemas flexíveis de simulação por computador engenharia mecanica
Date of Publication:09/24/2008