Simulação de sistemas de coordenação de ordens em ambiente de produção flow shop

Abstract

Systems for Coordination of Orders (SCO) are information systems involved in all or some of the following Production Planning and Control (PPC) activities: to schedule or organise material requirements, and/or to control the production and purchasing orders release, and/or to schedule jobs on machines. The SCO can be applied in production environments as flow shop, job shop and cellular manufacturing. This research aims to compare the systems for coordination of orders kanban, CONWIP and TBC (kanban-CONWIP) in a real case that has as a flow shop production environment and propose a mind map with features that help in choosing the SCO. To accomplish this goal, we used the theoretical and conceptual research method, the experimental method, via computer simulation, and a case study in an automotive company. Among the main results for the company studied, it was observed that, in a global analysis, the TBC and kanban proved better than the CONWIP and the push system (current company situation). As to the main results of the analysis of pull systems in various scenarios, in most of these, the CONWIP and TBC were present as a generator of higher throughput and TBC and kanban had the lowest values of WIP. Another point to be noted is that the kanban performed better regarding WIP and/or throughput in scenarios with high coefficients of variation in arrival and processing times, greater variety of items and with the presence of bottlenecks in the line. The aid to the choosing procedure for the most appropriate SCO in management practice is among the contributions of this work. As for the literature of production management, this thesis originates important information for the area of PPC and supports the accomplishment of future research on this topic.