Proposta de um modelo para avaliação do impacto da variabilidade dos processos produtivos sobre a eficiência global de equipamentos e seus desdobramentos no contexto da gestão do posto de trabalho

Abstract

This work has covered the analysis of the incorporation of the effects related to process variability on the OEE (Overall Equipment Effectiveness) Index and its consequences on WM (Workplace Management). The main objective was to propose a model for assessing the impact of variability on OEE and WM. The proposed model was tested in two metal-mechanic companies, by studying four work stations. It originally started with a review of the concepts of WM and the evolution of the use of OEE in evaluating the efficiency of equipment tied to the TPM (Total Productive Maintenance); it has been considered as well management wastes such as lack of production planning, lack of operator, meetings, etc. A review of the concepts related to the variability of processes and ways to monitor it were also taken into consideration. Based on case studies developed in four equipments, it was shown that the implementation of the proposed model provided improvements in the results of OEE. For instance: the OEE increased in last December from 49% to 62% in case 1 and from 71% to 77% in case 3. Another result is related to the perceived use of the model as a management tool, which provided for those involved in the WM a better understanding of variability, the correct identification of common and special causes of variation and, consequently, the implementation of appropriate action on the work stations.