Modelagem e simulação de sistema de produção em uma indústria de confecção de roupas usando redes de PETRI

Abstract

Computational models and simulation are important tools to optimize processes, especially in industry where the improvement of the production in speed, low cost and quality can make a difference for a company. This work presents a study on a production process of a polo shirt in a company of the garment industry of the Polo Empresarial Goiás in Aparecida de Goiânia. The objective is to evaluate the manufacturing process by simulating different scenarios finding bottlenecks and point solutions that can improve the production efficiency. To this end, it is used the Petri nets formalism to model, simulate and analyze the production process. Initially, a qualitative model is used to represent the dynamic process of the manufacturing and the components to produce the polo shirt. This model is qualitatively analyzed considering the net structure and behavior. Next, the problem will be approached using a quantitative model, adding the time spent on each step of the manufacturing process, as well as the quantities of raw material used in the production of polo shirt batch, according to the data collected from in the company, as well the probability of machine defect and absenteeism. Thus, the bottlenecks that could be worked within the production sector were identified, it was highlighted the need to create more rigid controls of processes throughout production, attesting the use of Petri net formalism in the modeling and simulation of scenarios of production. The formalism was proven as a versatile, reliable and easy-to-use tool in the search for the best configuration that can meet the deadlines of the orders contracted by the customers.