UM MODELO DE PROGRAMAÇÃO LINEAR INTEIRA NO PLANEJAMENTO DEPRODUÇÃO DE UMA USINA SIDERURGICA PARA PRODUÇÃO DE CHAPASGROSSAS

Abstract

This study presents a linear optimization model to support production planning decisions for a plate product line over a medium to long term horizon. With the objective of maximizing the contribution margin, it deals with the reduction of the electric energy consumption of the processes of this line and the influence of the different products produced on the consumption result considering the possibility of producing for inventories. With process data collection, process and production line constraints were defined, different aspects of process consumptions, as well as the use of the production planning horizon to be applied to the optimization model. From the analysis of the results it was possible to identify that the model was able to visualize the operational characteristics of the products and processes in the current scenario in the scenario proposed by the model and point out the best product groupand production volume in the periods. Being that, at the end of the planned horizon and in comparison to the real planning adopted by the company, it brought a better result in the profitability from the reduction of the energy consumption. Finally, the use of the proposed resource allowed for the aggregate planning of plate production in an enriching way.