Uma laminação conectada : avaliação de eficiência no setor siderúrgico utilizando Network DEA através do benchmarking interno

Abstract

Companies are constantly seeking to improve the productivity and efficiency of their processes. In the global steel market, there are challenges related to international competition, especially with low-cost products. In Brazil, the steel industry is looking for solutions to make its processes more efficient, thus reducing losses, which in turn has a positive impact on the plants' revenue. Among the various production processes in the steel sector, the relevance of rolling bars and profiles stands out, due to its range of products that range from industries to civil construction. However, many studies focus mainly on evaluating the efficiency of your system but are unable to assess whether the sub-processes that make up the system have a positive impact on overall efficiency. of a company that manufactures bars and profiles, using Network DEA (NDEA) through internal benchmarking. To this end, a case study was carried out, where it was possible to analyze the overall efficiency of the network, which obtained an average efficiency of 41.99%, traveling with a minimum efficiency of 15.12% and a maximum efficiency of 99.23%. It was possible to analyze the efficiency of each of the advances that the composition, where we will see that the third stage scores are improved for global efficiency. Finally, it was possible to carry out an analysis of critical incidents that affected global efficiency, highlighting that 66.67% of incidents occurred in the 4th quarter of each year.