Análise de nível sigma pelo software Minitab fazendo uso das etapas definir, medir e analisar da ferramenta Dmaic em uma empresa do ramo metalomecânico

Abstract

The Six Sigma method is a management strategy that allows the improvement of processes that, using statistical measurements and analysis, allows leverage both the quality of processes and the profitability of the company. The present work seeks to analyze the sigma level of micro enterprise located in the central region of Santa Maria-RS using the Six Sigma methodology. The initial motivation was to introduce the business owners to the six sigma methodology and raise the question: what would be the current process level of the business and if the finished parts are meeting customer-specified specifications? Thus, the objective is to clarify to owners the level of product compliance, the process sigma level and, if necessary, the proposed improvements. In this way, the project followed the first three steps of DMAIC (define, measure, analyze) in order to find out the company's sigma level and whether products are meeting customer specifications, and thereby suggest improvements to the head of production. . The steps to implement and control aside were not used due to the fact that the implementation and control are not the focus of the work and also because of the time and the need for more resources to be properly applied. The work used tools used in the six sigma methodology and statistical analysis, such as the SIPOC flowchart (supplier, inputs, process, outputs, customer), data repeatability and reproducibility analysis, measurement amplitude, normality graphs of the collected data and, sigma level of the process, all analyzed with the aid of Minitab statistical software. As a result, the company's 0.83 sigma level and 13 non-conforming parts were discovered, which would cause major disruption to both the company and the customer, but already achieving positive results as non-standard parts could be reworked. before being sent to the client, and also considering suggestions for possible process improvements so that future errors can be avoided. Thus, with the results it was perceived by the owners that only by the first three stages of DMAIC used in the six sigma methodology is it possible to obtain great results for the company.