Metodología Dmaic Six Sigma para el control de la calidad del calzado de seguridad en la empresa Calzado Sinell

Abstract

The footwear industry suffered a severe impact in recent years as an effect of the confinement due to the 2020 pandemic, causing an 80% reduction in footwear production with respect to the previous year, leading to the closure of several companies or mass layoffs, especially for small and medium enterprises. Due to this situation, it was decided to control the quality of safety footwear by applying the DMAIC Six Sigma methodology at Calzado SINELL, aiming to improve production quality and maintain competitiveness in the market. The methodology used in the project was descriptive and field, applying the 4 phases of the DMAIC Six Sigma methodology (Define, Measure, Analyze, Improve) to the highest-demand product of the company Calzado Sinell over a period of 5 weeks of analyzed production. The main quality problem occurs in the sole attachment process and is the "excess or shortage of glue," representing 40% of all defects found. The Six Sigma analysis reveals that the process is currently unstable and out of statistical control, resulting in approximately 66 807 units are produced outside their specifications for every million produced, with a yield of 93,82% and a sigma level of 3,04. It concludes that the company does not perform adequate quality control on its product, leading to excessive process variability. This problem is caused by the lack of technical specifications and standardized processes.