Aplicação de técnicas de delineamento de experimentos (DOE) no estudo de acréscimo de atenuação em cabos low friction

Abstract

Quality improvement is a crucial theme in the industrial landscape, especially in the face of increasing market competitiveness. This study proposes a detailed approach to implementing the DMAIC cycle (Define, Measure, Analyze, Improve, Control) to assess the root causes of non-quality in the attenuation of low-friction optical cables. Focusing on the statistical influence of machines and optical fiber suppliers on final attenuation, Design of Experiments (DOE) techniques were applied. Considering that the company adopts statistical methods aimed at corrective actions, without identifying the relationship between the factors in the main problem and facing high costs due to rejections and rework, this study sought to collaborate in taking action to reduce these losses. It was found that machines and suppliers, individually and together, contribute to the increase in attenuation and, consequently, to financial losses and increased scrap. The results obtained validated that specific combinations of machine and supplier impact the increase in attenuation, resulting in the recommendation to implement this study and the proposed action plans to monitor variations in the quality of attenuation in low-friction optical cables manufactured. Therefore, this project found that supplier 2 with machine 1 generates more losses, and supplier 2 and machine 2 generate higher quality for the low-friction optical cable for the industry studied, enabling the implementation of predictive actions to reduce the increase in attenuation directed at relevant factors and providing opportunities for expanding techniques to more variables and other products.