Enhancing Automotive Part Quality in SMEs through DMAIC Implementation: A Case Study in Indonesian Automotive Manufacturing

Abstract

Purpose: The purpose of this study is to reduce defects and improve the quality of automotive parts at SMEs by implementing the define, measure, analyze, improve, and control (DMAIC) stage of Six Sigma. Methodology/Approach: The application of the DMAIC method was carried out in an automotive component manufacturing company in Indonesia that produces Stay B Muffler Protector HC21 as a research object. The cause of the high number of product defects is known at the define stage. In the measure stage, details from field data are collected and sigma levels are determined. Findings: The results of the improvement actions taken have an impact on the DPMO value and an increase in the sigma level. DPMO value decreased by 19,891 from 22,230 to 2,339. Meanwhile, the sigma level increased by 0.82 from 3.51 to 4.33. To control the sigma level, it is proposed that improvement be carried out by making work instructions for the use of spot welding tools so that it can be standardized, controlled continuously, and make continuous improvements. Research Limitation/implication: Limitations of this study may include limitations in covering all aspects of production or other factors that may affect product quality. Originality/Value of paper: The originality of this paper lies in the application of the DMAIC method of Six Sigma in the context of automotive manufacturing SMEs in Indonesia.