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

Purpose: This study aims to reduce defects and improve the quality of automotive parts at SMEs by implementing the define, measure, analyse, 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 improvement actions results impact 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. In controlling the sigma level, improvements should be made by creating work instructions for the use of spot welding equipment so that everything can be standardised so that it can be 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: This paper's originality lies in applying the DMAIC method of Six Sigma in the context of automotive manufacturing SMEs in Indonesia.