<![CDATA[Every manufacturing company generally aims to achieve the highest product quality to ensure customer satisfaction and maintain market competitiveness. PT. XYZ, a Japanese company specializing in automotive lighting and located in Tangerang Regency, Banten, faces challenges in maintaining production quality, particularly in its main product— motor vehicle lamps. The production process includes injection molding, aluminum metalizing, and assembly. However, defective products, especially those with weld line defects, remain a recurring issue, impacting production efficiency in terms of cost and time. During several months, a total of 588 defective products were recorded out of 148,526 units. This study observed a defect rate of 34% (200 units), which significantly exceeds the company’s quality target of a 2% defect rate. To address this, a structured quality improvement effort is necessary. This research applies the Six Sigma methodology as a quality control tool to identify, analyze, and minimize product defects. The objectives of this study are to provide a general overview of PT. Indonesia Stanley Electric, identify types of product defects, calculate the Defects Per Million Opportunities (DPMO), and propose strategies to achieve zero defect targets. Through this approach, the company is expected to continuously improve product quality in a more efficient and sustainable manner.]]>
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