Analisis Kualitas Produk Gula dengan Menggunakan Metode Six Sigma (PT Madukismo Yogyakarta)

This study aims to analyze the quality of granulated sugar products at PT Madukismo Yogyakarta using the Six Sigma methodology through the DMAIC approach (Define, Measure, Analyze, Improve, and Control). The main problems identified involve high variations in product quality and significant defects, particularly related to moisture content (less dry) and off-color products. Production and defect data from May 2023 to September 2024 were used to calculate DPMO and sigma levels as indicators of process performance. The results show that the sigma level ranges from 4.48 to 5.03, with the highest DPMO recorded at 1,456.76 and the lowest at 205.55, indicating that the process has not yet achieved Six Sigma performance. Pareto analysis reveals that color defects (58.4%) contribute the most to overall defects. The Fishbone diagram analysis indicates that defect causes originate from factors related to manpower, method, material, machine, measurement, and environment. Improvement recommendations include digitalizing monitoring systems, enhancing SOPs, upgrading operator competencies, modernizing machinery, improving raw material management, and strengthening environmental control systems. These improvements are expected to reduce DPMO to below 500 and increase the sigma level to at least 5.2. This study concludes that the Six Sigma approach is effective in identifying quality issues and formulating strategies to improve the quality of granulated sugar products at PT Madukismo.