Saswattecha Nantakrit Yodpijit, Somjai Wangrakdiskul, Nattaya Charoensuk, Kanyarat Phromphat and Chalita Boonmee 2025. Sustainable Quality Transformation In Agro-Industrial Manufacturing: A Six Sigma–Kaizen Model For Thailand’s Crude Palm Oil Sector. Jurnal Riset Ilmu Teknik. 3, 2 (Sep. 2025), 125–140. DOI:https://doi.org/10.59976/jurit.v3i2.195.