Alfiandi, Ahmad, Triwulandari S.D, and Rina Fitriana. 2025. “Quality Improvement of DB-CDP With Integration of CRISP-DM and Six Sigma Method”. Operations Excellence: Journal of Applied Industrial Engineering 16 (3). Jakarta, Indonesia:309-18. https://doi.org/10.22441/oe.2024.v16.i3.126.