Anggriawan, Akbar, 		Susilawati, Anita, AND 		Mainil, Rahmat.
" Optimizing Steam to Electricity Ratio in Crude Palm Oil Refinery Captive Power Plant: A Six Sigma-DMAIC Capability Assessment" <em>Journal of Ocean, Mechanical and Aerospace -science and engineering-</em> [Online], Volume 69 Number 3 (3 December 2025)