Siskayanti, Rini, and Hardianto Iridiastadi. “Implementing Quality Function Deployment (QFD) to Enhance Competitiveness and User Satisfaction in Industrial Lubricants”. SAINTEKS : Jurnal Sain dan Teknik 7, no. 01 (March 27, 2025): 54–64. Accessed June 23, 2026. https://ejournal.uicm.ac.id/index.php/sainteks/article/view/868.