Bachtiar, M., Said Salim Dahda, and Elly Ismiyah. “ANALISIS PENGENDALIAN KUAITAS PRODUK PAP HANGER MENGGUNAKAN METODE SIX SIGMA DAN FMEA DI PT. RAVANA JAYA MANYAR GRESIK”. JUSTI (Jurnal Sistem dan Teknik Industri) 1, no. 4 (July 26, 2021): 609–618. Accessed June 12, 2025. https://journal.umg.ac.id/index.php/justi/article/view/2924.