Fitra, Fitra, Rizky Sijabat, and Yusrizal Yusrizal. “Analisis Pengendalian Kualitas Usaha Dagang Batako Rafli Menggunakan Metode Six Sigma”. Jurnal ARTI (Aplikasi Rancangan Teknik Industri) 20, no. 1 (May 31, 2025): 17–24. Accessed July 27, 2026. https://ejurnal.itbriaupesisir.ac.id/index.php/arti/article/view/1121.