PENGENDALIAN KUALITAS PRODUK PLASTIK MENGGUNAKAN SIX SIGMA GUNA MENINGKATKAN DAYA SAING. JOURNAL OF RESEARCH AND TECHNOLOGY [Internet]. 2023 Jul. 19 [cited 2025 Jun. 29];9(1):33-46. Available from: https://journal.unusida.ac.id/index.php/jrt/article/view/888