SUPRAYOGI, Anjar. APLIKASI PENDEKATAN SIX SIGMA UNTUK PERBAIKAN KUALITAS PADA PROSES PEMBUATAN TANK WASHER. Operations Excellence: Journal of Applied Industrial Engineering, Jakarta, Indonesia, v. 10, n. 3, p. 285–293, 2018. DOI: 10.22441/oe.v10.3.2018.008. Disponível em: https://publikasi.mercubuana.ac.id/index.php/oe/article/view/4370. Acesso em: 4 jun. 2026.