SAPUTRA, Rudi; JATI NUGROHO, Andung. Pengendalian Kualitas Produk Bubuk Kopi Menggunakan Metode Six Sigma. Cosmic Jurnal Teknik, [S. l.], v. 3, n. 2, p. 73–81, 2026. DOI: 10.55537/cosmic.v3i2.1561. Disponível em: https://journal.aira.or.id/cosmic/article/view/1561. Acesso em: 25 jun. 2026.