Implementation of the seven tools method for controlling cardboard box quality at PT. SGM. WAKTU: Jurnal Teknik UNIPA, [S. l.], v. 22, n. 02, p. 94–103, 2024. DOI: 10.36456/waktu.v22i02.9366. Disponível em: https://jurnal.unipasby.ac.id/waktu/article/view/9366. Acesso em: 5 aug. 2026.