Developing Standard Operating Procedure for Production in North Sumatra Construction Companies. JKIE (Journal Knowledge Industrial Engineering), [S. l.], v. 8, n. 2, p. 82–89, 2021. DOI: 10.35891/jkie.v8i2.2524. Disponível em: https://jurnal.yudharta.ac.id/v2/index.php/jkie/article/view/2524. Acesso em: 2 aug. 2026.