Improving The Performance of The Production Process Using Six Sigma Methodology. A Case Study at The Libyan Iron and Steel Company. Journal of Pure & Applied Sciences , [S. l.], v. 23, n. 2, p. 100–112, 2024. DOI: 10.51984/jopas.v23i2.3065. Disponível em: https://www.sebhau.edu.ly/journal/jopas/article/view/3065. Acesso em: 30 jan. 2026.