ELSAGHIER, M. A.; AMER, A. S.; ELRIFAI, R. A.; ELSGHIER, E. H. Six Sigma Roles for the Improvement of Company Manufacturing Processes and Waste Reduction. مجلة البحوث الأكاديمية, [S. l.], v. 29, n. 2, p. 50–61, 2025. Disponível em: https://lam-journal.ly/index.php/jar/article/view/1248. Acesso em: 11 2025.