Using lean six sigma to achieve competitive advantage Applied research in the General Company for Electrical Industries/Waziriya "Engine Lab". Journal of Madenat Alelem, [S. l.], v. 11, n. 1, p. 54–79, 2019. Disponível em: https://journal.mauc.edu.iq/index.php/JMAUC/article/view/20. Acesso em: 23 feb. 2026.