Athmane, Dr.Mechenene, and Aouag Hichem. “Process Optimization by DMAIC Approach in Algerian Industry”. INTERNATIONAL JOURNAL OF MANAGEMENT & INFORMATION TECHNOLOGY 7, no. 2 (November 30, 2013): 1074–1083. Accessed May 18, 2024. https://rajpub.com/index.php/ijmit/article/view/3181.