محمد عبد الواحد فليح, and أشواق طالب كاظم. “Using Lean Six Sigma to Achieve Competitive Advantage Applied Research in the General Company for Electrical Industries/Waziriya "Engine Lab"”. Journal of Madenat Alelem University College, Vol. 11, no. 1, Jan. 2019, pp. 54 -79, https://journal.mauc.edu.iq/index.php/JMAUC/article/view/20.