Ali Mahmood hasen, Sura Naufel Bahjat, Ban Majid Sadeq. STUDYING THE POSSIBILITY OF APPLYING SIX SIGMA STRATEGY TO INCREASE PERFORMANCE EFFICIENCY AND QUALITY OF HEALTH SECTOR SERVICES. Wor.econo. and fin. Bul. [Internet]. 2022Apr.8 [cited 2024Nov.16];9:25-39. Available from: https://scholarexpress.net/index.php/wefb/article/view/775