Hlongwane, Sanelisiwe, Chipo Ngongoni, and Sara S (Saartjie) Grobbelaar. “A PATIENT-CENTRIC SIX-SIGMA DECISION SUPPORT SYSTEM FRAMEWORK FOR CONTINUOUS QUALITY IMPROVEMENT IN CLINICS”. The South African Journal of Industrial Engineering 30, no. 3 (November 15, 2019): 224–237. Accessed February 23, 2024. http://sajie.journals.ac.za/pub/article/view/2241.