Sudarwan, Achmad Nurohim, Dominicus Sutrisno Hadi, Tantri Yanuar Rahmat Syah, and Eka Angga laksana. 2020. “Health Service Process: Lean Six Sigma Concept for Hospitals (Casemix Hospitals)”. International Journal of Psychosocial Rehabilitation 24 (1): 3494-3505. https://doi.org/10.61841/w4cx0b88.