“Impact of Lean Manufacturing Practices on Waiting Time of Patients in Outpatient Department (OPD): A Study in the Sri Lankan Public Healthcare Industry”. International Journal of Scientific Research and Management (IJSRM) 12, no. 05 (May 12, 2024): 6320–6330. Accessed July 3, 2024. https://ijsrm.net/index.php/ijsrm/article/view/5295.