Shiddieq, H. A., S. R. Soenaria, and S. Handoyo. “Applying Lean Methodology to Optimize Patient Flow in JKN Outpatient Services: Evidence from a Cardiac Hospital in Indonesia”. International Journal of Science and Society, Vol. 7, no. 2, July 2025, pp. 488-01, doi:10.54783/ijsoc.v7i2.1461.