2025. ASSESMENT OF INTERNAL SERVICE QUALITY DIMENSIONS USING THE TOPSIS METHOD TO IMPROVE SERVICE QUALITY AT THE OUTPATIENT REGISTRATION SITES AISYIYAH SITI FATIMAH TULANGAN HOSPITAL. International Journal of Economic Integration and Regional Competitiveness. 2, 10 (Oct. 2025), 55–72. DOI:https://doi.org/10.61796/ijeirc.v2i10.381.