Design and Development of a Customer Satisfaction Measurement Information System for the Sahabat Daya Universitas (SDU) Program at PT. BTPN Syariah Using the SERVQUAL & Importance-Performance Analysis (GAP) Method. JURTIK. 2023;12(2):1-12. doi:10.58761/jurtikstmikbandung.v12.i2.131