Putri Maria Angelina, Hafni, and Muhammad Zen. “Design of a Web-Based Employee Performance Appraisal System at PT PLN Icon Plus Medan Using the Design Thinking Method”. Instal : Jurnal Komputer, vol. 18, no. 02, Apr. 2026, pp. 188-96, doi:10.54209/jurnalinstall.v18i02.502.