Dimas, D. and Lubis, A.H. 2025. Public Complaints Application at Binjai City Police Using the Waterfall Method to Improve the Performance of Binjai District Police. Journal of Computer Science and Informatics Engineering . 4, 3 (Jun. 2025), 122–134. DOI:https://doi.org/10.55537/cosie.v4i3.1130.