“Analysis of Self-Estimated Pricing (HPS) in the Procurement Department Units 1&2 PT. PJB UP Paiton: Analisis Penentuan Harga Perkiraan Sendiri (HPS) di Bagian Pengadaan Unit 1&2 PT. PJB UP Paiton ” (2023) PROZIMA (Productivity, Optimization and Manufacturing System Engineering), 7(1), pp. 59–72. doi:10.21070/prozima.v7i1.1612.