“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): 59-72. https://doi.org/10.21070/prozima.v7i1.1612.