Taufik, Putri NT, Kevin M. Technical Evaluation and Financial Analysis of a Retrofitting Investment Project for Production Machinery in a Cement Plant. J. Optimasi Sist. Ind. [Internet]. 2023 Dec. 20 [cited 2024 Nov. 24];22(2):215-29. Available from: https://josi.ft.unand.ac.id/index.php/josi/article/view/44