Wardhana, Rahardi, and Lukmandono. 2021. “Design Cost Control in Risk Management With the Expected Money Value (Emv) and Hirarc Method at Pt Xyz Jawa Timur Surabaya: Desain Cost Control Pada Risk Management Dengan Metode Expected Money Value (Emv) Dan Hirarc Di Pt Xyz Jawa Timur Surabaya”. PROZIMA (Productivity, Optimization and Manufacturing System Engineering) 4 (1):12-22. https://doi.org/10.21070/prozima.v4i1.1276.