Tahir, Ade Putra, Suwardi Gunawan, and Theresia Amelia Pawitra. 2024. “Analysis Productivity of the Mine Facility Department Using the Objective Matrix Method (OMAX): Case Study in Coal Mining Company”. Operations Excellence: Journal of Applied Industrial Engineering 15 (3). Jakarta, Indonesia:263-73. https://doi.org/10.22441/oe.2023.v15.i3.092.