Sugandi, B.A. et al. 2025. Comparative Analysis of Repair Policy and Preventive Maintenance Policy Methods in Machine Maintenance on the Production Floor of PT. Metro Riau. IJIEM - Indonesian Journal of Industrial Engineering and Management. 6, 2 (Oct. 2025), 218–227. DOI:https://doi.org/10.22441/ijiem.v6i2.31177.