Andriani, Andriani, and Ikhsan Romli. 2020. “Preventive Maintenance Pada Mesin Die Casting Dengan Age Replacement Model Untuk Peningkatan Reliabilitas Mesin”. Operations Excellence: Journal of Applied Industrial Engineering 12 (1). Jakarta, Indonesia:1-12. https://doi.org/10.22441/oe.2020.v12.i1.001.