Andriani, Andriani, and Ikhsan Romli. “Preventive Maintenance Pada Mesin Die Casting Dengan Age Replacement Model Untuk Peningkatan Reliabilitas Mesin”. Operations Excellence: Journal of Applied Industrial Engineering, vol. 12, no. 1, Mar. 2020, pp. 1-12, doi:10.22441/oe.2020.v12.i1.001.