Rustandi, D. A., Sukanta, S., & Darajatun, R. A. (2025). Preventive maintenance scheduling using the periodic replacement and repair count limit policy approach on the Vacotin water heaters machine at PT XYZ. Operations Excellence: Journal of Applied Industrial Engineering, 17(2), 178–189. https://doi.org/10.22441/oe.2025.v17.i2.142