Novarika, Wirda, Mahrani Arfah, and Ridho Agustian. 2023. “Analisis Preventive Maintenance Pada Mesin Heater Kernel Dengan Metode Mean Time Between Failure Dan Mean Time To Repair”. JURNAL UNITEK 16 (2):259 -67. https://doi.org/10.52072/unitek.v16i2.544.