Siswanto, Budi, Adithya Sudiarno, Putu Dana Karningsih, and Henry Pariaman. “Improvement of Preventive Maintenance Process Effectiveness in Insourcing and Outsourcing Scheme With House of Risk (HOR) Method Approach (A Case Study)”. IPTEK The Journal for Technology and Science 30, no. 2 (July 1, 2025): 52–55. Accessed January 30, 2026. https://journal.its.ac.id/index.php/jts/article/view/4340.