Adi, Daniel Putut Kuncoro, and Basri Fahriza. 2026. “Analysis of the Impact of Spare Part Availability and Procurement Lead Time on Maintenance Operational Performance (Case Study: Batam Aero Teknik (BAT), Batam)”. Dinasti International Journal of Education Management and Social Science 7 (5):4703-13. https://doi.org/10.38035/dijemss.v7i5.6919.