Odies S, Y. and Cahyana, A.S. 2026. Design of Preventive Maintenance Scheduling for Vacuum Feeder Line 4 Machine Using Microsoft Project Based on Pareto Analysis to Reduce Downtime: Perancangan Penjadwalan Preventive Maintenance Mesin Vacuum Feeder Line 4 Menggunakan MS Project Berdasarkan Analisis Pareto Untuk Mengurangi Downtime. Indonesian Journal of Innovation Studies. 27, 2 (Oct. 2026), 10.21070/ijins.v27i2.2439. DOI:https://doi.org/10.21070/ijins.v27i2.2439.