Model Criteria for maintenance Repair period
Model 1 (PFM_FRP) ⦁ PFM : Period fixed maintenance ⦁ FRP : Fixed repair period
Model 2 (PFM_NRP) ⦁ PFM : Period fixed maintenance ⦁ NRP : Non-fixed repair period
Model 3 (FFM_FRP) ⦁ FFM : Failure rate fixed maintenance ⦁ FRP : Fixed repair period
Model 4 (FFM_NRP) ⦁ FFM : Failure rate fixed maintenance ⦁ NRP : Non-fixed repair period