Electric Power 6. Salvage Operations s i s y l g a n n i A t y n t i i a l P a . u 7 Q . Preventive and Predictive Maintenance 700ZB00102 4-7 PPM Decreases 1. Scrap and reject costs 2. Downtime costs 3. Cost of lost sales volume 4. Total cost of maintenance 5. Urgent or emergency interrupts due to breakdowns 6.