Preventive Maintenance
Preventive Maintenance (PM) refers to scheduled maintenance activities performed on equipment and assets to prevent failures before they occur. Unlike reactive maintenance that responds to breakdowns, preventive maintenance proactively addresses potential issues based on time intervals, usage metrics, or condition indicators to extend asset life and reduce unplanned downtime.
Key Points
- Scheduled maintenance performed before failures occur
- Can be time-based (calendar), usage-based (hours/cycles), or condition-based
- Reduces unplanned downtime and emergency repairs
- Extends asset useful life and improves reliability
- Typically managed through CMMS software with automated scheduling
Types of Preventive Maintenance
Time-Based Maintenance
Maintenance scheduled at fixed calendar intervals regardless of usage. Examples: monthly filter changes, annual inspections, quarterly lubrication.
Usage-Based Maintenance
Maintenance triggered by usage metrics like operating hours, cycles, or mileage. Examples: oil change every 5,000 km, belt replacement every 10,000 hours.
Condition-Based Maintenance
Maintenance triggered by actual asset condition indicators. Examples: vibration analysis, thermal imaging, oil analysis. Also called predictive maintenance when using advanced sensors.
Preventive vs Reactive Maintenance
Reactive (or corrective) maintenance responds to failures after they occur. While sometimes unavoidable, reactive maintenance is typically 3-9 times more expensive than preventive maintenance due to emergency labor costs, expedited parts, production losses, and potential collateral damage. A balanced maintenance program includes both PM and planned corrective work.
Benefits of Preventive Maintenance
- Reduced downtime: Scheduled maintenance during planned windows vs. unexpected breakdowns
- Extended asset life: Regular care prevents accelerated wear and degradation
- Lower total costs: Preventing failures is cheaper than emergency repairs
- Improved safety: Regular inspections catch hazards before incidents
- Better planning: Predictable maintenance enables resource scheduling
- Compliance: Many regulations require documented preventive maintenance
Implementing PM in CMMS
CMMS software automates preventive maintenance by scheduling work orders based on defined triggers (time, usage, or condition thresholds). The system tracks completion, records maintenance history, and provides visibility into PM compliance rates. Effective PM programs typically achieve 80-90% PM compliance with the remaining work being planned corrective maintenance.
Automate Preventive Maintenance with AssetLab
AssetLab provides the tools you need to put these concepts into practice with Canadian data residency and CAD pricing.