Predictive vs. Preventive vs. Reactive Maintenance
Most organizations use all three maintenance strategies simultaneously — reactive for some equipment, preventive for others, and predictive for a small subset of high-criticality assets. The question is not which strategy to use, but which strategy to apply to which equipment. Getting that match right drives down total maintenance cost while reducing the equipment failures that generate safety incidents and liability exposure.
The optimal maintenance strategy for any piece of equipment is determined by three factors: the consequence of failure (safety, liability, and operational impact), the relationship between equipment age and failure probability (does PM actually reduce failure risk?), and the cost comparison between PM investment and failure cost. Incident data from IncidentVault provides the failure cost evidence that makes this analysis quantitative rather than intuitive — identifying which equipment failures have generated the highest incident costs and therefore warrant the most intensive maintenance strategy.
Reactive Maintenance — Run to Failure
Reactive maintenance (also called run-to-failure or corrective maintenance) means operating equipment until it fails and then repairing or replacing it. Despite its reputation as an inferior strategy, reactive maintenance is actually the correct choice for a significant category of equipment.
When reactive maintenance is the right choice:
- Failure consequences are low — when equipment failure causes minor inconvenience but not safety risk, significant liability, or major production impact
- Failure is not age-related — for equipment with random failure modes where PM tasks don’t actually reduce failure probability (light bulbs, for example, fail randomly not according to age)
- Repair cost is less than PM investment — when the cost of regular PM exceeds the expected cost of occasional failures plus repair
- Redundancy exists — when a failed component can be immediately replaced from stock without operational impact
When reactive maintenance creates liability exposure: Equipment that creates safety risk when it fails — guest-accessible equipment, employee safety equipment, public-facing facilities — should never be managed reactively. A loose railing that “will be fixed when it becomes a problem” is a reactive strategy that creates premises liability. An unreinforced floor that is allowed to deteriorate until failure is a reactive strategy that creates both safety and liability consequences. IncidentVault’s equipment incident history identifies which equipment failures have actually produced incidents — directing PM investment away from reactive management for high-consequence equipment.
Preventive Maintenance — Scheduled Tasks
Preventive maintenance involves scheduled tasks performed on equipment at defined intervals — regardless of its apparent condition — to prevent failure before it occurs. PM is the most common formal maintenance strategy and the default choice for most managed equipment.
PM works best when:
- Equipment has an identifiable wear or degradation mechanism — components that wear according to time or cycles (belts, filters, lubricants, cutting surfaces)
- Failure consequences are significant — safety incidents, liability exposure, significant downtime
- PM tasks can detect the failure mechanism before it produces failure — inspection can find a worn component before it fails completely
⚠️ Reactive (No PM)
- Failures are unplanned and unpredictable
- Emergency repair costs 3–5× planned repair
- Downtime is unplanned and operationally disruptive
- Safety and liability incidents occur
- Equipment fails completely — often more expensive to repair
✅ Preventive Maintenance
- Failures predicted and prevented before occurrence
- Planned repair at standard cost
- Downtime planned during low-impact windows
- Safety and liability incidents reduced
- Components replaced at optimal wear — less total cost
Predictive Maintenance — Condition Monitoring
Predictive maintenance (PdM) uses condition monitoring technology — vibration analysis, thermography, oil analysis, ultrasound — to detect the actual condition of equipment and predict failures before they occur. PdM is the most sophisticated strategy and appropriate for a select subset of high-criticality equipment.
PdM is appropriate when:
- The equipment is high-criticality — failure consequences are severe enough to justify monitoring technology investment
- Monitoring technology can detect the failure mechanism in advance — not all failure modes are detectable by available technology
- The failure develops gradually enough to allow intervention — sudden failure modes don’t allow condition monitoring to help
- The cost of monitoring is justified by the value of predicted maintenance intervals vs. fixed PM schedules
How Incident Data Informs Maintenance Strategy Selection
The most common mistake in maintenance strategy selection is applying the same strategy to all equipment without analyzing the actual cost of failures. IncidentVault’s equipment incident data enables a data-driven strategy assignment:
Equipment Failure Cost Analysis
Export equipment-related incident records from IncidentVault with associated claim costs, downtime costs, and emergency repair costs — sorted by equipment category. Equipment with the highest total failure costs gets the most intensive maintenance strategy; equipment with minimal failure costs may be appropriately managed reactively.
Failure Frequency Analysis
Identify which equipment fails repeatedly — the same machine appearing in multiple incidents. Repeat failures on the same equipment, especially after reactive repair, signal that a PM program would prevent recurrence where reactive management produces recurring costs.
Liability Consequence Assessment
Equipment failures that generated GL or workers’ comp claims should be assigned PM programs regardless of PM cost — because the liability consequence makes reactive management unacceptably risky. IncidentVault’s incident-to-claim linking shows directly which equipment failures produced claims.
Incident data tells you which equipment needs PM. IncidentVault provides the data.
IncidentVault’s equipment incident history, failure cost analytics, and incident-to-claim linking give maintenance managers the data foundation for strategy selection that intuition and experience alone cannot provide.
