Preventive maintenance is planned work done before a known failure happens. Corrective maintenance is work done after a problem, fault, or failure is found.
Most organizations need both. Preventive work lowers the chance of avoidable failures, while corrective work restores equipment or facilities when something still goes wrong.
What Is Preventive Maintenance?
Preventive maintenance is scheduled or rule-based work intended to keep an asset working and reduce the chance of unexpected failure.
Examples include:
- Inspecting an HVAC system every three months.
- Changing filters on a regular schedule.
- Lubricating equipment after a set amount of use.
- Testing safety equipment at required intervals.
See Preventive Maintenance for the short definition.
What Is Corrective Maintenance?
Corrective maintenance starts after a problem is identified. The goal is to return the asset or facility to the required working condition.
That problem may be found because:
- The equipment failed.
- A user reported an issue.
- An inspection found a fault.
- Monitoring showed that something was outside its normal condition.
Corrective maintenance is not always an emergency. A problem found during an inspection can be scheduled for repair later if the asset can still be used safely.
How Do They Compare?
| Question | Preventive Maintenance | Corrective Maintenance |
|---|---|---|
| When does it happen? | Before a known failure. | After a problem or fault is found. |
| What starts it? | Time, usage, schedule, inspection plan, or another rule. | Failure, fault, report, inspection finding, or alert. |
| Main goal | Reduce failure risk and keep performance stable. | Fix the problem and restore function. |
Do You Need Both?
Usually, yes. Preventive maintenance cannot stop every fault. Corrective maintenance is still needed when something unexpected happens or an inspection finds a problem.
The right balance depends on the asset. A low-cost item with little operational risk may not justify a complex preventive plan. A critical system may need regular inspections, scheduled service, condition monitoring, and a clear corrective process.
The goal is not to eliminate corrective work. The goal is to prevent avoidable failures and make the remaining repairs easier to manage.
How Does Booking Ninjas Support Both?
Booking Ninjas' Maintenance Management tools support recurring preventive schedules, reminders, service intervals, completed and overdue task tracking, repair activity, and asset service history.
Corrective work can be organized through maintenance records and Work Order Management when a fault or service need is identified.
For the relationship between maintenance, places, and equipment, see How Maintenance Connects to Rooms and Assets.
Sources and Further Reading
- Booking Ninjas: Maintenance Management — covers preventive schedules, reminders, service history, repair activity, and maintenance tracking.
- IBM: What Is Preventive Maintenance? — defines preventive maintenance as planned work intended to reduce unexpected failure.
- IBM: What Is Corrective Maintenance? — explains corrective maintenance as work performed after a fault or failure is identified, including both immediate and planned repairs.