What is corrective maintenance?
Corrective maintenance is the work you do to fix something that has gone wrong. A fault is reported or found, you diagnose it, repair or replace the faulty part, test that it works and record what you did.
If preventive maintenance is the regular service that keeps equipment healthy, corrective maintenance is the visit to the doctor when something hurts. Even well-maintained equipment fails sometimes, so every service business does corrective work.
Corrective maintenance comes in two shapes: work that must be done immediately because the fault is serious or unsafe, and work that can be scheduled for a convenient time because the equipment still runs, perhaps with reduced performance.
A simple example to understand it
Meet Imran, a technician at a solar service company. A customer reports that the output of her rooftop system has fallen. The service desk records a service ticket and raises a work order.
- Diagnose: Imran finds the inverter showing a fault code. He traces it to a loose DC connector.
- Fix: He replaces the connector with one from his van stock and tightens the connections.
- Test: He restarts the system, checks the output against the expected reading and notes it.
- Record: He logs the cause, the part used, the time spent and gets the customer's sign-off.
The record matters. A month later, if the same fault returns, the history shows exactly what was done before.
Corrective vs preventive vs breakdown maintenance
| Preventive | Corrective | Breakdown | |
|---|---|---|---|
| Trigger | Schedule or usage | A fault found or reported | Equipment failure |
| Timing | Planned in advance | Often scheduled, sometimes urgent | Unplanned, immediate |
| Aim | Stop faults happening | Restore working order | Get running again |
| Cost pattern | Small and regular | Moderate | Often high |
Read more about preventive maintenance and breakdown maintenance.
Types of corrective maintenance
- Immediate corrective. The fault is serious or unsafe, so work starts straight away.
- Deferred corrective. The fault is real but the equipment can keep running, so the repair is scheduled for later, for example during the next planned visit.
Deferring is fine if the risk is understood. The danger is deferring and then forgetting.
Why tracking corrective work matters
If you only fix problems and never record them, you cannot learn from them. A good record answers useful questions:
- Which equipment fails most often?
- Which fault keeps coming back after repair?
- Which parts do we keep running out of?
- Are we spending more on repairs than on prevention?
A rise in corrective work on one asset is often a signal to change its preventive schedule.
Common mistakes with corrective maintenance
- Fixing the symptom, not the cause. If the same fault returns, the real cause was missed. Record what you found and why.
- Not recording the repair. An unrecorded fix cannot be learned from or billed.
- Turning up without the part. A diagnosis visit followed by a second visit for a part doubles the cost. Ask what likely parts to carry.
- Forgetting deferred jobs. If a job is postponed, give it a date and an owner.
- No sign-off. The client should confirm the fault is fixed before you close the job.
How ZEP360 handles corrective maintenance
In ZEP360, a complaint is logged in ZEP Customer Support with an owner and an SLA clock, and the work is scheduled and dispatched to the right technician by skill and location. The technician sees the equipment's history from past visits, spare parts used on the job are scanned from van stock, and the service cost for the visit is tracked. When the visit is done, the record stays on the equipment, so repeat faults are easy to spot. See field service management software.
Related terms
Preventive Maintenance · Breakdown Maintenance · Service Ticket · Work Order · Service Level Agreement · Annual Maintenance Contract
Frequently Asked Questions
What is the difference between corrective and preventive maintenance?
Preventive maintenance is planned in advance and aims to stop faults from happening. Corrective maintenance happens after a fault is found or reported, and aims to restore working order. Most businesses need both, with more preventive work meaning less corrective work over time.
Is corrective maintenance the same as breakdown maintenance?
They overlap but are not identical. Breakdown maintenance is repair carried out after equipment has failed completely, often urgently. Corrective maintenance is wider and includes repairs to faults found before total failure, which may be scheduled. Some firms use the terms interchangeably.
Is corrective maintenance planned or unplanned?
It can be either. A fault that stops equipment is usually unplanned and urgent. A fault found during an inspection can be planned and scheduled. The key is that it is a response to a fault, not a routine task.
Does an AMC cover corrective maintenance?
It depends on the contract. Many AMCs cover planned preventive visits and also repairs, but whether parts are included varies. Check whether the AMC is comprehensive or non-comprehensive, and what the exclusions are.
How do you reduce corrective maintenance?
Improve preventive maintenance, record every fault and cause, and look for repeat failures. Carrying common spare parts, training technicians and fixing root causes also reduce repeat visits.
What should a corrective maintenance record include?
The equipment and site, the reported fault, the cause found, the work done, the parts used, the time taken, the date and a sign-off. Keep it short enough that it gets filled in every time.
Related Terms
