There are 9 types of maintenance split between Preventive Maintenance and Corrective Maintenance.
Preventive Maintenance is done before a failure occurs and consists of maintenance types like:
Time Based Maintenance, Failure Finding Maintenance, Risk Based Maintenance, Condition Based Maintenance and Predictive Maintenance.
Corrective maintenance is done after a failure has occurred either as Deferred Corrective Maintenance or as Emergency Maintenance.


