times. Another drawback is that repair costs are usually higher than maintenance expenses because a failure often requires more extensive work than would have been necessary if the vehicle had not been run to failure.
2. CORRECTIVE MAINTENANCE
This is maintenance done to identify and correct a problem with equipment and get it back to an operational or optimum condition. Corrective maintenance can be planned/scheduled (a repair is required but doesn’t have to be made right away), or unplanned/ unscheduled (when a vehicle shows signs of potential failure or fails unexpectedly). Corrective maintenance is typically less efficient and more costly than preventive, routine or planned maintenance since the work is not planned for in advance.
3. PREVENTIVE MAINTENANCE
This is maintenance performed at predetermined intervals or done according to prescribed criteria of time and/or usage. The objective is to increase equipment efficiency, reliability and life by conducting the scheduled, routine maintenance activities recommended by the OEM to detect and reduce or prevent breakdowns from occurring. A downside to this maintenance strategy is that if maintenance schedules are not regularly monitored, audited and improved, there is the risk of over-scheduling because the maintenance is planned on time or usage rather than actual equipment conditions.
4. CONDITION-BASED MAINTENANCE
This strategy is based on performance monitoring of a vehicle
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while it is in operation. Real-time data is gathered from sensors and other devices that measure specific conditions against known parameters of failure. Then, action can be taken only when indicators show signs of decreasing performance but before component failure. This allows vehicles and equipment to remain productive for as long as possible and helps avoid costly downtime. Moreover, with condition-based maintenance, rather than scheduling maintenance based on miles or time intervals, maintenance can be performed on an as-needed basis.
5. PREDICTIVE MAINTENANCE
Like condition-based maintenance, predictive maintenance is a proactive maintenance strategy intended to improve equipment reliability and decrease downtime. It, too, is based on the actual condition and performance