A preventive maintenance program is scheduled or routine maintenance that is performed to reduce the likelihood of asset failure. Everything from adjustments and cleaning to lubrication and part replacements can be a form of preventative maintenance. Preventive maintenance is scheduled based either on a time-based or usage-based trigger.
Time-based preventive maintenance
This form of routine maintenance is based on planned time intervals and is performed regardless of asset condition. Assets vary, and the maintenance intervals for different assets will vary. The goal is to identify the maximum time interval that a piece of equipment will operate successfully and then schedule the routine maintenance accordingly. This approach is reliant on the assumption that the asset’s failure can at least in part be predicted by time. Having your car serviced every six months is an example of time-based preventive maintenance.
Usage-based preventive maintenance
This approach is based on usage triggers instead of fixed time intervals. Examples of usage-based maintenance include actions after a certain amount of cycles, miles, or hours of operation. These triggers are based on meter readings. Continuing the example of a car, having it serviced every 3,000 miles is usage-based maintenance.