Preventive maintenance is maintenance that is regularly performed on a piece of equipment tolessen the likelihood of it failing. It is performed while the equipment is still working so that it doesnot break down unexpectedly.
The main goal behind PM is for the equipment to make it from one planned service to the nextplanned service without any failures caused by fatigue, neglect, or normal wear (preventable items),which Planned Maintenance and Condition Based Maintenance help to achieve by replacing worncomponents before they actually fail.
Maintenance activities include partial or complete overhaulsat specified periods, oil changes, lubrication, minor adjustments, and so on. In addition, workers canrecord equipment deterioration so they know to replace or repair worn parts before they causesystem failure.