Your question is pretty vague so unfortunately my answer will be vague as well. It really depends on what type of system you have that is getting pm'd, and how thorough the contractor doing the work is. Generally air filters, fuel filters, tightening electrical connections, checking voltage / amperage, cleaning coils, checking combustion, checking refrigerant charge, etc.
4 types reactive- response to equipment malfunction preventive- periodic checks predictive- periodic measurements and trending of equipment process prevention- equipment design is based on minimal maintenance requirements
The preventive maintenance of steam turbine mainly entails frequent servicing of the parts. This will ensure a smooth performance of the steam turbine.
The answer is time and money. Preventive maintenance reduces downtime and cost associates with hardware failures and software obsolescence. Preventive maintenance helps provide high level of availability of system function and obtains great return on investments of hardwares and softwares.
Preventive Maintenance is the meaning of PM.
Changing the oil in your car
documenting the details and frequency of each maintenance task.
explanation
A preventive maintenance plan tends to evolve from a history or pattern of malfunction within an organization.
Caring for a computer is called maintenance or preventive maintenance.
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Preventive Maintenance.