Preventive maintenance (PM) has the following meanings:
- The care and servicing by personnel for the purpose of maintaining equipment and facilities in satisfactory operating condition by providing for systematic inspection, detection, and correction of incipient failures either before they occur or before they develop into major defects.
- Preventive maintenance tends to follow planned guidelines from time-to-time to prevent equipment and machineries breakdown (Olakotan, 2015).
- According to Bamiro, Nzediegwu, Oladejo, Rahaman and Adebayo (2011) , preventive maintenance is the work carried out on equipment in order to avoid its breakdown or malfunction. It is a regular and routine action taken on equipment in order to prevent its breakdown
- Maintenance, including tests, measurements, adjustments, parts replacement, and cleaning, performed specifically to prevent faults from occurring.