<Li> 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 . </Li> <Li> Maintenance, including tests, measurements, adjustments, parts replacement, and cleaning, performed specifically to prevent faults from occurring . </Li> <P> The primary goal of maintenance is to avoid or mitigate the consequences of failure of equipment . This may be by preventing the failure before it actually occurs which Planned Maintenance and Condition Based Maintenance help to achieve . It is designed to preserve and restore equipment reliability by replacing worn components before they actually fail . Maintenance activities include partial or complete overhauls at specified periods, oil changes, lubrication, minor adjustments, and so on . In addition, workers can record equipment deterioration so they know to replace or repair worn parts before they cause system failure . The ideal machine maintenance program would prevent any unnecessary and costly repairs . </P> <P> Machine maintenance for various equipment and facilities is quite nuanced . For instance, maintaining certain equipment may include a "preventive maintenance checklist" which includes small checks which can significantly extend service life . Furthermore, other considerations such as weather and equipment are taken into account; for instance, in the case of HVAC systems, maintenance is often performed before the hottest time of the year . </P>

What is the meaning of preventive maintenance in hindi