What is Preventative Maintenance?



Definition

Preventative maintenance is service that is regularly performed to lessen the likelihood of it failing. Preventative maintenance is performed while the equipment is still working, so that it does not break down unexpectedly.

The maintenance is scheduled based on a time schedule. An example is an HVAC unit which is serviced every year, before summer.

Why it Matters

Advantages of preventative

  • Planning is the biggest advantage of preventative maintenance over less complex strategies
  • Unplanned , reactive maintenance has many overhead costs that can be avoided during the planning process. When maintenance is planned, these costs can be reduced
  • Equipment can be shut down to coincide with occupancy downtime
  • Prior to the shutdown, any required parts, supplies and personnel can be gathered to minimize the time taken for a repair


Disadvantages of preventative maintenance

  • Preventative maintenance is more complex to coordinate than reactive maintenance because the maintenance schedule must be planned
  • The frequency of preventative maintenance is most likely too high. This frequency can be lowered, without sacrificing reliability when condition monitoring and analysis is used


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