Planned Maintenance

Planned Preventive Maintenance ('PPM') or more usual just simple Planned Maintenance (PM) or Scheduled Maintenance is any variety of scheduled maintenance to an object or item of equipment. Specifically, Planned Maintenance is a scheduled service visit carried out by a competent and suitable agent, to ensure that an item of equipment is operating correctly and to therefore avoid any unscheduled breakdown and downtime.

Together with Condition Based Maintenance, Planned maintenance comprises preventive maintenance, in which the maintenance event is preplanned, and all future maintenance is preprogrammed. Planned maintenance is created for every item separately according to manufacturers recommendation or legislation. Plan can be based on equipment running hours, date based, or for vehicles distance travelled. A good example of a planned maintenance program is car maintenance, where time and distance determine fluid change requirements. A good example of Condition Based Maintenance is the oil pressure warning light that provides notification that you should stop the vehicle because failure will occur because engine lubrication has stopped.

Planned maintenance has some advantages over Condition Based Maintenance such as:

  • easier planning of maintenance and ordering spares,
  • costs are distributed more evenly,
  • no initial costs for instruments for supervision of equipment.

Disadvantages are:

  • less reliable than equipment with fault reporting associated with CBM
  • more expensive due to more frequent parts change.
  • requires training investment and ongoing labor costs

Parts that have scheduled maintenance at fixed intervals, usually due to wearout or a fixed shelf life, are sometimes known as time-change interval, or TCI items.

Read more about Planned Maintenance:  See Also

Famous quotes containing the words planned and/or maintenance:

    Every day care center, whether it knows it or not, is a school. The choice is never between custodial care and education. The choice is between unplanned and planned education, between conscious and unconscious education, between bad education and good education.
    James L. Hymes, Jr. (20th century)

    War is in truth a disease in which the juices that serve health and maintenance are used for the sole purpose of nourishing something foreign, something at odds with nature.
    Johann Wolfgang Von Goethe (1749–1832)