Maintenance

The technical meaning of maintenance involves functional checks, servicing, repairing or replacing of necessary devices, equipment, machinery, building infrastructure, and supporting utilities in industrial, business, and residential installations.^[1]^[2] Over time, this has come to include multiple wordings that describe various cost-effective practices to keep equipment operational; these activities occur either before^[3] or after a failure.

"Repair" and "repairman" redirect here. For home repair, see Home repair.

Any activity—such as tests, measurements, replacements, adjustments, and repairs—intended to retain or restore a in or to a specified state in which the unit can perform its required functions.^[5]

functional unit

All action taken to retain material in a serviceable condition or to restore it to serviceability. It includes , testing, servicing, classification as to serviceability, repair, rebuilding, and reclamation.^[5]

inspections

All supply and repair action taken to keep a force in condition to carry out its mission.

[5]

The routine recurring work required to keep a facility (plant, building, structure, facility, utility system, or other real property) in such condition that it may be continuously used, at its original or designed capacity and efficiency for its intended purpose.^[5]

ground

Maintenance functions can be defined as maintenance, repair and overhaul (MRO), and MRO is also used for maintenance, repair and operations.^[4] Over time, the terminology of maintenance and MRO has begun to become standardized. The United States Department of Defense uses the following definitions:^[5]

Maintenance is strictly connected to the utilization stage of the product or technical system, in which the concept of maintainability must be included. In this scenario, maintainability is considered as the ability of an item, under stated conditions of use, to be retained in or restored to a state in which it can perform its required functions, using prescribed procedures and resources.^[6]

In some domains like aircraft maintenance, terms maintenance, repair and overhaul^[7] also include inspection, rebuilding, alteration and the supply of spare parts, accessories, raw materials, adhesives, sealants, coatings and consumables for aircraft maintenance at the utilization stage. In international civil aviation maintenance means:

This definition covers all activities for which aviation regulations require issuance of a maintenance release document (aircraft certificate of return to service – CRS).

where equipment is checked and serviced in a planned manner (in a scheduled points in time or continuously)

Preventive maintenance

where equipment is repaired or replaced after wear, malfunction or break down

Corrective maintenance

Reinforcement

[11]

This article incorporates from Federal Standard 1037C. General Services Administration. Archived from the original on 2022-01-22. (in support of MIL-STD-188).

public domain material

Maintenance Planning, Coordination & Scheduling, by Don Nyman & Joel Levitt Maintenance 978-0831134181

ISBN

Wu, S.; Zuo, M.J. (2010). (PDF). IEEE Transactions on Reliability. 59 (1): 242–249. doi:10.1109/TR.2010.2041972. S2CID 34832834. Archived (PDF) from the original on 2016-08-18.