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Inflight maintenance checklist procedure before starting waste collection system repair on board the Atlantis shuttle. Corrective maintenance is a maintenance task performed to identify, isolate, and rectify a fault so that the failed equipment, machine, or system can be restored to an operational condition within the tolerances or limits established for in-service operations.
Corrective maintenance is a type of maintenance used for equipment after equipment break down or malfunction is often most expensive – not only can worn equipment damage other parts and cause multiple damage, but consequential repair and replacement costs and loss of revenues due to down time during overhaul can be significant.
Preventive action is any proactive method used to determine potential discrepancies before they occur and to ensure that they do not happen (thereby including, for example, preventive maintenance, management review or other common forms of risk avoidance). Corrective and preventive actions include stages for investigation, action, review, and ...
Automatic corrective action is also called Active Recovery and Self Healing. This technique can be used to increase the MTBF to the length of time an item will be required to be used without maintenance. As an example, failure is expected for space vehicles that can be required to operate correctly for as much as 10 years in a hostile environment.
In some settings, corrective action is used as an encompassing term that includes remedial actions, corrective actions and preventive actions. ‘Remedial Action’ is a term referring to actions taken by businesses to counteract deficiencies or undesirable characteristics in their products.
For example, a system with a service contract guaranteeing a mean time to "repair" of 24 hours, but with additional part lead times, administrative delays, and technician transportation delays adding up to a mean of 6 days, would not be any more attractive than another system with a service contract guaranteeing a mean time to "recovery" of 7 days.
Organizational, or O-level maintenance occurs at the organizational unit level, for example by a single maintenance squadron as part of an aircraft wing. O-level maintenance is typically optimized for quick turn-around, to enhance operational availability.
Any unexpected or undesirable behavior is a symptom. Troubleshooting is the process of isolating the specific cause or causes of the symptom. Frequently the symptom is a failure of the product or process to produce any results. (Nothing was printed, for example). Corrective action can then be taken to prevent further failures of a similar kind.