Corrective maintenance is a

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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.

Definition

A French official standard defines "corrective maintenance" as maintenance which is carried out after failure detection and is aimed at restoring an asset to a condition in which it can perform its intended function (NF EN 13306 X 60-319 standard, June 2010). Corrective maintenance can be subdivided into "immediate corrective maintenance" (in which work starts immediately after a failure) and "deferred corrective maintenance" (in which work is delayed in conformance to a given set of maintenance rules).

Standards

The

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s concerning corrective maintenance are set by IEC 60050 chapter 191 °Dependability and quality of service" The NF EN 13306 X 60-319 is a

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of IEC 60050-191.

Choice

The decision to choose corrective maintenance as a method of maintenance is a decision depending on several factors as the cost of downtime, reliability characteristics and redundancy of assets.

Methods

The steps of corrective maintenance are, following failure, diagnosis – elimination of the part, causing the failure – ordering the replacement – replacement of the part – test of function and finally the continuation of use. The basic form of corrective maintenance is a step-by-step procedure. The object's failure triggers the steps. Modern technologies as the use of

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features reduce the inherent drawbacks of corrective maintenance. by e.g. providing device history, fault patterns, repair advice or availability of spare parts.

Bibliography

* L.C. Morow: ''Maintenance Engineering Hand Book'', Mc Graw Hill, New York, 1952 * S. Nakajima: ''Introduction to TPM'', Productivity Press, Cambridge, Massachusetts, 1988 * Peter Willmott: ''Total Production Maintenance the Western Way'', Butterworth, Heinemann, First Published 1994, Oxford, London

References