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Preventive maintenance ( PM) is:
[t]he practice of periodically performing maintenance activities on a system or equipment with the intended purpose of preventing unscheduled outages of the equipment due to component failure.
[a]ll actions performed in an attempt to retain an item in a specified condition by providing systematic inspection, detection, and prevention of incipient failures.
Department of the Army, Supervisory Control and Data Acquisition (SCADA) Systems for Command, Control, Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities, at B-4 (Jan. 21, 2006) ( full-text).
Defense Acquisition University, Glossary, at B-136 (13th ed. Nov. 2009) ( full-text). ↑ NATO Standardization Agency, NATO Glossary of Terms and Definitions 2-P-8 (2008) (