Glossary of Terms
Practical maintenance terms, CMMS language, reliability abbreviations, and plant maintenance definitions in one place.
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399 terms shown
Control Valve Maintenance
Control valve maintenance preserves the ability of a valve, actuator, and positioner to regulate process flow, pressure, level, or temperature accurately.
Corrective Action
Corrective action is an action taken to remove or control the cause of an existing problem or nonconformity and prevent recurrence.
Corrective and Preventive Action
Corrective and Preventive Action, or CAPA, is a controlled process for correcting a problem, removing its causes, and preventing recurrence or similar future problems.
Corrective Maintenance
Corrective maintenance is work performed to restore an asset after a defect, abnormal condition, or failure has been identified.
Corrosion Rate
Corrosion rate is the estimated loss of material thickness over a defined period caused by corrosion.
Corrosion Under Insulation
Corrosion Under Insulation is external corrosion that develops beneath thermal insulation and may remain hidden until significant damage occurs.
Cost per Work Order
Cost per Work Order is the average or actual maintenance cost associated with completing individual work orders.
Critical Asset
A critical asset is equipment whose failure could create an unacceptable impact on safety, environment, product quality, compliance, production, or business continuity.
Critical Spare
A critical spare is a replacement part whose unavailability could cause unacceptable equipment downtime, safety exposure, quality risk, or business interruption.
Criticality Matrix
A criticality matrix is a structured grid used to classify assets or failure modes according to failure likelihood and consequence.
Cycle Count Variance
Cycle count variance is the difference between the physical quantity counted and the quantity recorded in the inventory system.
Dead Stock
Dead stock is inventory with no expected future use because of obsolescence, equipment removal, duplication, damage, or excessive quantity.
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