Glossary of Terms
Practical maintenance terms, CMMS language, reliability abbreviations, and plant maintenance definitions in one place.
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399 terms shown
Operational Availability
Operational availability is the proportion of total required time that an asset is ready for use under actual operating and support conditions.
Operational Qualification
Operational Qualification documents that equipment or a system operates as intended throughout specified operating ranges and controls.
Operator Inspection
An operator inspection is a defined equipment check performed by trained production or facility users as part of normal operating responsibility.
Out-of-Tolerance Condition
An out-of-tolerance condition occurs when a measuring instrument's error or performance exceeds the approved acceptance limit.
Overall Equipment Effectiveness
Overall Equipment Effectiveness, or OEE, measures how effectively planned production time is converted into good output by combining availability, performance, and quality.
Overdue Work Percentage
Overdue Work Percentage is the share of due maintenance work that remains incomplete after its required date or approved completion window.
P-F Interval
The P-F interval is the estimated time between the point when a potential failure becomes detectable and the point when functional failure occurs.
Parent Asset
A parent asset is a higher-level asset or system containing one or more child components or maintainable assets.
Parent-Child Work Order
A parent-child work order structure links one main maintenance job to several related sub-jobs, trades, assets, or execution stages.
Pareto Analysis
Pareto analysis ranks problems by their contribution to total loss so teams can focus on the few causes creating the greatest impact.
Parts Issue
A parts issue is the inventory transaction recording that a spare part or material has been supplied from stock to a maintenance job, asset, person, or cost center.
Parts Kitting
Parts kitting is the process of selecting, collecting, verifying, and staging all required materials for a maintenance job before execution.
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