Glossary of Terms
Practical maintenance terms, CMMS language, reliability abbreviations, and plant maintenance definitions in one place.
Browse by letter
399 terms shown
Mean Time to Acknowledge
Mean Time to Acknowledge is the average time between a maintenance alert or request and confirmation that a responsible person has received and accepted it for action.
Mean Time to Detect
Mean Time to Detect is the average time between the start of an equipment problem and the moment it is identified.
Mean Time to Failure
Mean Time to Failure, or MTTF, is the average operating life of non-repairable items before failure.
Mean Time to Repair
Mean Time to Repair, or MTTR, is the average time required to restore a repairable asset after failure.
Mean Time to Restore
Mean Time to Restore is the average time required to return a failed service, system, or asset to an acceptable operating condition.
Measurement Uncertainty
Measurement uncertainty is a quantified expression of the doubt associated with a measurement result.
Mechanical Isolation
Mechanical isolation prevents movement, flow, pressure, or stored mechanical energy from reaching equipment or personnel during work.
Mechanical Looseness
Mechanical looseness is excessive movement caused by inadequate fastening, worn fits, structural weakness, clearance, or poor support.
Mechanical Seal Failure
Mechanical seal failure occurs when a rotating-equipment seal can no longer control leakage between a rotating shaft and stationary housing.
Meter Reading
A meter reading is a recorded measurement of asset usage or operating condition, such as hours, cycles, distance, pressure, temperature, flow, or energy.
Meter-Based Maintenance
Meter-based maintenance is preventive work triggered when an asset reaches a defined usage value such as operating hours, cycles, distance, output, or energy consumption.
Min-Max Inventory
Min-Max inventory is a replenishment method using a minimum trigger level and a maximum target level for each stocked item.
Move Maintenance Records Out of Excel and WhatsApp
MaintBoard helps plant and facility teams manage work orders, preventive maintenance, assets, spare parts, inspections, calibration, and audit-ready maintenance history in one CMMS.