Mean Time Between Maintenance
Mean Time Between Maintenance is the average operating time between maintenance events, including corrective and selected preventive interventions.
What this term means in maintenance
Mean Time Between Maintenance is the average operating time between maintenance events, including corrective and selected preventive interventions.
Basic formula
MTBM = Total operating time ÷ Number of maintenance events
Practical example
An asset operates for 2,400 hours and receives eight included maintenance interventions.
MTBM = 300 hours
Definition control
The organization must define which maintenance events are included.
MTBM versus MTBF
MTBF counts failures.
MTBM may include preventive, corrective, and other maintenance events.
Use
It can help assess maintenance demand and supportability.
Common mistake
Comparing MTBM values when one site includes inspections and another includes only repairs produces misleading results.
Related concepts
Related maintenance terms
Keep exploring connected CMMS, reliability, and maintenance planning terms.
Mean Time Between Failures
Mean Time Between Failures, or MTBF, is the average operating time between failures of a repairable asset during a defined period.
Preventive Maintenance
Preventive maintenance is planned work performed at defined time, usage, or meter intervals to reduce the likelihood of equipment failure or deterioration.
Maintenance Key Performance Indicator
A maintenance key performance indicator, or KPI, is a defined measure used to monitor whether maintenance processes and outcomes support business objectives.
Glossary FAQs
- What does MTBM stand for?
MTBM stands for Mean Time Between Maintenance.
- How is MTBM different from MTBF?
MTBF counts failures, while MTBM may include preventive and corrective interventions.
- Why must event definitions be clear?
Different included activities can materially change the result.