Preventive Maintenance Frequency
Preventive maintenance frequency is the time, usage, condition, or event interval at which a maintenance task becomes due.
What this term means in maintenance
Preventive maintenance frequency is the time, usage, condition, or event interval at which a maintenance task becomes due.
Common frequency types
PM tasks may be triggered by:
- Calendar time
- Operating hours
- Production cycles
- Distance
- Meter value
- Season
- Condition
- Regulatory date
- Event
Practical example
A filter inspection is monthly, while oil replacement is every 2,000 operating hours. Different failure mechanisms require different triggers.
Selecting the frequency
The interval may consider:
- Failure behavior
- P-F interval
- Asset criticality
- Operating environment
- Usage
- Manufacturer guidance
- History
- Regulation
- Cost and access
Frequency review
The interval should change when evidence shows excessive failures, unnecessary work, changing duty, or stable performance.
Common mistake
Copying one manufacturer's frequency to every similar asset without considering actual load and environment can over-maintain or under-maintain equipment.
How this term differs
Preventive Maintenance Frequency is the time, usage, or event interval that determines when a PM task becomes due. It is related to Preventive Maintenance Task, Preventive Maintenance Compliance, and Preventive Maintenance Software, but these terms describe different records, measures, roles, strategies, or decisions and should not be used interchangeably.
Related concepts
Related maintenance terms
Keep exploring connected CMMS, reliability, and maintenance planning terms.
Preventive Maintenance Task
A preventive maintenance task is a defined inspection, servicing, replacement, measurement, or test performed before functional failure.
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.
Time-Based Maintenance
Time-based maintenance is preventive work performed at fixed calendar intervals such as daily, weekly, monthly, quarterly, or annually.
Glossary FAQs
- How is PM frequency selected?
Use failure behavior, condition, usage, criticality, environment, history, guidance, and regulation.
- Can PM frequency be meter based?
Yes. Operating hours, cycles, distance, and production output can trigger work.
- When should frequency be changed?
When failures, findings, duty, history, or risk show the current interval is unsuitable.