Time-Based Maintenance
Time-based maintenance is preventive work performed at fixed calendar intervals such as daily, weekly, monthly, quarterly, or annually.
What this term means in maintenance
Time-based maintenance is preventive work performed at fixed calendar intervals such as daily, weekly, monthly, quarterly, or annually.
How time-based maintenance works
The maintenance task becomes due according to elapsed calendar time rather than actual operating usage or measured condition.
Examples include:
- Weekly safety inspection
- Monthly filter check
- Quarterly lubrication
- Six-monthly service
- Annual statutory inspection
When it is suitable
Time-based maintenance is useful when:
- Equipment usage is relatively stable
- Deterioration is related to time
- Regulation or manufacturer guidance defines an interval
- The task is simple and low cost
- Condition monitoring is not practical
Practical example
An emergency generator receives a monthly inspection and an annual service even when operating hours remain low because readiness, fuel condition, batteries, and safety devices must still be checked.
Limitations
Calendar intervals may cause over-maintenance when usage is low or under-maintenance when usage is unusually high.
Common mistake
Applying the same calendar frequency to all assets without considering environment, duty, failure history, and risk creates unnecessary work or missed deterioration.
Related concepts
Related maintenance terms
Keep exploring connected CMMS, reliability, and maintenance planning terms.
Preventive Maintenance
Preventive maintenance is planned work performed at defined time, usage, or meter intervals to reduce the likelihood of equipment failure or deterioration.
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.
Preventive Maintenance Compliance
Preventive maintenance compliance is the percentage of scheduled preventive maintenance tasks completed within the organization’s defined on-time window.
Glossary FAQs
- What is an example of time-based maintenance?
Examples include weekly inspections, monthly lubrication, quarterly servicing, and annual statutory checks.
- When is time-based maintenance appropriate?
It is useful when deterioration relates to time, usage is stable, or regulation and manufacturer guidance define a calendar interval.
- What is the limitation of time-based maintenance?
It can over-maintain lightly used assets and under-maintain assets exposed to unusually high usage or harsh conditions.