Planned-to-Unplanned Work Ratio
The Planned-to-Unplanned Work Ratio compares planned maintenance effort with work that begins without sufficient preparation.
What this term means in maintenance
The Planned-to-Unplanned Work Ratio compares planned maintenance effort with work that begins without sufficient preparation.
Basic calculation
Planned-to-Unplanned Ratio = Planned maintenance hours ÷ Unplanned maintenance hours
Practical example
A team records 300 planned hours and 100 unplanned hours.
Ratio = 3:1
What the ratio indicates
A higher planned share may indicate better preparation and reliability, but the definition must remain consistent.
Hours versus job count
Labor hours are usually more meaningful because jobs vary in size.
Use with other metrics
Review the ratio with emergency work, downtime, PM compliance, and backlog.
Common mistake
Classifying every PM work order as planned without checking job readiness inflates the result.
Related concepts
Related maintenance terms
Keep exploring connected CMMS, reliability, and maintenance planning terms.
Planned Maintenance Percentage
Planned maintenance percentage is the share of total maintenance labor hours spent on work that was prepared before execution.
Unplanned Maintenance
Unplanned maintenance is work that begins without sufficient preparation of scope, labor, parts, tools, access, or execution method.
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 is the planned-to-unplanned work ratio?
Planned maintenance hours divided by unplanned maintenance hours.
- Why use labor hours?
Jobs vary greatly in size, so counts can mislead.
- Can all PM be considered planned?
Only when the work is sufficiently prepared before execution.