Maintenance KPI summary
Enter a period's work order, hours, downtime and cost figures; the tool calculates common maintenance indicators and compares them with your own targets. Fields you leave empty leave that indicator blank; no industry benchmarks are given.
Work orders
Operation and downtime
Cost
Your targets (optional)
Target values come from your organisation's policy; the tool does not suggest any. A target you leave empty is not compared.
The calculation runs in your browser; the values you enter are not sent anywhere.
Indicators
Planned maintenance share (hours)
78.8 %
planned hours / (planned + unplanned hours)
Planned work order share (count)
87 %
planned work orders / (planned + unplanned work orders)
PM compliance
90 %
planned work orders completed on time / planned work orders
Overdue work order rate
10.1 %
overdue work orders / total work orders
MTTR (mean time to repair)
4.2 hours
failure downtime hours / number of failures
MTBF (mean time between failures)
58.2 hours
operating time / number of failures
Availability
93.3 %
operating time / (operating time + failure downtime)
Maintenance cost / asset value (period)
3.8 %
maintenance cost / asset value
Maintenance cost / asset value (annual)
45.6 %
period ratio × 365 / period days
This tool gives no industry or class benchmarks and suggests no targets; a good value depends on equipment type, mode of operation and definitions. Set targets from your own history and policy.
Definitions and assumptions
- Indicator definitions vary between organisations (for example "on time", "overdue", "downtime"). The formulas written here are used; prepare the inputs according to your own definitions.
- MTBF and availability are calculated from one period and from totals; if you enter the total of several machines the result is a group average, not per machine.
- Availability here counts only failure downtime; planned stops and non-production time should be treated separately from operating time.
- MTTR and MTBF calculated from a few failures are statistically volatile; do not read a single period as a trend.
share = planned / (planned + unplanned) · compliance = planned on time / planned · MTTR = downtime hours / failures · MTBF = operating hours / failures · availability = operating / (operating + downtime)
The result is a summary derived from the figures you enter; with different definitions the values will differ. It contains no benchmark or target values; verify data quality and definitions before deciding.
Let's read your maintenance indicators together with failure and monitoring data and find where more planned intervention can pay off.
Request a conversation01
How to use it
A
Enter a period's work order, labour hours, downtime, operating time, failure and cost figures; indicators for fields you leave empty are not calculated.
B
Read the planned/unplanned share, PM compliance, MTTR, MTBF, availability and cost ratio from the table.
C
Optionally enter your own targets to see the gap; copy the result.
02
Which indicators, and why?
The planned maintenance share shows how much of the maintenance team's time goes to pre-planned work and how much to breakdowns. PM compliance shows whether planned jobs are done on time, and the overdue rate shows the backlog.
MTTR summarises how many hours a failure lasts on average, MTBF how many hours the equipment runs between failures, and availability how much of the time the equipment is ready. The maintenance cost to asset value ratio scales spending to the size of the asset base.
03
Care when reading indicators
A single indicator on its own can mislead: a high planned share with low compliance means the plans are not being carried out; high availability with rising cost may mean the equipment gets more maintenance than it needs. Follow indicators together and over time.
The quality of the numbers depends on work order closing discipline. If failure durations and causes are recorded incompletely, MTTR and MTBF lose their meaning. The tool's output is only a summary of the data you enter.
04
How does predictive maintenance affect these indicators?
Vibration, temperature or current monitoring that shows a failure in advance turns unplanned jobs into planned ones: unplanned labour hours fall while the planned share and availability rise and MTTR shortens. To see the effect, compare periods before and after monitoring with the same definitions.
This tool makes no estimate of the effect; entering two separate periods with the same definitions is enough to measure it.
FAQ
- What should a good PM compliance rate be?
- This tool gives no benchmark. An acceptable rate depends on equipment criticality and organisational policy. Set a reference from your own history, enter your target here and follow the gap.
- For MTBF, should I use operating time or calendar time?
- In this tool MTBF = operating time / number of failures; enter the time the equipment actually ran. If your organisation uses calendar time you can enter that value and calculate the same way, but keep the same definition for comparisons.
- What happens if the number of failures is zero?
- MTTR and MTBF are undefined and shown as not computed. This means there were no failures in the period; MTBF could be called infinite but no numerical value can be given.
- How is the overdue work order rate calculated?
- The number of open work orders past due at the end of the period is divided by the total (planned + unplanned) work orders in the period. If your organisation also counts work orders carried over from earlier periods, prepare the inputs accordingly.
- Can I enter several machines together?
- Yes, but the result is an average over the total, not per machine. For a per-machine comparison, enter each machine separately.
Strengthen your indicators with monitoring data
Let's look at which of your unplanned stops gave advance warning and what that does to your indicators.