KEVOS® WORKOS · Operations
OEE and Downtime Analysis
How effectively is this production asset being used?
Calculates OEE from raw production data and shows where the planned time went, with data checks and downtime cost.
Open the calculatorRuns in your browser. No account needed.
How this tool works
Inputs, units and where to find them
| Input | Unit | Typical source |
|---|---|---|
| Planned production time | min | Planned production time (excluding planned breaks) |
| Downtime | min | Unplanned and changeover stoppages from the downtime log |
| Ideal cycle time | sec/unit | Design or best demonstrated cycle time in seconds |
| Total units produced | units | Units produced (counter) |
| Good units | units | Units right first time (quality records) |
| Estimated downtime cost | $/hr | Cost of one hour of downtime (lost contribution plus idle cost) |
Method and formulas
- Availability = (planned − downtime) ÷ planned
- Performance = ideal cycle × total ÷ run time (capped at 100%)
- Quality = good ÷ total
- OEE = availability × performance × quality = fully productive time ÷ planned time
Limitations
- Performance above 100% indicates an ideal cycle time that is too long or a wrong count
- Rework counts as a quality loss
Typical uses
- Weekly OEE reporting
- Finding the biggest loss on a machine
- Valuing downtime
Who it is for
- Maintenance and production managers
- Continuous-improvement teams
What you get
- OEE and its three factors
- Time-loss table
- Data checks and downtime cost
Interpreting the result
- Attack the largest loss in the time table first
- Fix data faults before acting on the numbers
References
- Nakajima S., Introduction to TPM: Total Productive Maintenance (Productivity Press, 1988)
WORKOS tools are screening and decision-support utilities. Verify important financial, engineering, safety, legal or operational decisions using appropriate professional standards and your organisation’s approved data.
