How to calculate OEE (overall equipment effectiveness)
OEE is availability multiplied by performance multiplied by quality. You need planned time, run time, the ideal cycle time, total units and good units.
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The formula
OEE = Availability × Performance × Quality, where Availability = run time ÷ planned time, Performance = (ideal cycle time × total units) ÷ run time, Quality = good units ÷ total units.
Step by step
- Subtract unplanned stops from planned production time to get run time.
- Divide run time by planned time for availability.
- Multiply ideal cycle time by total units and divide by run time for performance.
- Divide good units by total units for quality, then multiply the three.
Worked example
One 480-minute shift
- Availability = 420 ÷ 480 = 87.50%
- Performance = (0.5 × 800) ÷ 420 = 95.24%
- Quality = 760 ÷ 800 = 95.00%
- OEE = 0.875 × 0.9524 × 0.95
OEE is about 79.17%.
Common questions
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Cite this page
Free Calculator. (n.d.). How to calculate OEE (overall equipment effectiveness). https://freecalculator.tech/guides/how-to-calculate-oee
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