GIFSQ Tools · Module 18 — Manufacturing, Costing & Supply Chain · Tool 345 of 500
Measure how effectively a line really runs: availability × performance × quality — the standard OEE definition used across manufacturing, applied to one shift or one run.
Try sample values — fills the form with the worked example below.
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Availability (%)
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Performance (%)
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Quality (%)
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OEE (%)
Equation: Availability = (planned − downtime) ÷ planned. Performance = (ideal cycle time × units produced) ÷ run time. Quality = good units ÷ units produced. OEE = availability × performance × quality × 100.
Method: Overall equipment effectiveness per the standard definition (SEMI E10 / TPM practice): availability measures lost time, performance measures speed loss against the ideal cycle time, and quality measures the good units. World-class OEE is commonly quoted as 85%.
Assumptions: the ideal cycle time is the fastest sustainable rate for the product, not a target; run time is planned time less downtime; all three factors are measured over the same period.
Limitations: OEE is a diagnostic, not a target to game — cutting planned time or inflating the ideal cycle time makes the number look better while the line runs worse; it does not capture energy, safety or cost.
Rounding: each factor and OEE to 2 decimal places; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Method: Overall equipment effectiveness per the standard definition (SEMI E10 / TPM practice): availability measures lost time, performance measures speed loss against the ideal cycle time, and quality measures the good units. World-class OEE is commonly quoted as 85%.
Assumptions: the ideal cycle time is the fastest sustainable rate for the product, not a target; run time is planned time less downtime; all three factors are measured over the same period.
Limitations: OEE is a diagnostic, not a target to game — cutting planned time or inflating the ideal cycle time makes the number look better while the line runs worse; it does not capture energy, safety or cost.
Rounding: each factor and OEE to 2 decimal places; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Worked example: Planned 480 min, downtime 60 min, ideal cycle 30 s, 700 units, 680 good: availability = 87.50%, performance = 83.33%, quality = 97.14%, OEE = 70.83%.
Enter values above to see results.
World-class OEE is often quoted as 85% (90% availability × 95% performance × 99% quality) — most food lines sit well below it, and the lowest factor is where to start. Tool 345 of 500 — GIFSQ
