Production

OEE Calculator

Calculate Overall Equipment Effectiveness (OEE) from availability, performance, and quality rates. Essential KPI for dairy plant production managers.

OEE Calculator

Calculate Overall Equipment Effectiveness (OEE) from availability, performance, and quality rates.

%
Actual run time / Planned production time × 100
%
Actual output / Maximum possible output × 100
%
Good parts / Total parts produced × 100
Formula
(availability * performance * quality) / 10000
availability Availability Rate (%)
performance Performance Rate (%)
quality Quality Rate (%)
Worked Example
1
Given:
availability = 90
performance = 95
quality = 99
2
Apply the formula:
(availability * performance * quality) / 10000
3
Result:84.645 %

What is OEE?

OEE (Overall Equipment Effectiveness) is the gold standard KPI for measuring manufacturing productivity. It represents the percentage of planned production time that is truly productive.

OEE (%) = Availability × Performance × Quality

The Three Components

Availability Rate

Measures equipment uptime vs. planned production time.

  • Formula: (Planned Time − Downtime) ÷ Planned Time × 100
  • Target: > 90%

Performance Rate

Measures actual output vs. theoretical maximum output.

  • Formula: Actual Output ÷ Maximum Possible Output × 100
  • Target: > 95%

Quality Rate

Measures good products vs. total products produced.

  • Formula: Good Parts ÷ Total Parts × 100
  • Target: > 99%

OEE Benchmarks

OEE ScorePerformance Level
100%Perfect
85%+World Class
60–84%Good
40–59%Needs Improvement
< 40%Poor

World-class OEE for dairy plants is typically 75–85%.

Six Big Losses

OEE helps identify and eliminate the Six Big Losses:

  1. Equipment Failure (Availability)
  2. Setup and Adjustments (Availability)
  3. Idling and Minor Stoppages (Performance)
  4. Reduced Speed (Performance)
  5. Process Defects (Quality)
  6. Reduced Yield (Quality)
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