OEE (Overall Equipment Effectiveness) Calculator
Calculate Overall Equipment Effectiveness from availability, performance, and quality metrics for manufacturing and production line analysis.
Results
What is it?
OEE (Overall Equipment Effectiveness) is the gold standard metric for manufacturing productivity. It combines three factors: Availability (was the machine running?), Performance (was it running at full speed?), and Quality (were the parts good?). A world-class OEE is 85%.
How to use
Enter your planned production time for the shift, record unplanned downtime, specify the ideal (designed) cycle time per part, count total parts produced and the number of good (first-pass quality) parts. OEE = Availability � Performance � Quality.
Example scenario
An 8-hour shift (480 min) with 45 min downtime: Availability = 90.6%. Running at 800 parts vs theoretical max of 870 (30s cycle): Performance = 92.0%. With 760 good parts out of 800: Quality = 95%. OEE = 90.6% � 92.0% � 95% = 79.2%.
Pro tip
The three OEE losses map to six big losses in lean manufacturing: Availability = Breakdowns + Changeovers; Performance = Minor Stoppages + Reduced Speed; Quality = Scrap + Startup Rejects. Attack the biggest loss category first. Performance losses are often the most overlooked � slow running is easy to miss but compounds rapidly.