Overall Equipment Effectiveness

OEE measures how much of planned production time a machine spends making good parts at full speed. It multiplies three ratios: availability, performance and quality. A score of 1.0 means only good parts, as fast as possible, with no stops.

Source checked4/4 values · 2026-10-25Metric

Specification

1 source

Kind	metric

Formula

OEE = A * P * Q

Symbol	Name	Max
A	Availability	1
P	Performance	1
Q	Quality	1

Worked example: A = 0.9, P = 0.95, Q = 0.98 → 0.8379

Study notes

Availability = run time / planned production time.
Performance = (ideal cycle time x total count) / run time.
Quality = good count / total count.
The three factors multiply, so three 90% scores give an OEE of about 73%.