Overall Equipment Effectiveness combines availability, performance, and quality. It can organize loss data, but it is not the single best measure for every production decision.
Read the Three Factors Separately Before Multiplying Them
Run time compared with the time your facility defines as available.
Actual output compared with a validated expectation for the work being run.
Good output compared with total output under the defined process.
Definitions Travel With the Number
Planned stops, product mix, speed standards, minor stops, rework, startup loss, and inspection rules all affect interpretation. Record the rules beside the result so a change in definition is not mistaken for a change in performance.
The Same OEE Can Hide Different Problems
One machine can lose time to availability while another loses output to speed or quality. Their combined values may match even though the needed responses are entirely different.
Use OEE Only When It Answers the Production Question
Review component trends and event categories before selecting a countermeasure. For some decisions, completed orders, schedule adherence, queue time, changeover duration, yield, or another direct measure will be more useful than a broad benchmark percentage.