OEE (Overall Equipment Effectiveness) is a useful measure, but it only becomes valuable when you use it to prioritise. Trying to improve everything at once often ends with nothing improving for good. This article reviews a prioritised approach.
OEE is three losses in one number
OEE consists of availability, performance and quality. A single OEE number tells you there is a loss — but not where. Only when you break the number down into the three components does it become clear where the effort gives the most.
The three components
- •Availability — losses from breakdowns, changeovers and start-up
- •Performance — losses from reduced speed and micro-stops
- •Quality — losses from scrap and rework
Start with the biggest loss
A systematic approach begins by identifying the component that drags the most, and the specific cause behind it. That gives a focused effort with a measurable impact — rather than scattered initiatives that each move things a little.
Early results build momentum
When the first improvement shows a visible change in the numbers, trust in the method is built. It is often that trust, not the method itself, that decides whether the improvement work continues when everyday pressure mounts.
To calculate your own potential, you can use our OEE calculator and OEE dashboard template together with the full OEE guide. If a large part of the loss is in changeovers, read on about SMED and reduced changeover time.
✓Concrete takeaways
- →Break OEE down into availability, performance and quality before you act
- →Choose one loss point at a time — start with the biggest
- →Tie each effort to a measurable change in OEE
- →Use early results to sustain engagement
Sources and further reading
- Nakajima, S. (1988). Introduction to TPM: Total Productive Maintenance. Productivity Press.
- OEE.com — definition and calculation of OEE (reference work).
The references show the professional basis. Sources are reproduced in their original language.