An OEE score of 100% is perfect production: manufacturing only good parts, as fast as possible, with no stop time.
An OEE score of 85% is considered world class for discrete manufacturers. For many companies, it is a suitable long-term goal.
An OEE score of 60% is fairly typical for discrete manufacturers, but indicates there is substantial room for improvement.
An OEE score of 40% is not at all uncommon for manufacturing companies that are just starting to track and improve their manufacturing performance. It is a low score and in most cases can be easily improved through straightforward measures (e.g. by tracking stop time reasons and addressing the largest sources of downtime – one at a time).