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Overall Equipment Effectiveness (OEE) FAQs

How do I know OEE will work for my company?
Overall, equipment effectiveness is common in manufacturing plants making individual parts (discrete plants). However, it is also often used in refineries to help identify actual output.

How do I get an OEE score for my entire production line?
The best way to get an OEE score for your entire production line is to measure OEE at the piece of equipment or specific machine that handles the majority of the work. In non-balanced production lines, measure OEE at the point of constraint.

Should changeover, preventative maintenance, and lunches/breaks affect my OEE score?
Changeovers are part of one of the six big losses (setup and adjustment) and should be included in OEE. Preventive maintenance and lunches/breaks will probably affect your OEE score as well because they take away time that could be used for production. Exceptions to this include preventive maintenance being done during a planned shutdown and if your machinery can produce parts regardless of whether the operator is on break.

Since a world-class OEE score is 85 percent, should this be my target?
No. While 85 percent is an admirable benchmark, most manufacturers who are new to OEE kick out an OEE score of less than 50 percent. You should set OEE goals that will show improvement over time (usually three to five months).

What’s the difference between OEE and TEEP?
Total effective equipment performance (TEEP) measures how much your operation could manufacture if your plant ran 24 hours a day, seven days a week. In contrast, OEE measures your productivity during planned production time.

What period of time is used to calculate OEE?
It’s up to the manufacturer’s discretion, but the most common period of time is one shift. Other time frames include one job, one day, or continuous monitoring.

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