OEE
Overall Equipment Effectiveness - the actual output of a tool divided by the potential output of a tool assuming 100% utilization and 100% uptime. A measure of equipment effectiveness developed by SEMATECH. | ||||
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OEE Definition from Encyclopedia Dictionaries & Glossaries
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Overall Equipment Effectiveness
Overall Equipment Effectiveness (OEE) is a measure comparing how well manufacturing equipment is running compared to the ideal plant. The resulting measurement is expressed as the ratio of the actual output of the equipment divided by the maximum possible output of the equipment under ideal conditions. OEE is calculated by multiplying three independently measured values: Availability, Performance Rate, and Quality Rate. In other words, OEE takes an holistic view of all losses that impact on equipment performance: not being available when needed; not running at the ideal rate and not producing first pass A1 quality output. Typical losses include:
Availability
Availability
- Planned downtime
- Set up time
- Unplanned recorded downtime or breakdowns
- Reduced speed
- Minor unrecorded stoppages
- Rejects
- Rework
- Yield and Start up losses
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