Glossary

Overall Equipment Effectiveness or Efficiency (OEE) is usually interpreted as Overall Equipment Effectiveness. It measures the percentage of manufacturing time during which a manufacturing asset is truly productive. To score 100%, this means no down time, no parts made which do not conform to specification, and a production rate which is the full potential of the asset.

OEE is also expanded to Overall Equipment Efficiency – specialists will say this is Overall Equipment Effectiveness achieved with minimum resources, but in many environments the two versions are used interchangeably.

Overall Equipment Effectiveness (OFE is OEE) but applied to a whole production plant or factory, comparing theoretical output with actual output. To calculate OFE, an intermediate metric Overall Throughput Effectiveness (OTE) is needed to handle the many possible permutations of material flow through a factory.