Measure of how well a manufacturing operation is utilized
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Overall equipment effectiveness[1] (OEE) is a measure of how well a manufacturing operation is utilized (facilities, time and material) compared to its full potential, during the periods when it is scheduled to run. It identifies the percentage of manufacturing time that is truly productive. An OEE of 100% means that only good parts are produced (100% quality), at the maximum speed (100% performance), and without interruption (100% availability).
Measuring OEE is a manufacturing best practice. By measuring OEE and the underlying losses, important insights can be gained on how to systematically improve the manufacturing process. OEE is an effective metric for identifying losses, bench-marking progress, and improving the productivity of manufacturing equipment (i.e., eliminating waste). The best way for reliable OEE monitoring is to automatically collect all data directly from the machines.
Total effective equipment performance(TEEP) is a closely related measure which quantifies OEE against calendar hours rather than only against scheduled operating hours. A TEEP of 100% means that the operations have run with an OEE of 100% 24 hours a day and 365 days a year (100% loading).
The term OEE was coined by Seiichi Nakajima.[2] It is based on the Harrington Emerson way of thinking regarding labor efficiency.[citation needed] The generic form of OEE allows comparison between manufacturing units in differing industries. It is not however an absolute measure and is best used to identify scope for process performance improvement, and how to get the improvement.[3]
OEE measurement is also commonly used as a key performance indicator (KPI) in conjunction with lean manufacturing efforts to provide an indicator of success. OEE can be illustrated by a brief discussion of the six metrics that comprise the system (the "Six Big Losses").
^Guimarães, Nilo (16 August 2019). "OEE, TEEP e IROG! Importantes Métricas Para a Indústria". CONAENGE-Congresso Online de Eng. Mecânica e Automação (in Brazilian Portuguese). Retrieved 30 May 2021.
^"Origin of OEE". OEE Foundation. Retrieved 15 July 2015.
^"Understanding OEE". Archived from the original on 23 September 2016. Retrieved 7 July 2015.
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