What is Overall equipment effectiveness (OEE)?
The overall equipment effectiveness (OEE) of production machinery is an advanced measurement method, with which you can determine how effectively the production machinery or production line is able to carry out its tasks. OEE calculation is based on three factors: availability, speed, and quality. OEE is a tool that helps focus the improvements in the right places and ensure that they are as effective as possible. The key to improvement is to remove factors that limit production. 
Why is OEE measured?
It is important to have reliable data on your production. Operators, supervisors, development personnel, and managers need valid, up-to-date information. Measuring your OEE affects the operators and your company, but also your customer relationships: your delivery reliability improves, capacity increases, costs decrease and become more manageable, and the the effectiveness of labor increases.
Who can affect the OEE?
OEE is a production key figure, and at best your entire personnel can be committed to measure and improve it. The operators naturally play a key role, but service personnel are also very important in ensuring the availability of production machinery, and management and process planners can tackle structural problems in your production. OEE is a common indicator that shows you the right way to continuous improvement and minimizes part optimization.