OEE (Overall Equipment Efficiency) is a Lean Metric comparing the potential machine performance to the actual performance. Depending on the calculation of the machine availability, OEE1 and OEE2 can be distinguished.

Work with OEE to
– Increase capacity of bottleneck process (OEE 1)
– Identify open capacities in order to transfer products (OEE 1)
– Decide which equipment to get rid of (OEE 1)
– Increase efficiency of all equipment (OEE 2)

Calculation:
OEE = Availability × Performance × Quality
        =  (Running Time )/Availability  ×  (Actual Output)/(Planned Output)  ×  (Good parts)/(Total Parts Produced)