OEE (Overall Equipment Effectiveness) indicator. OEE allows you to assess the effectiveness of the use of machinery in enterprises, i.e. shows how many percent of the work the machines have done from what they were able to complete at a given time. OEE is the basic measure in the TPM system that helps maintain maximum efficiency of devices in enterprises.
The OEE indicator consists of three parameters: Accessibility, Performance and Quality.
Availability is a parameter that takes into account all events that cause production to stop, e.g. failures or changes. Availability is calculated as the difference between change time and downtime divided by change time.
Performance is the second parameter included in the OEE indicator. It is calculated as the quotient of finished production and target production. Performance includes short production interruptions or slow commissioning.
The third element affecting the value of the OEE indicator is quality. Quality is calculated as the difference between finished production and shortcomings divided by completed production. This parameter takes into account faulty products (which do not meet quality standards) and lower performance when starting machines.
We calculate the OEE indicator from the above mentioned parameters according to the following formula:
OEE = Availability * Performance * Quality * 100%
According to the world standard adopted for OEE, parameters should strive for values:
- Availability 90%
- Performance 95%
- Quality 99%
- OEE 85%