An average machine in an average factory runs about 35 to 45% OEE. So it is losing 55 to 65% capacity( ) while not running, running at a reduced speed or producing products out of spec. How come than, that the average management reports numbers way over 80%? It is all a matter of definition. What you are not looking for, you will not find. To really reveal the hidden machines in our factories, ALL losses need to be visualized. The OEE Industry Standard aims to give guidelines how to define OEE in order to find ALL potential losses in effectiveness. In this standard you will find a comprehensive overview and guiding principles while defining Availability, Performance and Quality criteria in your OEE.