## OEE of average machine between 35 and 45%?

Q: You mention within your site the OEE of an average machine is between 35 and 45%. What data is this figure based upon?

## List with expected world class OEE’s

Q: Is there a list that summarizes the expected world class OEE% by industry?
Example: Casting you won’t expect anything better than 70% or manual assembly not better than 90%?

## How high should the OEE be?

Q: I have been reading in different sources about the OEE measurement and I have not been able to find any concrete agreement about what the value for OEE should be. Could you please give me any references?

I have read that there is no common agreement but that it is generally suggested that bellow 65% should be considered unacceptable, since it represents a very low competitiveness and a great number of economic losses. A value between 65 and 75% is considered as regular, only acceptable if it is being improved. A value between 75 and 85 % means an acceptable level with slight economic losses and which can be easily improved to World Class levels. A value between 85 and 95 percent is considered as good and equals World Class values; it represents a high level of competitiveness. And finally, a value above 95% is considered as excellence; an excellent competitiveness and World Class values.

## Calculate a monthly OEE

Q: My boss wants me to calculate and present a graphical OEE representation on a monthly basis. I present this as I do with the daily data. I calculate the monthly OEE  by taking the average of the daily OEE’s.

Is it alright to present a monthly OEE of the machines by calculating the average of the daily OEE’s in a month?

## Evaluating performance of machines

Q: I have been asked by my boss to evaluate the performance of the Machines in our factory and I found the implementation of OEE is the best way. Now I have some questions about how to define OEE, I have been following this website which helps me a lot.

Q: I am a bit confused about Loading Time, Shift time, Potential production time.  How do they relate? Or are they all the same?

## Can 85% OEE be NOT world Class?

Q: Usually, 85% OEE is considered to be ‘World Class’. You say it isn’t. How come?

## Comparing OEE’s

Q: Our management is looking for one universal tool for OEE calculation so they can compare the performance of equipment. How do you feel about this?