Calculating Combined DPMO and Sigma Level for Two or More Different Work Areas

[Blake Slayton]

Hello All,

Did I quick search but didn't find this topic posted (at least by thread title anyway).

I have two different work areas that make different products which have different quantities of "Total Number of Opportunities per Unit." Obviously I can calculate the DPMO and Sigma level for each individually, but how do I calculate them both as a whole (entire company), other than simply averaging the two results?

Thanks!


Blake

 

[Bev D]

It's a simple average of the averages problems.

Sum the defects from both plants and divide that number by the sum of the opportunities.

Don't just average the averages...

 

[Blake Slayton]

It's a simple average of the averages problems.

Sum the defects from both plants and divide that number by the sum of the opportunities.

Don't just average the averages...

Thanks, Bev! I will give that a try.

Another thing I thought I could do was simply add the two DPMO values and get the Sigma Level from that. Would that work as well?


Blake

 

[Bev D]

Another thing I thought I could do was simply add the two DPMO values and get the Sigma Level from that. Would that work as well?

Well remember dpmo is a ratio so simply adding the dpmo numbers is not mathematically correct.