# What Is the DPMO for This Process?

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• #236133

guptaneeraj8888
Participant

Consider a company that provides two services using the same basic process. Service A is relatively complex, and can be defective in 15 different ways. Service B is relatively simple, with only 5 possible defects. The company produces 500 units of A and 1000 units of B. A total of 10 defects are experienced in product A and 17 defects are experienced in product B. What is the DPMO (Defects Per Million Opportunities) for the overall process?

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#236134

Aaron Olson
Participant

I’m assuming this is a homework question so I’ll point you to a place where you can do some learning – I’d take a look at the following definition that can be found on this website:

https://www.isixsigma.com/dictionary/defects-per-million-opportunities-dpmo/

It lays out the formula pretty well.

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#236136

Katie Barry
Keymaster

@guptaneeraj8888 It appears that this is a homework problem.

What do YOU think you should do? Why or why not? The iSixSigma audience is helpful, but they like to see that someone is putting forth a good-faith effort. They aren’t here to do your homework for you.

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#236137

guptaneeraj8888
Participant

I tried but got confused with the defectives. Following is the steps which I have done:
For servivce A:
DPMO:10/(500*15)*1000000= 1333.33

For Service B:
DPMO: 17/(1000*5)*1000000=3400

For overall process: 1333.33+3400=4733.33

Please suggest am I doing it right.
PS: This a practice test question and I got stuck because it answer is
2160.

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#236138

Aaron Olson
Participant

I’d take a look back at the question. It’s asking for the average DPMO for the OVERALL PROCESS. Would you calculate it any differently for the total process?

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#236140

guptaneeraj8888
Participant

Gotcha!!!
For overall process DPMO : 10+17/[(500*15) + (1000*5)] *1000000 = 27/12500 *1000000 = .00216* 1000000 =2160.

Thanks Aaron.
Will asking for further doubt ;-)

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#236150

Michael Cyger
Keymaster

Well done, @guptaneeraj8888. :)

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