Calculation of Cable Assembly DPPM

V

vimalvg

#1
Hi,
My company is manufacturing cable assemblies for Aerospace, Medical and Automotive fields. Customer will inform complaints through emails and telephone. Based on the complaints we will issue RMA letter. Generally it takes a long time i.e 1 to 2 months to recieve the rejected parts. We calculate DPPM of the plant beginning of every month.While calulating the DPPM whether we need to consider this reported defects. Pls help
 
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Stijloor

Staff member
Super Moderator
#2
Hi,
My company is manufacturing cable assemblies for Aerospace, Medical and Automotive fields. Customer will inform complaints through emails and telephone. Based on the complaints we will issue RMA letter. Generally it takes a long time i.e 1 to 2 months to recieve the rejected parts. We calculate DPPM of the plant beginning of every month.While calulating the DPPM whether we need to consider this reported defects. Pls help
Can someone help?

Thanks!

Stijloor.
 

Jim Wynne

Staff member
Admin
#3
Hi,
My company is manufacturing cable assemblies for Aerospace, Medical and Automotive fields. Customer will inform complaints through emails and telephone. Based on the complaints we will issue RMA letter. Generally it takes a long time i.e 1 to 2 months to recieve the rejected parts. We calculate DPPM of the plant beginning of every month.While calulating the DPPM whether we need to consider this reported defects. Pls help
Whether you count returns in the month they're reported or the month they're received is shouldn't be important so long as you do it one way or the other consistently. I would probably opt for counting them when received.
 
V

vimalvg

#4
Hi,
If I counted the defect without recieving the parts this defect will be highlighted in DPPM and it will be reflected in all presentations such as MRM, QBR etc. .But after the reciept of defective parts upon analyzing if the defect is NCPR(Customer process rejections) then the we need to remove the defect from that particular month. What is the standard practise for calculation of DPPM?.


Thanks,
Vimal
 

Jim Wynne

Staff member
Admin
#5
Hi,
If I counted the defect without recieving the parts this defect will be highlighted in DPPM and it will be reflected in all presentations such as MRM, QBR etc. .But after the reciept of defective parts upon analyzing if the defect is NCPR(Customer process rejections) then the we need to remove the defect from that particular month. What is the standard practise for calculation of DPPM?.

Thanks,
Vimal
I'm not sure what you're asking. Defective units should not be counted as defective until you're sure they are defective. On the other hand, it might be helpful to know how often customers are sending things back that aren't actually defective. You need to figure out what you want to keep track of and establish categories, and do your PPM calculations within each category.
 

sowmya

Involved - Posts
#6
Hi,

For consideration of DPPM, you can count as you receive the parts. But for analyzing the root cause of the defect, you can initiate as soon as the defect is reported. this can be done, if you have the pictures or details of defect. This will help you to fix the problem earlier.

Sowmya
 

somashekar

Staff member
Super Moderator
#7
Hi,
If I counted the defect without recieving the parts this defect will be highlighted in DPPM and it will be reflected in all presentations such as MRM, QBR etc. .But after the reciept of defective parts upon analyzing if the defect is NCPR(Customer process rejections) then the we need to remove the defect from that particular month. What is the standard practise for calculation of DPPM?.


Thanks,
Vimal
Keep it simple and do not mix matters even though they are the same products.
Your shop DPPM values reflect your production performance while the customer rejections if analyzed to be a process defect, will be an input to further modify your process and monitoring and measurment method, which will in turn alter your production performance and the DPPM values going further.
 
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