How to implement SPC with huge samples?

This topic has 2 replies, 3 voices, and was last updated 17 years, 1 month ago by Issa.

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May 19, 2005 at 2:53 am #39403

Edwards
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I am looking for suggestions on how to implement SPC with the following scenario:
(1) Variable parameter
(2) Hundred of thousands of parts build everyday
(3) Every piece part is being measured, we collect 100% of the data.
Thanks
David

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May 19, 2005 at 3:20 am #119704

Ken Feldman
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What makes you think that you want to implement SPC? What are you trying to learn about the process? Why are you measuring 100% of the parts? Provide a few more specifics about your situation and possibly someone can give you useful feedback.

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May 19, 2005 at 3:44 am #119705

Issa
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If hundreds of thousands of parts are built every day and you perform a 100% testing on every part, what makes you beleive that you are collecting a sample? and why do you call it SPC?
A 100% daily inpection on hundreds of thousands of items is certainly not cost effective and it will not provide a 100% defect free products to your customers. I do not know what you are producing but there must be a better way to do things.
Issa

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