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Re: parts per million

From: Al Azur
Date: 8/21/2004
Time: 11:25:36 PM

Comments

CP, hope your visted company is still in business.

You wrote: "I am currently working in the screw manufacturing field and have been recieving orders requiring 100 parts per million or less. The process itself is not capable of producing this so we use a sorting service to get us to that level. We've been using C=0 sampling plan w/ AQL=.01. My question is will our current plan allow us to audit the sorting results and meet our customer requirements of 100ppm? If not what would you suggest?"

First thing I would suggest is: Have you met with your customer, described your process capability (assuming you've actually quantified it), and what the costs are to provide conforming product at various quality levels given that you need to contract out for sorting services.

AQL=0.01% means that your customer is prepared to accept product much less than 100 ppm (maybe even 200 or 300 ppm) nonconforming.

The situation you describe needs immediate attention.


Last changed: November 20, 2007