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sampling plan based on ANSI/ASQC Z1.4 multi level acceptance

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edited Feb 5, 2021 5:04PM in Quality 1 comment

Summary

How to define a sampling plan based on ANSI/ASQC Z1.4 to allows a mix a critical, major and minor defects

Content

It seems to me that it's a common practice to define rules as follow : 

Exampe Order size: 40,000 pcs of memory sticks, to be made in 1 batch by the supplier.

Single sampling plan.

Normal severity, level II.

AQLs: critical 0, major 1.5%, minor 4.0%

Aka we will accept the lot if for the sample size we have 0 critical, less than 1.5% of major defect and less than 4% of minor defect...

Now the way our solution is defined, we assign an inspection level (and only one) at an inspection plan...so how to achieve requirement previously defined ? 

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