- I don't think it's possible to determine process capability of an outside supplier by measuring all features on each component of a sample set of a received lot. Only the supplier can perform a capability study after it's been determined that the measurement data is normally distributed and the process has been confirmed as in control. Is this correct? You could theoretically do a 100% inspection of received material for a set period of time. From there you can look at the data to determine your acceptability and reject rate. From there you can begin to look at AQL sampling. FDA recognizes ANSI/ASQ Z1.4-2008 or ISO 2859-1. I know some people like to apply Zero Acceptance Number Sampling Plans C=0 by Nicholas L. Squeglia.
- AQL is a set value from industry standards and chosen by the inspecting group. It is not determined by measurement data taken from multiple features of several parts from a sample set. Is this correct? AQL can be applied in two mentalities. One is by attribute, ANSI/ASQ Z1.4-2008 or ISO 2859-1 , while the other is by variables, ANSI/ASQ Z1.9-2008. I would recommend looking at any of these to see what may best represent your needs.
- AQL has not relationship nor can be translated from Cpk or the reverse. Is this correct? To my understanding that is correct. Cpk is used for process capabilities while AQL provide the number of acceptable defects in a singular lot or batch.
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David Zagorowski (ASQ CQT, CQIA, CQA)
Quality Manager
ROMD LLC
Rochester Hills, MI
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Original Message:
Sent: 02/01/23 02:47 AM
From: ASQ Member
Subject: AQL
@Brian Barber
A commitment of appreciation is all together for the data. I will endeavor to figure it out for extra. Mysainsburys Sign In