Product audit sampling plans

Jim Wynne

Leader
Admin
A product audit should be a process whereby a particular process is chosen and you follow the process, guided by the control plan, to ensure that the product meets the requirements at each step. It's not a thing where you pull a bunch of products and inspect them.
 

Enghabashy

Quite Involved in Discussions
how do we define sampling plan for product audit, should we follow some kind of standard like ANSI/ASQ Z1.4-2008 ??

All relevant sample plans should be referenced in control plans because they are parts of QC & management system , the sample plan could be defined in relevant product standard & regularity requirements; therefore it should be followed as mandatory requirement if stated in relevant standards or any CSR , anyhow ISO 2859 lot by lot sampling plan could be more applicable for variables , attributes as guidance STD.
 
M

malasuerte

A product audit should be a process whereby a particular process is chosen and you follow the process, guided by the control plan, to ensure that the product meets the requirements at each step. It's not a thing where you pull a bunch of products and inspect them.

Sorry, I disagree. A Product Audit is precisely the "pulling of a bunch of products and inspecting them". That is the definition of a Product Audit!

Per VDA 6.5, you plan your Product audit to occur at certain stages of the process. You determine the requirements to be evaluated. You go to the "stage" you have defined; you randomly sample products against the requirement and then you record the assessment.
 
M

malasuerte

thank you a lot for your prompt answer.
so on which bases i define the sample size and rejection limits

It is Random Sampling, you should plan this out ahead of time.

Not sure what you mean by "rejection limits" - but, that is not the intent. You are evaluating the product against the requirements. Your product audit report will then capture the required points (number of parts sampled, # found to be nonconforming, classification of nonconformities, quantitative result, etc)
 

Jim Wynne

Leader
Admin
Sorry, I disagree. A Product Audit is precisely the "pulling of a bunch of products and inspecting them". That is the definition of a Product Audit!

Per VDA 6.5, you plan your Product audit to occur at certain stages of the process. You determine the requirements to be evaluated. You go to the "stage" you have defined; you randomly sample products against the requirement and then you record the assessment.
Where was VDA 6.5 mentioned as relevant?
 
M

malasuerte

Where was VDA 6.5 mentioned as relevant?

This is IATF is it not? If this is a discussion about IATF, then VDA 6.5 is relevant because is both the document that provides the guideline for Product Audits and it is the methodology expected by some of the automakers and their suppliers. In my particular case we have now had over a dozen audits using VDA in the last 4 years.

Sure an organization can make up its own process, but that simply makes no sense. "We have the best recipe in the world for xxx, but let's just make up our own." I prefer to follow a good document that is pretty easy to follow, makes life easy, and makes customers happy.
 

Jim Wynne

Leader
Admin
This is IATF is it not? If this is a discussion about IATF, then VDA 6.5 is relevant because is both the document that provides the guideline for Product Audits and it is the methodology expected by some of the automakers and their suppliers. In my particular case we have now had over a dozen audits using VDA in the last 4 years.

Sure an organization can make up its own process, but that simply makes no sense. "We have the best recipe in the world for xxx, but let's just make up our own." I prefer to follow a good document that is pretty easy to follow, makes life easy, and makes customers happy.
So you're saying that in IATF 16949, VDA 6.5 is a normative reference?
 
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