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Zero Defect Sampling Plan Standards
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Zero Defect Sampling Plan Standards
Zero Defect Sampling Plan Standards
Zero Defect Sampling Plan Standards
Zero Defect Sampling Plan Standards
Zero Defect Sampling Plan Standards
Zero Defect Sampling Plan Standards
Zero Defect Sampling Plan Standards
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Zero Defect Sampling Plan Standards


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ansi z1.4 - inspection by attributes, samples and sampling plans, sampling plans for attribute data, zero acceptance sampling plan, zero defects
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  Post Number #1  
Old 16th April 2018, 10:55 AM
marcusja2002

 
 
Total Posts: 41
Question Zero Defect Sampling Plan Standards

I've combed the internet and the cove and can't seem to locate the answer I'm looking for.

I looked through all of ANSI 1.4 and couldnt find a sampling plan for zero defects.

Most of the charts allow for some parts to be found as failures but still accept the lot. The problem is if I just say only accept on zero is the sample size would be larger than necessary.

Is there a standard out there for a zero defect inspection chart?

Thanks in advance.

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  Post Number #2  
Old 16th April 2018, 12:14 PM
Mark Meer

 
 
Total Posts: 749
Re: Zero Defect Sampling Plan Standards

Not sure what you mean by "a sampling plan for zero defects". Do you mean that you want to be confident that there are zero defects in a given lot?

The only way to do this is by 100% sampling.

You say that an accept on zero (even with a low-risk verification level?) is still too large a sample size?

How do you expect to arrive at a high degree of confidence that there are "zero defects" without large - or 100% - sampling?

Last edited by Mark Meer; 16th April 2018 at 12:19 PM.
  Post Number #3  
Old 16th April 2018, 02:02 PM
Mike S.

 
 
Total Posts: 2,212
Re: Zero Defect Sampling Plan Standards

I think you are asking about what is known as C=0 sampling plans. There are threads on here about this. Also look up ASQ H1331 or Nicholas Squeglia's Zero Acceptance Number Sampling Plans.
  Post Number #4  
Old 16th April 2018, 04:14 PM
ScottK's Avatar
ScottK

 
 
Total Posts: 2,658
Re: Zero Defect Sampling Plan Standards

I use Squeglia's "Zero Acceptance Number Sampling Plans - Fifth Edition" you can get it from ASQ
  Post Number #5  
Old 16th April 2018, 05:11 PM
Al Rosen's Avatar
Al Rosen

 
 
Total Posts: 3,598
Re: Zero Defect Sampling Plan Standards

Look at mil-std-1916.
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