Zero Defect Sampling Plan Standards

[marcusja2002]

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.

 

[Mark Meer]

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?

 

[Mike S.]

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.

 

[ScottK]

I use Squeglia's "Zero Acceptance Number Sampling Plans - Fifth Edition" you can get it from ASQ

 

[Al Rosen]

Look at mil-std-1916.