Sample plans new approach
Gary Vale
2 Posts

Hello,
We are looking for a statistical SME source or links to resources to help us develop a process for our incoming material inspection. Currently we are us a AQL sampling plan and would like to look at

a new more efficient method (if available) of changing the inspections levels up or down based on history or even waiving if justified.
Thanks
Gary
3 Replies
Trish Borzon
867 Posts
Hi Gary Vale‍ - you might want to look in the Statistics Division community https://my.asq.org/communities/home/177 . and their resources https://my.asq.org/communities/reviews/item/177/12/473
And the Inspection Division - https://my.asq.org/communities/home/158

Also tagging a few people from the divisions to possibly help answer your question - Mindy Hotchkiss‍ , Gary Gehring‍ , Steven Schuelka,‍ James Spichiger‍ , Ben Tomic
hope this helps!
Trish

Gary Vale
2 Posts
Hi Trish, Thank you for the direction I have a look in those locations.

Best
Gary
Hi Gary,
With regards to sampling inspection, I am most familiar with the attribute sampling standard ANSI/ASQ-Z1.4. This standard provides instruction on how to change "inspection levels" based on past performance. You can try double sampling plans using this same; these will reduce your inspection costs though they will impact your risk.
Another option is to use ANSI/ASQ-Z1.9, a sampling plan used for variables. While this standard is more complex than the attribute standard, it might lower your inspection costs due to smaller sample sizes.
Good luck
Jim Spichiger