Supplier flowdown verification of tests and revisions

g_dep1

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#1
Hello,

I work at a defense contractor, and one of the issues we are finding is that our ATP (Acceptance Test Procedure) criteria is different from our vendors ATP. This has been on-going for 15+ years. An ATP will pass the supplier site, but fail when we run the same test at our facility.

I'm new to the company/industry and with my automotive background, introduced the implementation of APQP tools to assist. Essentially asked for the creation of detailed Control Plans at each facility for each ATP. For example I asked the vendor to document their ATP using the Control Plan format with the focus on specification tolerances and criteria. We will then do a table-top review at our site to ensure it matches.

Do you all think this can be sufficient? Furthermore, I believe that these ATP gaps occurred due to changes in ATP criteria which was never communicated. Does anyone have and checklists or guidelines for supplier revision control on test criteria and documentation? The company I'm at does not utilize PPAP.

Appreciate any feedback/thoughts/suggestions. Especially any documents/checklists which could help for prevention now and moving forward.

Many Thanks!
 
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