ok a subject near and at one time dear to my heart
From my experience as an Adv SQ Mgr (Adv. = from concept to product launch + 30 days), With very few exceptions, suppliers were initially rated, qualified and approved via a 4-6 sheet excel spread sheet, commonly called an SEA or Supplier Eligibility Assessment. This was in many respects a necessary milestone to becoming an approved supplier (automotive). Primarily based upon the results of the SEA, suppliers were reviewed internally and team members voiced their feedback, (this was/is an exhaustive spreadsheet metrics scored from 1-5, everything from packaging, change order process, dunnage/logistics to business recovery plans.)
Once a supplier is approved, responds to RFQ/source package, and they are up and running, with few exceptions all subsequent audits/surveys (all onsite boots on the ground unless non production or low volume) were largely dictated by performance...most often as measured via Internal & External Scorecards. Long winded response but this method was/is vetted and proven. And whether an initial site visit SEA or periodic abbreviated site visit assessment, hard copy "evidence binders" were provided and discussed.
hope this helps...
Optomist1
Once a supplier is approved, responds to RFQ/source package, and they are up and running, with few exceptions all subsequent audits/surveys (all onsite boots on the ground unless non production or low volume) were largely dictated by performance...most often as measured via Internal & External Scorecards. Long winded response but this method was/is vetted and proven. And whether an initial site visit SEA or periodic abbreviated site visit assessment, hard copy "evidence binders" were provided and discussed.
hope this helps...
Optomist1