³Ô¹Ïtv / TESTING AND PROTECTIONPrinted-board standards form a defined procurement chainGeneric + sectionalRevision and classProduct requirementsIdentify construction andsectional specificationAgree controlled revision, classand exceptionsResolve drawing and purchase-noteconflictsRetain product-specificverification evidenceExplanatory schematic / not an inspection record or released drawing