Require a controlled, retrievable electronic “cert pack” that is complete at shipment and protected against alteration. Specify acceptable file types (typically searchable PDF for reports plus native data for CMM/CT if needed), unique file naming tied to PO/part/rev/serial or lot, and a table of contents or index. Require authorized signatures (wet or compliant e-signature per your QMS/contract) on the CoC and any reports that your quality system treats as released records. If you accept e-signatures, require evidence of signer identity, date/time, and document version control, and state that superseded versions must be retained and traceable to the final released pack.

Require coupons when part criticality, novel geometry, or limited inspectability makes destructive confirmation necessary, or when mechanical properties are highly orientation- or location-dependent. Define coupons as part of the manufacturing lot (same powder lot, parameter set, build, HIP run, and heat treat load as the parts they represent). Specify coupon type (tensile, density/porosity, microstructure, fatigue if applicable), orientation (build and transverse), and placement (worst-case location in the build volume). State test standards, acceptance criteria, and frequency tied to your lot definition (e.g., per build or per HIP/heat-treat lot). Also state disposition rules: coupons must be uniquely identified, traceable to serial/lot, and retained or submitted per contract.

Require a formal change/deviation request process before implementation. The supplier should notify and obtain written approval for changes that affect the qualified baseline, such as machine model/major rebuild, parameter set revision, powder manufacturer or lot family change, support/orientation strategy changes that impact properties, HIP cycle changes, heat treat furnace/load configuration changes, or sub-tier processor changes for special processes/NDE. Specify the minimum submission content: impacted part numbers/serials or lots, rationale, risk assessment, comparison to baseline, proposed validation (e.g., coupons, NDE scope, FAI re-run), and how traceability will distinguish pre- and post-change product. State that nonconforming or unapproved-changed product must not ship without written disposition.