Require objective evidence that the supplier’s AM parameter set and downstream HIP/heat treatment route are qualified for the specific material, machine, and build envelope. Typical evidence includes: a documented process qualification plan, build coupons/witness specimens tied to the same build as parts, mechanical test results (tensile, fatigue if required, hardness), density/porosity verification method, microstructure review where applicable, and a controlled correlation between machine parameter set IDs and test reports. Ensure the qualification explicitly covers post-HIP and post-machining condition if those states define final properties.

Ask for a capacity profile tied to your route: AM machine availability by platform, HIP vessel/furnace capacity (including cycle times and batching constraints), CNC spindle hours, and inspection/NDE throughput. Require documented lead times for each operation, a load vs. capacity snapshot (even if redacted), and their escalation plan for equipment downtime (qualified backup machines, approved sub-tiers, or spare-part strategy). Align on firm gates (e.g., build start, HIP run, machining start, FAI completion) and require timely notification thresholds for slips.

Define, in writing, which changes are ‘notify’ versus ‘customer approval required’ and what triggers partial or full requalification. Common approval-required changes include: machine model or serial change, parameter set/scan strategy change, layer thickness change, material specification or powder supplier change, powder reuse limits change, build orientation/support strategy changes that affect key characteristics, HIP cycle changes, and inspection method/acceptance criteria changes. Also define required documentation for each change (revisioned work instruction, updated risk assessment, and evidence package) and how changes are linked to serial/lot records.