Technical fit
Confirm the supplier actually uses a suitable process for the material, geometry, tolerance and production volume. Marketing claims are not a substitute for process evidence.
Quality evidence
Check the scope—not just the logo—of certifications. Clarify inspection equipment, traceability, control plans and any industry-specific requirements.
Capacity and timing
Separate sample timing, first production timing and repeat lead time. Ask how capacity is calculated and which operations are outsourced.
Commercial fit
Clarify MOQ, tooling ownership, setup charges, packaging, payment terms and the assumptions behind the quoted price.
Open checks
A good qualification report does not pretend uncertainty has disappeared. It makes unresolved points visible so they can be validated before nomination.