1. Start with manufacturing fit
Share a representative build package and ask the supplier to identify the highest-risk features. A useful answer references your package mix, panel, materials, sourcing constraints and test access—not only a generic equipment list.
2. Inspect the quotation assumptions
A comparable quotation separates PCB fabrication, material, assembly, test, tooling, programming, packaging and logistics. It should state the revision quoted, exchange-rate or material-validity limits and the handling of excess inventory.
3. Test sourcing discipline
Ask how exact manufacturer part numbers are validated, who can approve alternates, how shortages are escalated and what traceability is available. Silent substitution is a supplier-control failure.
4. Define quality evidence
Confirm workmanship criteria, first-article approval, inspection coverage, functional-test ownership, nonconformance handling and record retention. A certificate alone does not define your product acceptance plan.
5. Run a low-risk first order
Use a representative pilot build with dated review points, clear success criteria and a post-build review. Evaluate communication quality, exception handling and documentation as seriously as delivered boards.
Supplier comparison: ask for a specific answer
| Criterion | Question for each supplier | Evidence to compare |
|---|---|---|
| Manufacturing fit | What in this design requires special review? | File-specific questions with proposed resolution |
| Quote completeness | Which costs and tasks are excluded? | Same-revision cost breakdown and assumptions |
| Sourcing | Who approves an alternate or new purchase source? | Written approval path and traceability scope |
| Testing | Which failure modes can escape this plan? | Coverage matrix and explicit limits |
| Change control | How does a revision reach purchasing and production? | Named approver, effective batch and obsolete-stock disposition |
| First order | What must pass before a repeat order? | Pilot acceptance criteria and issue-closure record |
Compare total accepted-board cost
Ask for material, PCB fabrication, assembly, setup, tooling, programming, testing, packaging and delivery as separate lines. Record excess inventory and the cost of agreed rework. Compare quotes only after checking that the revision and acceptance scope match.
Use this guide in your next build review
Share the current revision, pilot result, expected batch size and unresolved risks. We will identify the information needed before quotation or production release.
Prepare an RFQ