Use the same starting point.
For a new design, identify the requirements revision. For an existing design, also check the design and BOM revision where applicable. Confirm whether you are comparing bare boards or assembled PCBA boards.
Separate one-time design or setup charges from prototype and production prices. A lower total may simply cover a different quantity or a smaller scope.
Ask these questions of each quote.
Keep a copy of each supplier’s answer alongside the quotation. Use “not stated” when something is missing, then ask for clarification.
- Which requirements or design revision is covered?
- What design work, engineering outputs and revisions are included?
- How are source-file handover and design ownership addressed?
- Are design and prototype charges separate from production pricing?
- What quantity is included?
- Are bare boards, components and assembly included?
- Who supplies materials, and how are alternatives approved?
- Are setup, tooling and fixtures included or separate?
- What programming, inspection or functional testing is stated?
- What is the basis for the lead time?
- What freight, tax, import and delivery assumptions are stated?
- How long is the quote valid, and what changes require revision?
An omission needs an answer.
Do not treat an unstated item as included, excluded or free. Ask the supplier to clarify it before comparing totals or confirming the work.
Make sure any proposed component alternatives and changes to inspection coverage are visible. Keep the explanation with the quote so later discussions use the same assumptions.
Connect the quote to the build goal.
For a prototype, describe what you need to learn from the build and agree how that objective relates to the proposed work and checks. Track design and scope changes when requesting a revised quotation.
This checklist is a comparison aid, not a price estimate or contract. Final responsibilities and commercial terms belong in the project agreement.