PCB assembly turns a bare board and a defined set of components into an assembled circuit board. A useful quotation starts with the exact build configuration: what is populated, who supplies each material, which inspections are included, and what must be demonstrated before shipment.
Define the work and deliverable
Decide whether the deliverable is an assembled board, a programmed board, or a functionally tested assembly. These are different scopes. A soldered unit may still need firmware, calibration, cables or a fixture before it can demonstrate the intended product behavior. Identify those dependencies before treating two prices as comparable.
Files and requirements to send
- A released BOM with manufacturer, complete manufacturer part number, quantity and reference designators.
- Fabrication data, a placement file with units and origin, and an assembly drawing showing polarity and no-fit locations.
- The build quantity, product revision, variant rules, material ownership and required inspection or test records.
Decisions to close before release
| Decision | What to confirm |
|---|---|
| Configuration | Reconcile BOM references, placements and the drawing. Record every intentional no-fit location. |
| Materials | Identify customer-supplied stock, approved alternatives, shortages and any material that needs special handling. |
| Acceptance | Define the inspection scope and electrical checks separately. Agree which records identify the shipped build. |
A practical planning example
For a pilot with two population variants, send a variant-specific BOM or a clear population matrix. A note such as “same as the last board except the sensor” leaves purchasing, placement and test teams to interpret the change. Release a single revision package and identify which units belong to each variant.
Does PCB assembly include functional testing?
Only when it is explicitly included in the agreed scope. Specify the test procedure, fixture, firmware, limits, test data and responsibility for failed units. Visual inspection alone does not establish that the complete product operates correctly.
Compare the complete proposal
Ask for the included work, exclusions, setup charges, material responsibilities and schedule dependencies in writing. Use the quote comparison checklist to keep the same configuration and acceptance scope across offers.
Confirm project fit
[NEEDS CLIENT INPUT]: verified manufacturing site, relevant process limits, available equipment, certificates, MOQ and committed lead times for this service. The requirements above are a project-planning guide; availability must be confirmed against your actual files.
Related work in your build
Prepare the RFQ checklist, review quality and project fit, or browse all services.