Technical resource
Turnkey, consigned and mixed PCB assembly sourcing
Choose the model by assigning responsibility for each BOM line, not only by choosing a label. Material ownership, shortages and alternatives affect both the quotation and the build.
Practical checklist
Agree the inputs, responsibilities and acceptance
| Topic | Prepare or define | Check before release |
|---|---|---|
| Turnkey | Manufacturer sources the agreed BOM | Approve manufacturer parts, alternates and commercial assumptions |
| Consigned | Customer supplies components for assembly | Agree delivery, quantities, packaging and incoming checks |
| Mixed sourcing | Responsibilities differ by BOM line | Identify the owner and approval route for each item |
| Shortages | A missing item can stop the build | Define excess, attrition, replacements and shortage reporting |
| Alternatives | A substitute can affect fit, function or approvals | Require documented approval before use |
| Residual stock | Unused material remains after the order | Agree ownership, storage and return arrangements |
Worked example
Turn the checklist into an engineering decision
Example: if the customer consigns a programmed MCU, specify the firmware version, identification and incoming verification. Sourcing ownership alone does not define programming responsibility.
Action log
Close the gaps before production
- List the missing file or unresolved decision
- Assign a customer or supplier owner
- Record the proposed action and approval needed
- Identify the affected revision and target build
- Carry open items into the pilot release decision
Sources and use
A practical guide for project preparation
Editorial guidance from Keep Best EMS, organized around the manufacturing and engineering workflow described in the company profile. The worked example is illustrative, not a customer performance claim. Updated 27 September 2026.
Use this checklist with your product drawings, component data and agreed acceptance requirements. The final manufacturing and test plan is specific to the released product.
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