Define the project
Turnkey assembly can combine bare-board fabrication, component procurement and assembly in one project. The commercial scope still needs to be explicit: which parts are included, which are supplied by you, which tests are required and which one-time costs apply.
Requirements to include
- Approved BOM with manufacturer part numbers
- Fabrication package and placement data
- Approved alternates and substitution rules
- Quantity by fitted variant
- Testing, programming, packaging and delivery requirements
Decisions to resolve before release
Request visibility into shortages and substitutions before they affect the build. Components should not be changed solely because a footprint appears compatible. Establish who approves alternatives and how electrical, mechanical and firmware compatibility will be checked.
Request a project-specific quote
Send the design revision, quantity and required date with the technical requirements above. Identify anything still under review. Feasibility, process details, inspection scope and delivery are confirmed against the actual files; a general service description is not a production approval.
Define what turnkey includes
Turnkey can combine bare-board procurement, component sourcing, assembly and agreed test or integration work, but the included scope must be written down. Design services, compliance testing, firmware development and enclosure work are not automatically included because the order is called turnkey.
For partial turnkey, assign responsibility by BOM line and identify who resolves shortages, packaging problems and incorrect supplied material. The build schedule depends on a complete, approved kit and released files, not simply the date of the initial inquiry.
Control procurement and excess material
Agree approved manufacturers, sourcing channels, substitution permissions and traceability needs. Specify how minimum purchase quantities, reels, attrition and unused inventory are handled. A part available in a larger purchasing quantity may create excess material that needs a clear owner and disposition.
Ask the quotation to identify nonrecurring work, tooling, programming, testing and any sourcing assumptions. Confirm the first-article approval gate and how changes after procurement affect cost or timing. A repeat turnkey build should use the approved BOM and documented alternatives, with lifecycle issues reviewed before purchasing.