Define the mechanical interfaces
Provide controlled enclosure drawings, fastener details, mounting points, cable routes and critical dimensions. Identify cosmetic surfaces and handling requirements. Clarify whether the manufacturer supplies fabricated metalwork or molded parts, receives them from you or procures them from a nominated source.
Connect wiring to the product definition
A harness needs a pin-to-pin definition, connector orientation, wire specification and length or routing requirements. Document shields, grounding points and strain relief. A correct PCB can still become a defective finished product when a cable, connector or grounding detail is ambiguous.
Control firmware and configuration
Specify who owns programming images, version release, checksums and device configuration. Product variants may share hardware but need different firmware or labels. Keep credentials and sensitive provisioning material out of uncontrolled files, and agree a separate secure process when required.
Test at the assembled-product level
After integration, verify the functions affected by the enclosure, wiring, power supply and configuration. Define how serial numbers are recorded, which accessories are included and how the product is packaged. Establish whether the output is a ready-to-install unit or an intermediate assembly.
At a glance
| INTERFACE | REQUIRED INPUT | RELEASE CHECK |
|---|---|---|
| Mechanical | Assembly drawing and hardware BOM | Fit, fastening and critical dimensions |
| Wiring | Harness drawing and routing notes | Connections, continuity and strain relief |
| Firmware | Approved image and configuration | Version and programming verification |
| Finished product | System test and packaging specification | Acceptance record and complete kit |
A practical checklist
- Define the exact finished-product deliverable.
- Include mechanical and cable documentation.
- Identify programming and provisioning ownership.
- Specify product-level acceptance criteria.
- Define labels, accessories and packaging.
- Assign responsibility for interface changes.
Assign an owner to each open item and keep the decision with the project revision. A checked box should point to a document, approval or piece of evidence; it should not simply indicate that a topic was discussed.
A common mistake to avoid
Quoting only the PCB assembly while treating everything else as incidental. Enclosures, harnesses, fixtures, configuration and final verification can materially change both the cost and the project schedule.
Put the guidance to work
Start with the RFQ preparation checklist, keep component information in the BOM template, and compare evidence using the supplier scorecard. Confirm project-specific requirements with your design team and manufacturing partner.
Explore the related manufacturing scope or return to the Box Build & Cable guide hub.