RFQ & Program Launch
Cable Assembly DFM Review Checklist
A cable assembly DFM review should turn drawing and BOM details into buildable, inspectable instructions without taking over the equipment design. Check component identity, termination fit, datums, routing, bend and strain-relief areas, molding, tests, labels, and packaging before sample work begins.
Published: Updated:
Decision summary
What to carry into the decision
- Use one controlled drawing and BOM, then list every open assumption separately.
- Review each transition: wire to terminal, terminal to connector, cable to mold, branch to protection, and assembly to equipment route.
- Give critical features a datum, tolerance, manufacturing method, and inspection method.
- Return decisions to the equipment design authority when they affect function, safety, regulated scope, or finished-equipment acceptance.
In this guide
- 1Prepare the review baseline
- 2DFM review table
- 3Check termination interfaces
- 4Check routing and molded features
- 5Make inspection possible
- 6Close DFM decisions before the sample
Use the sections in sequence, then turn the open items into one controlled build or sourcing package.
Prepare the review baseline
Use the latest drawing, BOM, wiring table, component data, 3D geometry where useful, marked sample photos, test methods, label content, packing notes, quantity phase, and destination. Put the revision on every controlled file.
Create an open-item log for missing dimensions, unresolved components, temporary substitutions, sample-only methods, and decisions retained by the equipment program.
DFM review table
Assign each line a status, owner, evidence need, and due date.
| Components and wire | Complete part numbers, approved sources, wire or cable construction, terminal and seal range, availability assumptions, and documents. |
|---|---|
| Geometry and routing | Datums, lengths, branches, connector orientation, bend areas, exits, keep-outs, tie points, protection, and service movement. |
| Processes | Cut and strip, crimp, solder, routing, molding, assembly, marking, tooling, workholding, and supplier-coordinated items. |
| Verification and release | Inspection method, tests, fixtures, limits, frequency, records, samples, packaging, and change control. |
Check termination interfaces
Confirm that wire size, conductor and insulation dimensions, strip length, terminal, seal, connector cavity, applicator or process data, pull criteria, and visual requirements form a supported combination. Show any soldered joint, splice, PCB connection, or ground termination clearly.
Identify the orientation from the mating side and wire side when cavity numbering could be misread.
Check routing and molded features
Look for concentrated stress, inaccessible inspection points, and geometry that cannot be measured from the current datum scheme.
- Cable exits, first bend, strain relief, branch transitions, tie or clip positions, and rubbing or heat zones.
- Molded envelope, insert position, cable diameter tolerance, shutoff or transition areas, mating clearance, and marking.
- Harness-board or fixture needs for branch routing and connector position.
- Packing bends, coil restraints, caps, and label protection that could change the delivered shape.
Make inspection possible
Every critical dimension or feature needs a practical check. State the datum, tool or fixture, sample condition, method, unit, limit, frequency, and record expectation. Avoid criteria that can be seen only after an irreversible operation unless the control is placed earlier in the process.
For electrical or functional checks, provide the wiring definition, connections, values, sequence, limits, and fixture interface.
Close DFM decisions before the sample
Record accepted proposals in the drawing, BOM, or an authorized deviation. Keep rejected options and sample-only assumptions out of the released build package. A sample should confirm a controlled choice, not become the only place where the choice is visible.