RFQ & Program Launch
Drawing Revision and Engineering Change Control
A cable assembly change is controlled only when the new requirement, affected documents and inventory, implementation point, validation, authorization, and communication are recorded together. Match drawing, BOM, wiring table, tooling, test, labels, and packaging before releasing the revision.
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Decision summary
What to carry into the decision
- Give the drawing, BOM, wiring table, and related instructions compatible revision status.
- Assess material, tooling, process, test, record, label, packing, and delivery effects before choosing the effective point.
- Separate temporary deviation, running change, and full revision change.
- Record the disposition of open orders, work in process, finished stock, and supplier commitments.
In this guide
- 1Describe the change precisely
- 2Engineering change impact table
- 3Control material and inventory disposition
- 4Choose validation from the affected function
- 5Set and communicate the effective point
- 6Common change‑control failures
Use the sections in sequence, then turn the open items into one controlled build or sourcing package.
Describe the change precisely
Identify the current and proposed document revisions, part and configuration affected, exact old and new requirement, reason, and originator. Mark the change in the drawing or a controlled comparison so purchasing and production do not interpret a narrative alone.
If a connector or material changes, include the full original and proposed manufacturer part numbers and the release decision for the new source.
Engineering change impact table
Close each affected area or state why it does not change.
| Product and components | Dimensions, pinout, function, materials, connector system, approved sources, labels, and target-market records. |
|---|---|
| Manufacturing | Purchasing, incoming checks, cut and strip, crimp or solder, routing, molding, assembly, tools, fixtures, and instructions. |
| Verification | Inspection features, gauges, test method and program, limits, sample or first article, records, and equipment fit. |
| Commercial and delivery | Material commitments, tooling cost, unit effect, open orders, schedule scenario, packaging, shipping documents, and destination. |
Control material and inventory disposition
Record on-hand material, open purchase orders, work in process, finished assemblies, packed goods, and any material held by qualified suppliers. Decide whether each is use-as-is, reworked, returned, segregated, consumed under a running change, or otherwise dispositioned by the responsible program.
Keep the decision tied to part number, revision, quantity, lot or other identifier so old and new configurations cannot be mixed silently.
Choose validation from the affected function
Do not repeat every test automatically; select evidence from the actual change.
- Dimensional or fit check for geometry, routing, connector, mold, fixture, or packaging changes.
- Crimp, pull, solder, seating, seal, continuity, polarity, electrical, mechanical, or functional method when the relevant interface changes.
- Material and component document check for an exact new part or construction.
- Sample, first article, or controlled production quantity with records and disposition before full release.
Set and communicate the effective point
Name the order, lot, date, serial or quantity boundary and how remaining old configuration will be identified. Update purchasing, production, inspection, test, labels, packaging, inventory, and shipment preparation before the effective point arrives.
Confirm that external suppliers or service providers receive the same controlled change where their part or process is affected.
Common change-control failures
Typical failures include updating the drawing but not the BOM, approving a component without its terminal or tool effect, releasing the change before stock disposition, and using an email as the only effective-point record.
Another risk is combining an urgent temporary deviation with a permanent improvement. Record them separately so each has a clear quantity, evidence, authorization, and closure.