Buyers usually see the quotation and finished part. Inside a factory, the result depends on the decisions made before production: engineering review, process control, inspection, material flow and release discipline.
Quick Answer
Lock the part number, revision, approved files, inspection plan and release date before production. Keep obsolete files visible as historical records but unavailable for new work.
A Factory-Side Failure
A repeat order once arrived with two PDF revisions in the same project folder. The dimensional difference was small, but one hole position changed. The problem was caught during review, before the machine was started. The lesson was simple: file names alone are not a release system.
Start With One Controlled Release
The factory should receive one approved drawing or model package with a clear part number and revision. Email attachments and informal replacements should not silently become the production source.
Link the Revision to the Inspection Plan
When a critical dimension changes, the inspection plan, gauges and first-article report may also need review. Engineering and quality should see the same change.
Separate Old Files From Active Work
Older revisions are useful for traceability, but they should be marked obsolete and removed from active production folders, work instructions and packing records.
Check the Floor, Not Only the Office
Before release, the factory should confirm that operators, inspectors and line leaders are using the current work instruction and sample. This is where a document-control gap becomes a real part-quality risk.
Nbfeiyu Factory View
With dedicated R&D, design, production and quality functions, Nbfeiyu can review the drawing package before the order moves into machining, molding, finishing or assembly.
Buyer Checklist
- Confirm part number and revision on every production file.
- List the approved CAD, PDF, specification and inspection documents.
- Mark obsolete revisions clearly.
- Link changed features to the inspection plan.
- Confirm the shop-floor work instruction before release.
- Keep approval records with the first-article or sample record.
FAQ
Should a buyer send both CAD and PDF files?
Yes, when both are used. The buyer should state which file controls dimensions and which is supporting reference.
When is a new sample needed after a revision?
That depends on the changed feature and risk. A change affecting fit, function, appearance or compliance deserves a documented review.
Can a revision be changed during production?
It can, but the affected work in process, finished stock and shipment status must be identified before the new revision is released.
Conclusion
A drawing revision is only useful when the factory can tell which version engineering, production and quality are actually using. Clear requirements give engineering, production and quality teams a practical basis for action.
Need Help With This OEM Project?
Send the part drawing, revision history and inspection requirements. Nbfeiyu can review the release package before production begins.