What buyers should verify first
A reliable decision starts with evidence that matches the drawing, production volume and business risk. Use the table below during RFQ review; replace assumptions with named documents, owners and acceptance criteria.
| Review area | What good control looks like | Buyer action |
|---|---|---|
| Business identity | Same legal name through contract, payment and export documents | Mismatch requires explanation |
| Factory evidence | Live shop-floor route tied to the quoted processes | Stock videos are weak evidence |
| Technical depth | Specific answers about datums, workholding and inspection | Generic replies indicate handoff |
| Commercial trail | Invoice and beneficiary fit the disclosed structure | Third-party payment is a red flag |
| Outsourcing | Approved external steps are named and controlled | Hidden outsourcing is unacceptable |
1. Check identity before capability
Request the Chinese legal name, unified social credit code, registered address and business scope. Translate the record independently and confirm the payee. Multiple entities can be legitimate, but their roles must be written into the contract.
For sourcing approval, convert this point into a written requirement: identify the responsible party, evidence to retain, acceptance rule and response when the rule is not met. This keeps a sample success from being mistaken for a capable production system.
2. Run a live process challenge
Choose a distinctive feature from your drawing and ask the contact to walk to the machine, fixture or gauge used for it. Ask questions that require immediate shop-floor knowledge.
For sourcing approval, convert this point into a written requirement: identify the responsible party, evidence to retain, acceptance rule and response when the rule is not met. This keeps a sample success from being mistaken for a capable production system.
3. Inspect document behavior
Real process control appears in revision stamps, travelers, tool lists, lot labels and inspection records. Marketing brochures alone do not show who controls production.
For sourcing approval, convert this point into a written requirement: identify the responsible party, evidence to retain, acceptance rule and response when the rule is not met. This keeps a sample success from being mistaken for a capable production system.
4. Map every external process
Heat treatment, anodizing, plating and special testing may be subcontracted. Record supplier approval, incoming verification, transport protection and responsibility for defects.
For sourcing approval, convert this point into a written requirement: identify the responsible party, evidence to retain, acceptance rule and response when the rule is not met. This keeps a sample success from being mistaken for a capable production system.
5. Protect the pilot order
Use a small, representative order and require material evidence, first-article results and packaging photos before balance payment.
For sourcing approval, convert this point into a written requirement: identify the responsible party, evidence to retain, acceptance rule and response when the rule is not met. This keeps a sample success from being mistaken for a capable production system.
Practical buyer scenario
If a supplier quotes five-axis milling but cannot show the machine, controller, fixture concept or tool-access plan, treat the process as outsourced until verified.
The useful output is a controlled plan, not a promise. Record the drawing revision, assumptions, open questions, required evidence and approval gate in the RFQ or purchase order. For critical applications, obtain engineering, quality and regulatory review appropriate to the product.
RFQ checklist
- Controlled 3D model and 2D drawing with matching revision
- Material grade, condition or temper, and any certificate requirement
- Quantity per release, annual demand and target delivery date
- Critical-to-quality characteristics and agreed measurement method
- Surface finish, cosmetic zones, masking and post-finish dimensions
- Packaging, labeling, Incoterm and destination
- First-article, sampling, traceability and corrective-action expectations
Frequently asked questions
Is factory-direct always cheaper?
Not necessarily. The important question is whether margins, accountability and process ownership are transparent.
Can the bank account belong to another company?
Sometimes an export entity is used, but obtain a written relationship explanation and verify it before payment.
Are video calls reliable?
Live calls are useful when you control the route and ask real-time technical questions.
What is the clearest red flag?
Refusal to identify the manufacturing site or explain who owns quality responsibility.
Sources and further reading
Technical note: Examples in this guide are planning guidance, not a universal manufacturing specification. Final capability, certification, tolerances, treatment and acceptance criteria must be confirmed for the exact drawing and contract.
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