1. Start with the drawing and application
Give each supplier the same information: drawing revision, 3D model, material grade, quantity, functional tolerances, finish, inspection scope and destination. If the application has regulatory or traceability requirements, identify them before quotation.
2. Ask for process-specific evidence
A machine list is useful but incomplete. Ask how the supplier would fixture the part, control critical datums, manage thin walls or deep features and verify the dimensions that matter. A credible response should distinguish standard tolerances from special features that need additional control.
3. Review inspection before production
Agree which dimensions will be reported, the measurement equipment, sampling frequency, report format and acceptance criteria. Material certificates, finish certificates or other records should be defined as part of the quotation rather than requested after production.
4. Verify the company and quality system
Check the legal company name, manufacturing address, certification scope and whether the quoted work is performed in-house or coordinated with a partner. Request current certification documents directly during supplier qualification.
5. Compare quotation scope—not only price
Confirm whether material, tooling, fixtures, surface treatment, inspection reports, packaging, freight and taxes are included. Differences in scope can create a misleading price comparison.
6. Test communication quality
A supplier should identify missing or conflicting information and record technical assumptions. For international projects, clear responsibility between sales coordination and the manufacturing team helps prevent requirements from being lost.
Questions to ask before placing an order
- Which features drive manufacturing risk or cost?
- Which tolerances require special process control?
- What inspection evidence will be delivered?
- How will drawing revisions be controlled?
- Who owns technical and commercial communication?
- How are nonconforming parts documented and resolved?
METIC and Hongye structure
METIC coordinates international enquiries, quotations, export documents and customer communication. Hongye is the manufacturing base for CNC parts and injection molds. Requirements are reviewed against the actual drawing before capability, lead time and inspection scope are confirmed.