Short answer: Evaluate a manufacturer on identity, quality, delivery, price clarity, capacity, communication and compliance, and ask for evidence for each rather than relying on claims. Start with basic existence and background checks, then request records and certificates, test with samples, and score suppliers on the same criteria. Re-check as the relationship develops.
Criteria and evidence
| Criterion | Evidence to ask for | Source |
|---|---|---|
| Identity and legitimacy | Confirmation that the company exists, its address, contact person's position; news or legal items; restricted-party screening result | [1] |
| Quality performance | Documented QC processes, defect, return and inspection records, corrective actions | [2] |
| Certifications and compliance | Certificate PDFs; ask for the document behind any certificate the supplier claims, and check it is current | [3] |
| Delivery reliability and lead time | On-time delivery data, receipt records, advance shipment notices | [2, 3] |
| Price clarity | Quote wording, whether quotes are binding, PO pricing and invoices, price change records | [2, 3] |
| Capacity and responsiveness | Records of order changes and how they were handled; PO acknowledgments and responses to questions | [2] |
| IP protection | Evidence of an NDA process | [3] |
| Red flags | Little online information, no management details, unfinished website, mismatched email domain, P.O. box address | [1] |
Evaluation criteria and the evidence you can ask for
Steps in an evaluation
- Basic background check. Existence, address, contact, restricted-party screening. [1]
- Request evidence. Certificates, QC documents, delivery and defect records. [2, 3]
- Compare quotes. Check wording, binding status and price clarity. [3]
- Test with a sample. Judge quality and responsiveness on a real item (general practice, not drawn from the sources). (general practice)
- Score and decide. Use a weighted scorecard with evidence for each score. [2, 3]
Evaluation checklist
- [ ] Confirm the company exists and verify its address [1]
- [ ] Confirm the contact person's role [1]
- [ ] Screen the company against restricted-party lists for your market [1]
- [ ] Look for news or legal items about the company [1]
- [ ] Check for red flags such as a mismatched email domain [1]
- [ ] Ask for certificates and check they are current [3]
- [ ] Ask for documented QC processes and inspection records [2, 3]
- [ ] Ask for on-time delivery data [2, 3]
- [ ] Compare written, binding quotes [3]
- [ ] Order samples before committing to a full order (general practice)
- [ ] Score suppliers on the same weighted criteria and use evidence, not impressions [3]
- [ ] Agree an NDA where design protection matters [3]
Cautions
- CIPS and ASQ pages could not be fetched, so criteria here come from a trade.gov page and two manufacturing guides.
- Weights in scorecards are examples from one guide; set your own.
- General information, not legal advice.
Related pages on this site
| Page on this site | What it holds |
|---|---|
| How to choose a private label manufacturer: 12 questions to ask, with our answers | Choosing a private label manufacturer |
| Supplier Comparison Scorecard: Seven Questions, Scored | Supplier comparison scorecard |
| How to compare manufacturer quotes | Comparing manufacturer quotes |
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Sources: [1] Commercial Service Tips on Background Checks (U.S. International Trade Administration (trade.gov), fetched 2026-11-12); [2] Supplier Evaluation: Criteria, Process, and Scorecard for Manufacturers (SourceDay, fetched 2026-11-12); [3] Manufacturing Supplier Evaluation Guide (Makerverse, fetched 2026-11-12). As of 2026-11-12. General information, not legal, customs or tax advice. Wording is paraphrased from the pages linked; your written quote and contract govern.