A supplier’s product photos cannot show whether it can manage a repeatable OEM program. Buyers should audit the workflow from specification review to final shipment and verify evidence at each stage.

Engineering and sampling

Check whether the factory can convert drawings into material lists, cutting files, pressure specifications and inspection criteria. Sample changes should be documented with version numbers and approval records.

Capacity and quality systems

Review production lines, trained operators, peak-season planning, incoming material checks, in-process inspection and final random inspection. Capacity claims should be supported by recent production records.

Documents to request

  • Business and relevant management certificates.
  • Sample schedule, production plan and quality control plan.
  • Traceable inspection reports and corrective-action records.

Choose the factory that gives clear evidence and consistent communication, not simply the lowest unit price.