A factory audit should prove who controls each order step for the exact cling film configuration with current records. A tour and presentation cannot show whether material identity, conversion, inspection, packing and release remain traceable when something changes or fails.
Trace one finished roll backward
| Step | Record to sample | Question |
|---|---|---|
| Order/specification | Customer and internal revision | Did production use the approved version? |
| Material | Incoming lot and release status | Which lots entered this roll? |
| Conversion | Traveler/settings/output | Who recorded and checked the run? |
| Inspection | Raw readings and instrument ID | Can the pass be reproduced? |
| Packing/release | Box/carton version, count, status | Who released it for shipment? |
Then trace one problem forward
Select a real nonconformance, change or complaint. Check containment, affected lots, decision authority, buyer notification, correction and effectiveness. For outsourced steps, inspect the purchase specification and incoming verification instead of accepting “approved subcontractor.”
Keep regulatory evidence product-specific
The FDA explains that some food-contact authorisations are manufacturer- and use-specific; see its current regulatory-status guidance. Use the general supplier checklist for remote screening. Do not infer YIYUAN equipment, capacity or certification from this article; those require separate evidence.
