During-Production Inspection (DUPRO) in China: Catch Defects While You Can Still Fix Them
Short answer
A during-production inspection (DUPRO) is an on-site check carried out when part of your order, typically around 20% to 60%, has been produced. Inspectors check finished units against your approved sample, review materials and processes, and flag problems before the whole order is made. It is most valuable for new suppliers, large orders and products with complex assembly.
Key takeaways
- ✓DUPRO happens mid-production, while defects can still be corrected.
- ✓It checks finished units, work in progress and incoming materials.
- ✓It is especially useful with new factories and first orders.
- ✓It complements, but does not replace, the final pre-shipment inspection.
Why inspect during production?
A final inspection protects your money, but if it finds a systemic problem, every unit already has it. Fixing a finished order means delays, rework or difficult negotiations. A DUPRO finds the same problem when only part of the order is made, so the factory can correct the process for the remaining units.
What does a DUPRO check?
- Finished units compared with the golden sample
- Materials and components against your specification
- Production processes and workmanship
- Packaging and labelling in progress
- Production progress against the agreed timeline
Want your product made, inspected and delivered without the risk?
Husbar China Line verifies factories, negotiates for you, arranges on-site inspection before you pay the balance, and manages freight to the UAE, Saudi Arabia and Pakistan.
Request a China Line consultationWhich inspection, when?
| Inspection | When | Main purpose |
|---|---|---|
| Pre-production | Before production starts | Check materials and components |
| During production (DUPRO) | Around 20% to 60% produced | Catch defects while fixable |
| Pre-shipment | When production is complete and mostly packed | Approve before paying the balance |
| Container loading | During loading | Confirm the right goods and quantities ship |
How does China Line handle inspection?
With Husbar China Line, we follow production and arrange independent inspection at the factory, adding a during-production check when the product, supplier or order size calls for it. No balance payment is released until goods pass inspection. Learn more about AQL and quality control inspection or the China Line service.
Frequently asked questions
Is a during-production inspection necessary?+
Not for every order, but it is strongly recommended for new suppliers, first orders, large quantities and complex products.
How is a DUPRO different from a pre-shipment inspection?+
A DUPRO happens mid-production to catch problems early; a pre-shipment inspection happens when production is complete, before the balance is paid.
Who pays for the inspection?+
Usually the buyer pays for independent inspection, so the inspector works for you rather than the factory.
Team Husbar
Husbar Editorial
Team Husbar is the strategy, psychology and research team at Husbar, a psychology-led growth agency headquartered in Dubai. Together we have worked with 100+ brands over 10+ years.
Want your product made, inspected and delivered without the risk?
Husbar China Line verifies factories, negotiates for you, arranges on-site inspection before you pay the balance, and manages freight to the UAE, Saudi Arabia and Pakistan.
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