During Production Inspection (DUPRO)
The sample was perfect. You don't know what the run looks like. We inspect at 20-40% built, while a systematic defect is a rework, not a shipment.

3,400+
Completed
24h
Deployment
$8,400
Avg saved
66%
Pass Rate
Understanding the Service
What Is During Production Inspection?
You approved a sample, released a PO, and the next thing you see is a finished container. DUPRO closes that gap. Our inspector attends at 20-40% completion, examines the finished units, watches the line, and checks materials against your bill of materials. A defect found here is fixed on the units still to come; at 100% the same defect is a rework of the whole order.
We once told a client to skip DUPRO and save the day rate. The PSI then found a threading fault running through all 8,000 garments. Rework took six weeks and $42,000. We do not give that advice now.
James Liu
Founder & CEO
Our Protocol
What Our Inspector Checks
Every checkpoint verified on every inspection.
Early defect detection on completed units at 20-40%
Corrective action recommendations if issues found
Production process observation: equipment, worker technique
Raw materials and component verification
Material and component verification vs. bill of materials
Dimensional accuracy checks
First-unit testing: function, appearance, dimensions vs. golden sample
Assembly and workmanship assessment
Production timeline and capacity assessment
Production output rate tracking
Use Cases
When You Need This Service
First orders with new suppliers
High-value orders (rework > $10,000)
Complex multi-component products
Tight delivery deadlines
Continuous production runs with quality drift risk
Process
How It Works
From booking to report in 5 simple steps.
01
Book at 20-40% Completion
Factory confirms production progress. Book 48 hours ahead for optimal timing.
02
Inspector Verifies Progress
Confirms actual production percentage and checks factory-reported status.
03
Completed Units Sampled
Finished units tested against your specs and golden sample.
04
Production Line Observed
Equipment, worker technique, QC procedures assessed for systematic issues.
05
Report with Corrective Actions
Delivered within 24 hours with specific fix recommendations.
From $268/day — Catch defects before they multiply
Money-back commitmentDeliverables
What You Receive
DUPRO inspection report with corrective actions
Verified completion percentage
Defect analysis with root cause identification
Production timeline forecast
Photo documentation
Material verification results
Inspection Report
PASSED232 000
PASS
132
FAIL
156
PENDING
Key findings
Dimensional variance — 2 units exceeded ±0.3 mm tolerance on housing width. Classified as Major per ISO 2859-1.
Surface finish — minor scuff on 1 unit, within AQL limits. Classified as Minor per ISO 2859-1.
Common Concerns
Honest Answers to Tough Questions
PSI finds a defect after every unit is made. DUPRO finds it at 20-40% built, when only the units already produced need rework — at the same published $268 man-day rate.
Book DUPRO once production reaches 20-40% completion — early enough to correct a systematic defect before it multiplies, late enough that finished units exist to inspect. We recommend confirming the factory's actual progress and scheduling about 48 hours ahead so the inspector arrives at the ideal moment.
Then you have documented proof the run is on track — verified completion percentage, a photo record of the units built so far, and a read on whether your ship date is still realistic.
TruMark's DUPRO caught a color drift on day 3 that would have ruined 12,000 units.
— Procurement Director, Furniture Brand
FAQ
Frequently Asked Questions
DUPRO happens at 20-40% production to catch and fix defects early. PSI happens at 80-100% to make the final accept/reject decision. They serve different purposes — DUPRO prevents, PSI confirms.
DUPRO starts at $268/day with published, no-hidden-fee pricing — the same day rate as our other on-site inspections. Most single-line orders are covered in one day; larger or multi-line factories may need additional days, which we quote up front before you book.
No. The inspection runs alongside your line without stopping it — our inspector observes and samples completed units while production continues. You get the report within 24 hours, so any corrective action can start immediately rather than after the full run is finished.
That mismatch is exactly what DUPRO is designed to expose. Our inspector verifies the true completion percentage on-site, and if the factory has misreported progress we document it in the report so you can hold them accountable and reschedule the inspection for the correct stage at no wasted cost.
What's Next?
Combine with PSI for complete production coverage. Add PPI if this is a first order with a new supplier.
Download sample reportFirst-time importer?See our starter guide
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