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During Production Inspection (DUPRO)
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.
Published pricing — no hidden fees
34% issue detection rate
Catches defects before they multiply
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%
Production process observation: equipment, worker technique
Material and component verification vs. bill of materials
First-unit testing: function, appearance, dimensions vs. golden sample
Production timeline and capacity assessment
Corrective action recommendations if issues found
Raw materials and component verification
Dimensional accuracy checks
Assembly and workmanship 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.
Schedule DUPRO
From $268/day — Catch defects before they multiply
Money-back commitment
DELIVERABLES
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
PASSED
232 000
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
Why pay for DUPRO when I'm booking PSI?
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.
When exactly should I schedule DUPRO?
What if nothing is wrong?
TruMark's DUPRO caught a color drift on day 3 that would have ruined 12,000 units.
— Procurement Director, Furniture Brand
United States
Service Bundles
Save when you combine services
Essential
$268
DUPRO
Get Quote
Production Quality
Save 20%
PPI
DUPRO
PSI
CLS
Get Quote
Enterprise
Custom
Factory Audit
Monitoring
PSI
Lab Testing
Get Quote
FAQ
Frequently Asked Questions
DUPRO vs PSI — what's the difference?
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.
How much does DUPRO cost?
Can DUPRO delay my production?
What if my factory says production is at 40% but it's actually 10%?

What's Next?

Combine with PSI for complete production coverage. Add PPI if this is a first order with a new supplier.

Download sample report

View All Services

First-time importer? 

See our starter guide

Product Type*
Order Quantity*
Factory City*

Encrypted. Never shared. Response within 2 business hours.

Inspectors in 38 cities

ISO 17020 methodology

 CNAS-accredited partner labs

Money-back commitment

© 2026 TruMark QC. All rights reserved. Quality You Can Trust. Verified.

ServicesDuring Production Inspection (DUPRO)

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.

Published pricing — no hidden fees 34% issue detection rate Catches defects before they multiply
TruMark inspector performing during-production inspection

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

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.

Schedule DUPRO

From $268/day — Catch defects before they multiply

Money-back commitment

Deliverables

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

PASSED

232 000

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

United States

Service Bundles

Save when you combine services

ESSENTIAL

$268

DUPRO
Get Quote

PRODUCTION QUALITY

Save 20%

PPI
DUPRO
PSI
CLS
Get Quote

ENTERPRISE

Custom

Factory Audit
Monitoring
PSI
Lab Testing
Get Quote

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 report
View All Services

First-time importer?See our starter guide

Product Type*
Order Quantity*
Factory City*

Encrypted. Never shared. Response within 2 business hours.

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Inspectors in 38 citiesISO 17020 methodologyCNAS-accredited partner labsMoney-back commitment