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ISO/IEC 17020 Certified Since 2016
During Product Inspection (DPI) — Product Inspection in China
Catch quality defects before they become costly problems. Our DPI service verifies your products mid-production—when 30-50% of goods are finished—so you can correct issues early and keep your shipment on schedule.
48h
Inspector Deployment to Any Asian Factory
24h
Detailed PDF Report After Inspection
19+
Years of Quality Assurance Since 2006
20+
Countries Covered Across Asia
What Is During Product Inspection (DPI)?
During Product Inspection—also referred to as DUPRO (During Production Inspection)—is a quality control checkpoint performed at the critical mid-production stage. It takes place when 30% to 50% of your goods are finished and packed into export cartons, giving you a window to identify and correct quality problems before mass production is complete.
Quality problems often emerge during mass production—even after a perfect pre-production sample. DPI is your early warning system: it verifies that the factory's production line is delivering consistent quality that matches your approval sample and specifications, helping you avoid costly shipment delays.
Unlike a final inspection that happens after everything is produced, DPI gives you the power to course-correct while there's still time. If issues are found, the factory can fix the remaining 50-70% of production before it's too late.
Why DPI Is Critical for Your Supply Chain
Skipping mid-production inspection is one of the most expensive mistakes an importer can make. Here's why smart buyers include DPI in every quality control plan.
Catch Defects Early
Identify quality issues when only 30-50% of goods are produced. The factory still has time to fix problems in the remaining production batch before shipping deadlines.
Prevent Shipment Delays
When defects are found at final inspection, the entire shipment gets delayed. DPI catches issues early so corrections happen during production, keeping your timeline intact.
Reduce Rework Costs
Fixing 1,000 defective units found at the 30% mark costs dramatically less than reworking 10,000 units discovered after full production is complete. Early detection saves money.
Verify Production Consistency
Ensure the factory's mass production quality matches your approval sample. Production line variations in people, materials, and environment can cause drift—DPI catches this drift.
Protect Brand Reputation
Every defective product that reaches your customer damages your brand. DPI acts as a safety net, preventing quality failures from reaching store shelves and end consumers.
Real-Time Production Visibility
Receive a detailed inspection report within 24 hours showing exactly what's happening on your production line. Make informed decisions with data, not guesswork.
DPI vs IPI vs FRI: Which Inspection Do You Need?
UTS offers three core product inspection services at different production stages. Here's how they compare.
| Dimension | IPI (Initial Production Inspection) | DPI (During Product Inspection) | FRI (Final Random Inspection) |
|---|---|---|---|
| Core Objective | Source gatekeeping — ensure production starts right | Mid-course correction — catch problems early | Shipment confirmation — verify final quality |
| Production Stage | 5% – 10% of goods produced | 30% – 50% of goods produced & packed | 100% production complete, 80% packed |
| Sampling Standard | Flexible, reference to approval sample | Based on AQL standards or client requirements | Strict ANSI/ASQ Z1.4 (ISO 2859-1) compliance |
| Key Value | Identify early production deviations | Correct issues while production continues | Final confirmation of full batch quality |
| Best For | New products, complex designs, new suppliers | High-value orders, long production runs, tight deadlines | All orders as standard final checkpoint |
| Risk Mitigation | Prevents wrong-start from going too far | Prevents problems from growing into full-batch failures | Prevents defective goods from leaving the factory |
When Should You Choose DPI?
Not every order requires mid-production inspection. Here are the scenarios where DPI delivers the highest return on investment.
1
High-Value Orders
When your order value exceeds $50,000, the cost of a failed final inspection is significant. DPI at the 30% stage gives you insurance: if there's a systemic quality problem, the factory still has 70% of production to fix it—saving you from an entire batch rejection.
2
Long Production Lead Times
Orders with 4-8 week production cycles benefit enormously from a mid-point check. Catching a process issue in week 3 means the factory has 3+ weeks to adjust. Without DPI, you might not discover the problem until week 7—when there's no time to fix anything.
3
New Supplier Relationships
The first 2-3 orders with a new factory carry the highest risk. DPI gives you an early read on whether the supplier can maintain quality at scale—not just on a pre-production sample. If they can't, you discover it early enough to make alternative arrangements.
4
Complex or Custom Products
Products with multiple components, tight tolerances, or custom specifications are more likely to develop quality drift during mass production. DPI verifies that every production step—assembly, finishing, packaging—is being executed to your specifications before it's too late to adjust.
The DPI Inspection Process
UTS follows a rigorous 5-step process for every During Product Inspection. Here's exactly how we protect your quality.
01
Define Standards & Checklist
We work with you to finalize the inspection criteria: your approval sample, product specifications, defect definitions, and AQL acceptance levels.
02
On-Site Sampling
Our inspector randomly selects samples from the 30-50% of finished goods following ANSI/ASQ Z1.4 statistical sampling procedures to ensure representative coverage.
03
Rigorous Inspection
Every sampled unit undergoes physical testing: visual checks, functional tests, dimension measurements, packaging verification, and workmanship assessment.
04
Defect Classification
Defects are categorized as Critical (0 AQL), Major (2.5 AQL), or Minor (4.0 AQL). If defect counts exceed AQL limits, the batch is flagged for corrective action.
05
Report & Decision
You receive a detailed PDF report within 24 hours with photos, defect data, and a clear Pass/Fail recommendation so you can decide on next steps immediately.
What DPI Checks in Detail
Our DPI inspection covers every aspect of your product's quality. Here's the complete checklist our inspectors work through.
Visual & Workmanship
- Surface finish and appearance quality
- Color consistency against Pantone/approval sample
- Assembly alignment and fit
- Welding, stitching, or bonding quality
- Coating and plating uniformity
- Burrs, scratches, dents, or cosmetic flaws
Function & Performance
- Full functionality testing per product spec
- Electrical safety: Hi-Pot, earth continuity
- Mechanical operation and moving parts
- Power consumption verification
- Button/switch/control responsiveness
- Sound, light, and display output checks
Dimensions & Specifications
- Critical dimension measurements (calipers/gauge)
- Weight verification against specification
- Material thickness and composition checks
- Component tolerance verification
- Comparison against technical drawings
- Fit testing with mating components
Packaging & Labeling
- Export carton dimensions and strength
- Inner packaging protection adequacy
- Carton drop test (ISTA 1A)
- Barcode/UPC scannability verification
- Label content accuracy and placement
- Polybag warnings and suffocation labels
Safety & Compliance
- Sharp edges and pinch points check
- Small parts detachment risk (toys)
- Flammability and material safety
- Regulatory marking verification (CE, FCC, etc.)
- User manual accuracy and language
- Age grading and warning compliance
Quantity & Production Status
- Actual production completion percentage
- Finished goods quantity verification
- Production line speed and capacity check
- Raw material inventory assessment
- Estimated completion date validation
- Factory workforce and shift assessment
Ready to Protect Your Next Shipment?
Don't wait until final inspection to discover quality problems. Book your During Product Inspection now and catch defects when there's still time to fix them.
Get Your DPI Quote TodayInternational AQL Standards We Follow
UTS conducts every DPI inspection using the ANSI/ASQ Z1.4 (ISO 2859-1) statistical sampling standard—the most widely accepted AQL methodology used by US and European importers worldwide.
This standard defines exactly how many units to inspect based on your total order quantity, ensuring statistically valid results without inspecting every single piece. Our sampling method follows the √(total cartons) + 1 formula for carton selection, combined with random unit sampling within each selected carton.
When production batches are split across different shifts, material lots, or production lines with downtime exceeding 2 hours, we treat each as a separate inspection lot—ensuring no quality variation goes undetected.
ANSI/ASQ Z1.4
ISO 2859-1
Random Sampling
Defect Classification in DPI
Every defect found during DPI is classified into one of three categories with specific AQL acceptance limits.
0
AQL Limit
Critical Defects
Hazards that could cause injury to users or violate mandatory safety regulations. Examples: exposed live wires, small parts detachment on toys, sharp edges accessible to children, product non-compliance with US/EU safety standards. Zero tolerance.
2.5
AQL Limit
Major Defects
Issues that affect product functionality, durability, or salability. Examples: non-functioning buttons, dimensional deviations beyond tolerance, cracked housing, stitching failure, color mismatch beyond acceptable range. Limited to 2.5% AQL.
4.0
AQL Limit
Minor Defects
Slight cosmetic imperfections that do not affect product use or safety. Examples: minor scratches under 1mm, slight surface marks, subtle color variation in non-visible areas. Limited to 4.0% AQL.
Industries We Inspect
UTS DPI inspection covers a wide range of product categories across major manufacturing sectors in China and Asia.
Consumer Electronics
Appliances, audio equipment, chargers, power banks, home electronics
Textiles & Apparel
Clothing, footwear, fabrics, bags, home textiles, accessories
Toys & Children's Products
Plush toys, action figures, educational toys, ride-ons, art supplies
Furniture & Home
Indoor/outdoor furniture, decor, storage, lighting, home improvement
Kitchenware & Housewares
Cookware, utensils, small kitchen appliances, tableware, food containers
Why Importers Choose UTS for DPI
With 19+ years of product inspection in China, UTS brings unmatched reliability to your quality control process.
Zero-Tolerance Anti-Bribery
Every inspector signs an integrity pledge and uses GPS check-ins at factory gates. No factory can influence inspection results. Integrity is our core product.
48-Hour Rapid Deployment
Need an inspector fast? We deploy a certified inspector to any major factory in China or across Asia within 48 hours of booking—no delays, no excuses.
Full-Time University-Educated Engineers
Our inspectors are degreed, full-time quality engineers—not outsourced freelancers. They undergo continuous product training and on-the-job performance assessments.
24-Hour Report Delivery
Your detailed PDF inspection report—with photos, defect data, and clear Pass/Fail recommendation—is delivered within 24 hours of inspection completion.
English-Speaking Account Coordinators
Communicate in English throughout the process. Your dedicated account coordinator handles booking details, clarifies report findings, and keeps you updated on inspection progress.
No Hidden Fees
No extra charges for travel expenses. No weekend inspection surcharges. What we quote is what you pay—transparent pricing, every time.
Internationally Accredited. Globally Recognized.
UTS holds the highest level of international accreditation for product inspection in China. Your DPI reports carry legal and commercial weight worldwide.
ISO/IEC 17020
International standard for inspection bodies. Certified since 2016, recognized by 77+ countries under ILAC mutual recognition.
CNAS Accredited
China National Accreditation Service accreditation against ISO/IEC 17020:2012 for inspection activities across Asia.
AQSIQ Licensed
Fully licensed by China's General Administration of Quality Supervision, Inspection and Quarantine for compliance and inspection services.
ISO 9001:2015
Certified internal quality management system ensuring consistent, reliable inspection processes across every project.
Where We Provide DPI Inspection
UTS covers all major manufacturing regions across China and 13 countries in Asia. We deploy inspectors where your factories are.
Mainland China
Guangdong
Zhejiang
Jiangsu
Fujian
Shandong
Anhui
Jiangxi
Guangxi
Hunan
Sichuan
Hubei
Henan
Hebei
Across Asia
Hong Kong
Taiwan
South Korea
Vietnam
Thailand
Malaysia
India
Indonesia
Philippines
Bangladesh
Pakistan
Turkey
Cambodia
DPI Success Stories
Real scenarios where During Product Inspection saved importers from costly quality failures.
Consumer Electronics
Power Adapter Soldering Defect Caught Mid-Production
A US importer ordered 15,000 power adapters. During DPI at 40% completion, our inspector found inconsistent solder joints on 12% of sampled units—a major defect. The factory reworked the soldering process for the remaining 60% of production, saving the entire order from rejection at final inspection.
Textiles & Apparel
Color Shade Drift Detected on 8,000 Garment Order
A European fashion brand's 8,000-piece jacket order showed progressive color drift across production batches. DPI at 35% completion revealed the dye concentration was depleting. The factory recalibrated immediately, preventing 5,200 jackets from being produced in the wrong shade.
Toys & Children's Products
Missing Warning Labels Found on Children's Toys
A toy distributor's order for 20,000 plush toys was flagged during DPI: polybag suffocation warning labels were missing on 70% of sampled units. This critical compliance issue would have caused Amazon FBA rejection and potential regulatory fines. The factory corrected labeling for all remaining production.
DPI FAQ
Common questions about During Product Inspection answered by our quality experts.
Q1: What's the difference between DPI and DUPRO?
They are the same service. DPI (During Product Inspection) and DUPRO (During Production Inspection) are interchangeable terms used in the quality control industry. Both refer to inspection conducted when 30-50% of goods are finished and packed.
Q2: Can I use my own inspection checklist for DPI?
Yes. While UTS uses ANSI/ASQ Z1.4 protocols as our baseline, we actively encourage you to provide your specific product requirements, previous defect history, or custom criteria. Our team incorporates your checklist into the final inspection protocol used on-site.
Q3: How quickly can you deploy an inspector for DPI?
We deploy a certified inspector to any major factory in China or Asia within 48 hours of booking. For urgent requests, contact our team directly—we often accommodate same-day or next-day deployments depending on location and inspector availability.
Q4: What happens if DPI reveals quality problems?
Our inspector labels and photographs all defective samples and presents findings to the factory manager on-site. You receive the detailed report within 24 hours. Since only 30-50% of production is complete, the factory has time to correct the process for the remaining batch. You can also book a re-inspection after corrections are made.
Q5: Do I need DPI if I already do Final Random Inspection (FRI)?
DPI and FRI serve different purposes. FRI is your final checkpoint before shipping—it confirms quality but offers no time to fix problems. DPI gives you a mid-production checkpoint when corrections are still possible. For high-value orders, long production runs, or new suppliers, running both DPI + FRI provides the strongest quality protection.
Q6: Do you cover factories outside of China for DPI?
Yes. UTS covers 13 countries across Asia including Vietnam, India, Bangladesh, Thailand, Malaysia, Indonesia, Philippines, Pakistan, Turkey, Cambodia, South Korea, Taiwan, and Hong Kong. Our rapid deployment applies across our entire coverage network.
Protect Your Products. Protect Your Brand.
Book your During Product Inspection with UTS today. Catch defects early, keep your timeline on track, and ensure every product meets your quality standards.
Start Your DPI Inspection Now