🚢 Need Container Ocean Freight or Fast Air Cargo from China? Book Factory-to-Door Shipping with Cina Logistics →

Request Factory Sourcing & Quote

1. Scope
2. Product Specs
3. Customization & Files
4. Submit Inquiry
🔍 Factory Sourcing
🛒 1688 Buying
📦 Sample Bundling
🛡️ Factory Audit / QC
✓

Sourcing Request Submitted!

Our agents are contacting verified factories in Shenzhen. We will be in touch within 24 hours.

China Quality Control, Factory Audits & AQL 2.5 Inspections | CINA SOURCING
SHENZHEN & PROVINCIAL ON-SITE INSPECTION GATES

China Quality Control, Factory Audits & AQL Inspections

Never release a supplier's final 70% balance based on unverified factory photos. Our on-the-ground inspection teams deploy across Guangdong, Zhejiang, and Jiangsu to execute ISO 2859-1 statistical AQL 2.5 sampling, 100% optical barcode verification, functional testing, and defect quarantine before cargo is cleared for export.

View AQL Defect Standards ↓
24–48h
Inspector On-Site Deployment Notice
AQL 2.5
ISO 2859-1 Statistical Sampling Standard
Same-Day
Photo & Video Inspection Dossier
0% Risk
Domestic Defect Rework Before Export
Production Lifecycle Gates

When & Where We Inspect Your Production

Deploy quality gates at critical production milestones to catch raw material flaws, assembly line defects, or export packaging errors before they escalate.

🏢

Factory & Supplier Audit (FA)

Comprehensive pre-contract validation before sending your deposit. We physically inspect workshop machinery, verify active Chinese business licenses, audit genuine manufacturing capacity (differentiating factories from trading middlemen), and check ISO/quality management systems.

Before Deposit Payment
⚙️

During Production Check (DUPRO)

Conducted when 15% to 50% of your mass order is molded or assembled. Our inspectors pull the first finished items off the active assembly line, checking color accuracy, component tolerances, and cosmetic finish to correct factory deviations before bulk production concludes.

At 20%–50% Production Complete
📋

Pre-Shipment Inspection (PSI)

The definitive quality gate executed when 100% of production is complete and at least 80% is packed in master cartons. We pull statistical samples under AQL 2.5 protocols to approve or reject cargo before you release the supplier's final 70% balance payment.

Before Final 70% Balance Release
Objective Decision Criteria

AQL Defect Classification & Acceptance Limits

Inspections are governed by mathematical defect tolerance formulas (ISO 2859-1 Level II), ensuring unbiased and transparent Pass/Fail determinations.

Defect Category Allowed Threshold Defect Definition & Examples Enforced Action Protocol
Critical Defects 0% (Zero Tolerance) Safety hazards, sharp metal edges, electrical short circuits, missing mandatory warning labels (e.g., suffocation polybag warnings), or non-compliant flammability. Automatic Lot Rejection: Production halted immediately; factory must rework or scrap the affected batch.
Major Defects AQL 2.5 Standard Functional failures, dimensions out of CAD tolerance, unscannable FNSKU/UPC barcodes, cracked housings, or blemish defects causing customer returns. Lot Hold & 100% Sorting: Factory must open all packed master cartons and sort out defective units at their expense.
Minor Defects AQL 4.0 Standard Cosmetic imperfections that do not impair function or reduce marketability (e.g., minor dust under packaging wrap, faint removable scuff, slight carton crease). Documented in Report: Allowed up to the statistical threshold; flagged to factory management for ongoing improvement.
Comprehensive Inspection Scope

What Our Inspectors Physically Audit on the Factory Floor

Every on-site inspection follows a rigorous 80+ point checklist customized directly to your product's technical specifications and target market regulations.

01

100% Optical Barcode Verification

Every carton and product variant is verified with handheld optical barcode scanners to ensure instant FNSKU, UPC, and GS1 readability, preventing destination warehouse receiving rejections.

02

Vernier Caliper & Weight Audits

Dimensional cross-examination using calibrated digital micrometers, vernier calipers, and precision scales to verify wall thickness, component clearance, and individual unit weight.

03

ISTA-1A Transit & Drop Testing

Packaged master shipping cartons undergo 10-point rotational drop tests from standardized heights onto hard concrete to verify inner cushioning, corner strength, and product survivability.

04

Electrical & High-Voltage Checks

For electronic goods: hi-pot insulation tests, earth continuity, power consumption under load, USB charging voltage stability, battery thermal safety, and power-on stress cycling.

05

Adhesion, Rub & Seam Pull Tests

3M tape cross-hatch adhesion checks on printed logos and paint coatings; seam pull strength checks on garments and bags; torque and mechanical resistance on moving components.

06

Packaging & Regulatory Labeling

Verification of mandatory customs markings ("Made in China" country of origin), multilingual suffocation warning polybags, carton gross/net weight markings, and pallet strapping specs.

Transparent Reporting

Same-Day Photo & Video Inspection Dossier

You never have to guess what took place on the factory floor. Within 24 hours of completing the inspection, our lead engineer compiles a detailed digital report with high-resolution imagery, raw video recordings, and an unequivocal Pass, Fail, or Pending determination.

  • ✓
    High-Resolution Macro Photography: Crisp photos of overall goods, defect close-ups with measuring tape indicators, retail gift boxes, and master carton markings.
  • ✓
    Raw Functional Video Walkthroughs: Uncut video proof of electrical power-on, functional moving parts, button actuation, and packaging unboxing.
  • ✓
    Accredited Laboratory Coordination: For products requiring formal CE, RoHS, FCC, FDA, Prop 65, or CPC compliance, we pull production samples on-site, seal them in tamper-evident bags, and dispatch directly to accredited testing labs (SGS, TÜV, Intertek).
24-Hour Digital Delivery

The Definitive Inspection Report

Actionable data to approve shipment release or enforce immediate factory rework inside China.

✓ Clear Pass / Fail / Pending Executive Verdict
✓ Defect Breakdown Quantified by Critical / Major / Minor
✓ Full Barcode Optical Scanner Verification Logs
✓ Factory Manager Signed On-Site Corrective Action Plan
Inspectors Available Across Guangdong, Zhejiang & Jiangsu
Practical Answers

Frequently Asked Quality Control Questions

Direct guidance on managing inspection protocols, defects, and factory disputes.

What happens if my production lot fails the pre-shipment inspection? +
Because the inspection occurs before you release the supplier's final balance and while the cargo remains inside China, you maintain total financial and operational leverage. We issue a formal rejection notice accompanied by our photographic dossier, require the factory manager to sign a corrective action plan, and supervise 100% sorting, component rework, or replacement of defective items at the factory's expense before re-inspection.
How much notice do you need to send an inspector to a factory? +
Our inspectors are stationed across key manufacturing hubs including Shenzhen, Dongguan, Guangzhou, Foshan, Ningbo, and Yiwu. We typically require only 24 to 48 hours advance notice to schedule an inspection. You receive the preliminary summary on the day of inspection, followed by the comprehensive digital report within 24 hours.
What is the difference between an AQL sampling check and a 100% full-piece check? +
An AQL inspection is an international statistical sampling method where a representative portion of the order (e.g., 200–315 units from a 5,000-unit lot) is pulled at random to determine if the batch meets acceptable quality limits. A 100% full check involves individual inspection of every single unit in the order. We conduct 100% full checks at our Shenzhen consolidation facility for high-value goods, consumer electronics, or fragile inventory.
Do you provide certified testing lab reports (e.g., CE, RoHS, FDA, FCC)? +
In-house quality control covers physical, dimensional, functional, cosmetic, barcode, and packaging transit testing. For specialized chemical composition, battery safety (UN38.3, MSDS), child safety (CPC/CPSIA), or radio-frequency compliance (FCC, CE), our on-the-ground team pulls production samples directly from the factory line, seals them, and coordinates formal testing through accredited third-party international testing laboratories (SGS, TÜV, or Intertek).

Need a Factory Inspected Before Balance Payment?

Send us your factory location, purchase order details, and target inspection date. Our bilingual inspection team will confirm scheduling and provide an itemized inspection proposal within 24 hours.