Quality Control
March 21, 2026
15 min read
Before placing a large order with a Chinese supplier, you need to verify they're legitimate, capable, and reliable. This comprehensive audit checklist will help you assess any manufacturer and avoid costly mistakes.
Key Principle: Never rely solely on online verification. A physical factory audit (or third-party inspection) is essential before committing to large orders.
Phase 1: Document Verification (Remote)
Before visiting, verify these documents:
β?Business License (θ₯δΈζ§η
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- Company name matches what they use
- Registration number is valid
- Business scope includes your product type
- License is current (not expired)
- Registered capital is appropriate
β?Bank Account Information
- Account name matches company name exactly
- Not a personal account
- Bank is reputable (not obscure)
β?Certifications & Compliance
- ISO 9001 (Quality Management)
- ISO 14001 (Environmental)
- Industry-specific certifications
- Product compliance (CE, UL, FCC, etc.)
- Verify certificates are authentic (check with issuing body)
Phase 2: Factory Audit (On-Site)
1. Factory Exterior & Location
- Factory address matches business license
- Signage displays company name
- Building appears well-maintained
- Security at entrance
- Parking area for employees/visitors
π© Red Flag: Trading Company Posing as Factory
If the building has multiple company names, or the factory is much smaller than claimed, they may be a trading company, not a manufacturer.
2. Production Floor
Equipment & Capacity
- Modern, well-maintained machinery
- Equipment matches claimed capacity
- Proper safety guards on machines
- Adequate number of machines for volume
- Clean, organized workspace
Production Flow
- Logical workflow from raw materials to finished goods
- Adequate space between stations
- Raw materials properly stored
- Work-in-progress organized
- Finished goods properly stored
3. Quality Control Systems
QC Department
- Dedicated QC staff (not just production workers)
- QC manager with authority to stop production
- Adequate QC staff-to-production ratio
Testing Equipment
- Testing equipment for your product type
- Equipment is calibrated and maintained
- Testing procedures documented
- Test records kept and available
Inspection Points
- Incoming material inspection
- In-process inspection
- Final inspection before packing
- AQL (Acceptable Quality Level) standards defined
4. Workforce & Management
- Adequate number of workers for claimed capacity
- Workers appear skilled and trained
- Low turnover (ask about staff retention)
- Management structure is clear
- English-speaking staff available
5. Warehouse & Storage
- Organized storage system
- Climate control if needed (for sensitive materials)
- Proper inventory management
- Fire safety equipment
- Security measures
Phase 3: Business Assessment
Financial Stability
- Company has been in business 3+ years
- Steady or growing business
- No recent major ownership changes
- Willing to provide references
- No red flags in credit checks (if available)
Communication & Professionalism
- Responsive to inquiries
- Clear, professional communication
- Willing to answer detailed questions
- Transparent about capabilities and limitations
- Realistic about lead times
π© Red Flag: Communication Issues
If they're evasive, promise unrealistic timelines, or pressure you to order quickly, proceed with caution.
Phase 4: Reference Checks
Ask for 3-5 Client References
- Contact references directly (don't just email)
- Ask about quality consistency
- Ask about on-time delivery
- Ask about communication
- Ask if they would recommend the supplier
- Check if references are real companies (LinkedIn, website)
Scoring System
Rate each category 1-5:
- 5: Excellent - Exceeds expectations
- 4: Good - Meets all requirements
- 3: Acceptable - Minor issues
- 2: Poor - Significant concerns
- 1: Unacceptable - Major red flags
β?Minimum Passing Score: 3.5/5
Don't work with suppliers scoring below 3.5. For critical products, require 4.0+.
Red Flags: When to Walk Away
π© Deal Breakers
- Refuses factory visit or video tour
- Business license doesn't match company name
- No QC department or processes
- Demands 100% upfront payment
- Pressure tactics or unrealistic promises
- Can't provide verifiable references
- Factory much smaller than claimed
- Poor safety conditions
- Child labor or unethical practices
Audit Report Template
Document your findings:
- Supplier name and location
- Audit date and auditor
- Overall score and recommendation
- Strengths identified
- Concerns or weaknesses
- Required follow-up actions
- Photos (with permission)
Need Professional Factory Audits?
Our team conducts thorough supplier audits across China. We visit factories, verify capabilities, and provide detailed reports with recommendations.
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