How to Conduct a Factory Audit in China: What to Look For

A factory audit in China is more than a site visit. It verifies capacity, quality systems, and business integrity. A clear audit stops costly surprises. This guide gives a step-by-step checklist. Use it to plan audits, spot risks, and act on findings.

Before the Audit: Preparation

Set objectives. Decide if you need a supplier qualification, pre-production review, or social compliance check.
Collect documents in advance. Request the business license, tax registration, export license, and recent test reports.
Agree scope. Define product lines, shift times, and areas to inspect. Book the right amount of time. Typical audits take 4–8 hours for a medium-sized factory.
Bring the right team. Include a quality engineer, a purchasing lead, and a compliance specialist when needed.
Create a checklist. Use standards like ISO 9001 and customer-specific requirements as a baseline.

Key Areas to Inspect

1. Legal and Administrative Documents

Business license and unified social credit code. Confirm company name and scope match your contract.
Export license and customs registration. Ensure lawful export capabilities.
Certificates and test reports. Check authenticity for ISO, CE, RoHS, and third-party lab reports (SGS, BV, Intertek).
Insurance and contracts. Look for product liability insurance and major supplier agreements.

2. Production Capacity and Layout

Production lines and takt time. Measure output per shift. Ask for historical production logs.
Equipment list. Verify key machines and their serial numbers.
Maintenance records. Look for preventive maintenance schedules and calibration logs.
Floor layout and workflow. Evaluate material flow, bottlenecks, and storage areas.

3. Quality Management

Quality manual and procedures. Confirm documented IQC, IPQC, and OQC processes.
Inspection records. Review SPC charts, incoming raw material checks, and defect trend data.
First Article Inspection (FAI). Request FAI reports for new products or tooling changes.
Testing lab. Check internal lab equipment, calibration stickers, and test methods.

4. Materials and Traceability

Supplier list and material certificates. Verify MTRs and supplier traceability for critical parts.
BOM and batch records. Confirm accurate Bills of Materials and lot tracking.
Storage conditions. Inspect warehousing, FIFO practice, and hazardous material handling.

5. Workforce and Labor Practices

Employee IDs and payroll records. Check legal hiring and wage payments.
Working hours and overtime logs. Ensure compliance with Chinese labor law and your contract terms.
Training records. Look for quality training and safety briefings.
Social insurance and benefits. Confirm contributions for full-time staff.

6. Health, Safety, and Environment

Fire safety. Verify fire exits, extinguishers, and evacuation plans.
PPE and safety signage. Ensure workers have proper protective gear.
Environmental permits. Check waste disposal, emissions controls, and chemical storage.
MSDS for chemicals. Confirm material safety data are available and current.

7. Intellectual Property and Subcontracting

IP protection measures. Look for restricted access to tooling, drawings, and samples.
Subcontractor list. Verify whether critical processes are outsourced and audited.
Tooling and mold ownership. Confirm who owns molds and where they are stored.

Sampling and Product Checks

Inspect finished goods and in-process samples. Use AQL sampling for large lots. For standard AQL 2.5/4.0, sample sizes vary by lot size. When quality is critical, request full inspection of key attributes.

Measure dimensions with calibrated tools.
Confirm function through tested samples.
Check packaging. Inspect labels, barcodes, and carton strength.
Run a short production trial if possible. Validate process stability.

Red Flags to Watch For

Inconsistent or missing records. Missing payroll or blank quality logs are a concern.
Locked production areas with no reason. Hidden areas may indicate subcontracting.
Unlabeled chemicals or no MSDS. This risks compliance fines and worker safety.
Frequent staff turnover. High turnover often reduces quality consistency.
Certificates that look altered. Cross-check with issuing bodies or third-party databases.

Documenting Findings and Follow-Up

Take time-stamped photos and videos. Capture serial numbers and control points.
Write a clear audit report. Include non-conformances, evidence, and risk rating.
Require corrective action plans. Set deadlines and responsible persons.
Schedule re-audits for serious issues. Track closure of all action items.

Practical Tips for Better Results

Use a local auditor when language is a barrier. This speeds interviews and document checks.
Plan audits around production schedules. Avoid visiting during shutdowns or holidays.
Be concise in requirements. Share clear specs and acceptance criteria before the audit.
Combine audits with sample checks. This saves time and provides a real product snapshot.

How Supplier Ally Can Help

Supplier Ally (https://sourcingall.com) provides factory audit services across China. We offer qualified auditors, standardized checklists, and full audit reports with photos. Use a third-party audit when you need unbiased evidence. A professional audit reduces risks and speeds sourcing decisions.

Final Checklist (Quick)

Legal documents verified
Production capacity observed
Quality systems and records checked
Materials and traceability confirmed
Workers’ records and safety verified
IP protection and subcontracting status confirmed
Samples measured and tested
Report issued with corrective actions

Follow this checklist on every major supplier. A solid audit saves time and money later. If you need help, contact Supplier Ally at https://sourcingall.com for professional audit services and local support.