China Factory Audit Checklist: What UK Buyers Should Check

Before committing to production with a new Chinese supplier, a factory audit is one of the most valuable steps you can take. It allows you to verify that the supplier is who they say they are, assess whether they have the equipment and capability to manufacture your product, and understand how they manage quality.

An audit does not guarantee future production quality. A factory can perform well during an audit and still have problems during production. But it significantly reduces the risk of discovering fundamental problems after you have placed an order and paid a deposit.

This checklist covers the main areas a thorough factory audit should address.

1. Company Identity and Legal Status

Before anything else, establish that the business is legitimate and that you are dealing with who you think you are.

• Verify the company's business licence — name, registration number, registered address, business scope
• Confirm the factory address matches the registered address (or understand why it does not)
• Check that the business scope covers the products you intend to source
• Confirm who owns the business and who has authority to enter into contracts

This sounds basic, but trading companies sometimes present themselves as factories, and factory addresses on websites do not always match the actual production location.

2. Factory Location and Premises

• Visit the actual production facility, not just a showroom or sales office
• Assess the size and condition of the premises
• Check whether the factory is owned or leased
• Note the general state of housekeeping and organisation — a well-organised factory is not a guarantee of quality, but a chaotic one is a warning sign

3. Is This Factory Actually Manufacturing Your Product?

This is one of the most important questions in the audit.

• Ask to see the production area where your product would be made
• Identify whether the processes required for your product are performed in-house or subcontracted
• If processes are subcontracted, establish to whom and what oversight the factory exercises
• Ask to see examples of similar products currently in production

A factory that subcontracts key processes is not automatically unsuitable, but you need to understand the supply chain and who is responsible for quality at each stage.

4. Production Equipment

• Identify the main equipment relevant to your product
• Check that the equipment is appropriate for the specification — a factory with basic machinery is not suitable for precision work
• Assess the condition and maintenance of equipment
• Check whether equipment is calibrated where relevant (measuring instruments, test equipment)

For CNC machining, this means checking the machines available, their age and condition, and the range of work they can handle. For fabrication, it means welding equipment, press brakes, laser cutters, and finishing equipment.

5. Workforce

• Assess the size of the workforce relative to the factory's claimed capacity
• Check whether workers appear to have relevant skills for the product
• Ask about staff turnover — high turnover in key roles can affect quality consistency
• Identify who is responsible for quality inspection

6. Manufacturing Processes

Walk through the production process for your product type:

• What are the main manufacturing steps?
• Which steps are performed in-house?
• Which are subcontracted, and to whom?
• What are the critical process parameters, and how are they controlled?

Understanding the process in detail helps identify where quality risks are most likely to arise.

7. Raw Material Control

• How does the factory source raw materials?
• Are materials from approved suppliers?
• Is there incoming inspection of materials?
• How are materials stored and identified?
• Is there traceability from raw material to finished product where relevant?

Material substitution — using a lower-grade material than specified — is one of the more common quality problems in Chinese manufacturing. Understanding how the factory controls its materials reduces this risk.

8. In-Process Quality Control

• Are there defined inspection points during production?
• Who performs in-process inspection — dedicated quality staff or production workers?
• What measuring and inspection equipment is available?
• How are non-conforming items identified and segregated?
• What records are kept?

9. Measuring and Inspection Equipment

• Is there appropriate measuring equipment for your product — callipers, gauges, CMM, test equipment?
• Is measuring equipment calibrated?
• Are calibration records available?

For precision components, the absence of appropriate measuring equipment is a serious concern.

10. Non-Conforming Product Procedures

• How does the factory handle products that fail inspection?
• Are non-conforming items clearly identified and segregated?
• Is there a defined procedure for rework, repair, or rejection?
• Are non-conformance records maintained?

11. Production Capacity

• What is the factory's current production capacity for your product type?
• What is the current order book — are they at capacity?
• Can they meet your required lead times?
• What happens to your order if a larger customer places an urgent order?

12. Existing Production

Ask to see what is currently being produced. This gives you a realistic picture of the factory's actual work rather than their best showcase samples.

• What products are currently on the production floor?
• Who are their existing customers?
• Can they provide references?

13. Finished Goods Storage

• How are finished goods stored before shipment?
• Is storage appropriate for the product — temperature, humidity, protection from damage?
• Are finished goods clearly identified and segregated by order?

14. Packaging

• Does the factory have packaging capability in-house, or is packaging subcontracted?
• Can they meet your packaging specification?
• How are packaged goods protected during transit?

15. Export Experience

• Does the factory have experience exporting to the UK or EU?
• Are they familiar with relevant regulatory requirements for your product?
• Do they have experience with the documentation required for UK import?

What a Factory Audit Can and Cannot Tell You

A factory audit gives you a snapshot of the factory at the time of the audit. It can tell you whether the factory has the equipment and apparent capability to manufacture your product, whether their quality systems look credible, and whether there are obvious warning signs.

It cannot guarantee how the factory will perform during your production run. Factories change — staff leave, equipment breaks down, management priorities shift. An audit is a starting point for a supplier relationship, not a permanent endorsement.

This is why ongoing production monitoring and inspection remain important even after a satisfactory audit.

For UK businesses without the ability to conduct audits in person, working with a China sourcing service that has people on the ground in China can provide access to professional factory assessment without the cost and time of travelling to China yourself. This is one of the key functions of a UK China sourcing partner — having an experienced team in China who can assess factories, verify capability and report back before you commit to production.

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Related Articles

• Factory Audits in China for UK Businesses
• How to Find a Reliable Manufacturer in China
• How to Verify a Chinese Supplier Before Paying a Deposit
• Quality Control in China: A Practical Guide for UK Importers

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Sauce Asia has conducted factory audits across China for more than 25 years. Our China-based team can visit factories, assess capability, and provide honest assessments of whether a supplier is suitable for your requirements.

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Colin Moore has worked with Chinese manufacturers since 1999 and leads Sauce Asia's client relationships and sourcing strategy. Sauce Asia supports UK businesses with supplier sourcing, manufacturing, factory audits, production management, quality inspection and shipping from China.