A factory audit is a structured check of whether a supplier’s identity, processes, people, equipment, and records support its claims. It is not the same as a product inspection: an audit evaluates the production system, while an inspection evaluates a defined quantity of goods at a point in time.
This checklist helps an overseas buyer scope an audit before a first order or major product change.
Define the audit objective first
Do not begin with a universal scorecard. Write down the decision the audit must support.
Examples:
- Is this the factory represented in the quotation?
- Can it make the specified product and critical processes?
- Is stated monthly capacity credible for our order and season?
- Can it control a safety-critical component?
- Does it have a functioning quality system for repeat production?
- Which processes are subcontracted and how are they controlled?
Provide the auditor with the product specification, expected order volume, critical-to-quality characteristics, claimed certifications, proposed process flow, and known risks. Without product context, an audit may produce a neat score that does not answer the buying decision.
1. Company and site identity
Verify the business license, Chinese legal name, unified social credit code, registered address, operating address, legal representative, and the relationship between the factory, exporter, and payment entity.
On site, compare the address and company name with entrance signage, production records, employee information, utility or lease evidence where appropriate, and document headers. Record other businesses operating at the same premises.
Ask management to explain ownership, affiliated companies, major recent changes, and which entity owns the machinery and tooling.
2. Organization and responsibility
Review the organization chart and interview people responsible for engineering, production planning, purchasing, quality, and export coordination.
Look for clear authority to:
- approve materials and suppliers;
- release production;
- stop a process when defects occur;
- accept rework;
- approve product or process changes;
- release finished goods for shipment.
If every operational answer must come from one salesperson, the apparent organization may not be controlling the work.
3. Relevant manufacturing capability
Walk the actual process from incoming material to finished-goods storage. Record the equipment manufacturer, model or type, quantity, condition, and whether it was operating.
Focus on equipment relevant to your product. A large facility can still lack the process that determines your quality. Ask:
- Which machine or line will run the order?
- Is tooling standard or product-specific?
- Who programs or sets up the process?
- What parameters are controlled and recorded?
- What preventive maintenance is scheduled?
- Which steps are manual?
- Which operations leave the site?
For outsourced processes, identify the subcontractor and examine qualification, incoming verification, traceability, and change-notification controls.
4. Capacity and production planning
Capacity claims need assumptions. Calculate from available hours, cycle time, yield, changeover, maintenance, and existing demand—not from a sales estimate alone.
Request a recent production schedule and compare planned versus actual output. Check peak-season loading, labor availability, bottleneck processes, backup equipment, and lead times for critical materials.
A useful capacity statement is specific: “two lines, eight effective hours per shift, 45-second cycle, 85% expected uptime, 95% first-pass yield.” A statement such as “500,000 units per month” without a calculation is not decision-grade evidence.
5. Supplier and incoming-material control
Review how the factory approves and monitors material and component suppliers. Ask for an approved-supplier list, purchase specification, incoming inspection plan, receiving records, and disposition of failed material.
Confirm:
- critical materials are uniquely identified;
- certificates or declarations are matched to received lots;
- inspection frequency reflects risk and supplier performance;
- rejected material is physically segregated;
- substitutions require authorization;
- lots remain traceable into production where required.
Material substitution is a common source of hidden cost and compliance risk. Contractual wording is useful only when the factory’s receiving and production systems can enforce it.
6. Process control and work instructions
At the production line, compare current work with the approved specification. Work instructions should be available to operators and should show the correct product revision, process parameters, visual standards, and inspection points.
Look for evidence that first-piece approval, line clearance, parameter checks, and changeovers are controlled. Interview an operator: ask what defect they check, what limit applies, and what they do when it is exceeded.
7. Inspection, testing, and calibration
Review the control plan or inspection plan from incoming to final release. Measurements should have defined characteristics, method, sampling or frequency, acceptance limits, and responsible person.
For measuring and test equipment, check:
- unique identification;
- suitable resolution and range;
- calibration status and due date;
- protection from damage or unauthorized adjustment;
- action when equipment is found out of calibration.
Witness a test if possible. A laboratory room or instrument list does not prove the required method is performed correctly.
8. Nonconforming product and corrective action
Failed product should be identified, segregated, recorded, and dispositioned by authorized staff. Look for physical red-tag areas and completed records.
Select a recent significant defect and trace it through containment, root-cause analysis, corrective action, and effectiveness review. Repeated “operator training” answers may indicate that the underlying process cause was not addressed.
9. Traceability and change control
Ask the factory to trace a finished carton backward to production date, line, material or component lots, and inspection records—at the level your product risk requires.
Review how design, material, component, tooling, process, factory-location, and subcontractor changes are proposed and approved. The purchase agreement should require buyer approval for defined changes, while the factory needs an internal method to stop unapproved changes from reaching production.
10. Packaging, storage, and shipment
Inspect protection of raw material, work in progress, and finished goods. Check environmental controls where moisture, temperature, dust, shelf life, or electrostatic discharge matters.
Compare the proposed packaging with actual equipment and storage practice. Verify carton marking, barcode control, pallet rules, quantity reconciliation, loading checks, and final shipment release.
Report findings so they support a decision
Classify findings by risk rather than only assigning points:
- Critical: identity fraud, unsafe condition, missing essential process, deliberate falsification, or issue that makes approval unacceptable.
- Major: systemic weakness likely to affect conformity, delivery, traceability, or compliance.
- Minor: isolated weakness that should be corrected but is unlikely by itself to cause product failure.
- Observation: improvement or clarification without a demonstrated nonconformity.
Each finding should cite the requirement, objective evidence, risk, required action, owner, and due date. Request proof of correction and verify major actions before production or deposit when they affect the sourcing decision.
Audit limitations
An audit samples a site on a particular date. It does not guarantee future capacity or product quality, and it may not detect undisclosed subcontracting after the visit. Combine the audit with a controlled specification, approved samples, testing where needed, production monitoring, and pre-shipment inspection.
The most useful audit conclusion is not “pass” or “fail.” It is a clear statement of what was verified, what was not, which risks remain, and what must happen before the buyer releases the next commercial milestone.
Continue the sourcing workflow
- Complete the legal and payment checks in the Chinese supplier verification guide.
- Read the finished report critically with the China factory audit report guide.
- Map factory capacity evidence against the China manufacturing lead-time guide.
- Turn audit risks into release criteria with the pre-shipment inspection checklist.