Most sourcing problems in China don't start with a dishonest factory. They start with a buyer asking the wrong question at the wrong moment.
A pre-shipment inspection that comes back passed says nothing about whether the supplier can handle your next 5,000 units. A factory audit with a clean report says nothing about whether the units in carton 47 have the right plug. Confusing the two is one of the more expensive mistakes overseas buyers make, and it is easy to avoid once you know what each one is for.
The short answer
| Factory audit | Product inspection | |
|---|---|---|
| Question it answers | Can this supplier do what I need, repeatedly? | Is this specific batch correct? |
| When | Before the first order, then yearly | During and after production, before final payment |
| Looks at | The company: license, capacity, machines, staff, systems, compliance | The goods: quantity, function, appearance, packaging, labels |
| Scope | Whole site, documents, interviews | Statistical sample drawn from the batch (AQL) |
| Duration | 1–2 days on site | 4–8 hours |
| Typical cost in China | USD 500–1,500+ | USD 250–400 per man-day |
| Output | Audit report, photos, risk rating, corrective actions | Inspection report with defect classification |
| Fails when | It is done on a showroom or a trading company's office | It is done too early, or on a sample the factory picked |
Rule of thumb: if you have not placed the order yet, audit. If the goods already exist, inspect.
What a factory audit actually checks
An audit looks at the supplier as a business and as a production system. Depending on scope, a useful audit covers:
- Legal identity — business license, registration date, registered capital, and whether the stated business scope actually includes manufacturing
- Address match — the address on the license versus the site the auditor is standing in
- Ownership model — manufacturer, trading company, or a factory with several trading arms
- Capacity — number of lines, machines, shifts, monthly output, current backlog
- Process — what is done in-house and what is subcontracted
- Quality system — incoming material checks, in-process checks, final checks, calibration, defect records
- People — headcount, QC staff ratio, technical staff, turnover
- Compliance — social compliance (amfori BSCI, SMETA, WRAP), fire safety, environmental permits
- Sub-suppliers — who supplies the critical components
Common audit types include the supplier qualification audit (first time), the quality system audit (ISO 9001 style), social compliance audits driven by retail customers, capability audits for a new product, and security audits such as C-TPAT or SCAN for US-bound cargo.
A good audit ends with a risk rating and specific corrective actions, not a page of ticks.
What a product inspection actually checks
The standard tool is AQL sampling under ISO 2859-1. Most consumer goods inspections use General Inspection Level II with AQL 2.5 for major defects and 4.0 for minor ones, unless your category calls for something tighter.
Timing options:
- During production (DUPRO) — usually at 20–60% completion, so problems can still be fixed
- Pre-shipment (PSI) — production finished and packed, before the balance payment; the most common choice
- Container loading check (CLC) — watches goods go into the container, confirms quantity and loading conditions
What gets checked: quantity and carton count, function, appearance and workmanship, dimensions and weight, materials, labeling and barcodes, packaging strength, plus anything specific in your spec.
An inspection cannot test everything. Sampling means defects can be missed, and lab work (chemical, electrical safety, food contact) is a separate service. If your spec sheet is vague, the report will be vague too — the checklist matters as much as the inspector.
Where buyers mix them up
Using an inspection as a supplier check. A first order with a new supplier and no audit is the pattern we see most often. The inspection passes, the second order is late and short, and only then does anyone ask how many lines the factory actually runs.
Auditing a trading company's office. Plenty of factories listed online are trading companies. That is not automatically bad — good ones manage quality well — but the audit needs to be scoped to what you are buying: their QC process, their sub-suppliers, and the workshop where your product is made.
Inspecting too early. An inspection on unpacked goods, or on a batch where 40% is still on the line, gives you a snapshot that means very little. Wait until packing is complete.
Letting the factory choose the sample. Inspectors draw samples at random from the finished batch. If someone hands you the good one, you are not inspecting, you are being shown a demo.
Skipping the written spec. Inspectors check against your requirements. No spec, no approved sample, no agreed tolerance, and the report becomes a matter of opinion.
Red flags worth stopping for
- The license address and the production address do not match, and nobody can explain why
- The auditor is not allowed to photograph the workshop or count the machines
- Production is quiet during what should be peak season for your order
- A large share of the process is subcontracted to unnamed workshops
- Defect classification changes between two inspections of the same product
Cost and timing
| Item | Typical lead time | Typical cost (China) |
|---|---|---|
| Supplier qualification audit | 5–10 working days | USD 500–1,200 |
| Social compliance audit | 1–2 weeks | USD 800–2,000 |
| During-production inspection | 3–5 working days | USD 250–400 per man-day |
| Pre-shipment inspection | 3–5 working days | USD 250–400 per man-day |
| Container loading check | 3–5 working days | USD 200–350 |
Add travel costs for remote sites, and expect longer lead times in the three weeks before Chinese New Year and during the September–October shipping peak. Compare the fee against the cost of one rejected container; the fee is usually the smaller number by a wide margin.
Ask for reports in English, with timestamped photos, defect classification, and a clear pass, fail, or pending decision. Request the raw photo set, not just the PDF summary.
The sequence that works
- Screen suppliers on paper — license, product fit, export experience, references
- Audit the shortlisted supplier before paying a deposit, especially for custom or tooling-heavy products
- Agree a written spec and a golden sample in English and Chinese
- Book a during-production check on the first order, at 30–50%
- Book a pre-shipment inspection before the balance payment — never release money on factory photos alone
- Re-audit once a year, or whenever ownership, address, or your product changes
If an inspection fails, you usually still have options: rework and re-inspect, negotiate a price adjustment, or cancel according to your contract terms. That is precisely why the inspection belongs before final payment, not after the container has sailed.
What neither tool covers
Neither an audit nor an inspection tells you whether the product will sell, whether the price is competitive, or whether the supplier will prioritize you when they are busy. Those answers come from order history, references, and someone on the ground who can call the factory in Chinese and ask what is really happening on the line this week.
That is the gap most overseas buyers cannot close alone. Globesino runs supplier sourcing, factory audits and product inspections in China, then follows through to consolidation, shipping and delivery with English-language reporting at each step.