A bad shipment rarely fails at the port. It fails weeks earlier, in a factory that quietly swapped a thinner plastic, dropped a stitch per inch, or packed 480 units into a carton marked 500. By the time the container reaches your warehouse, the cheapest moment to fix it has already passed. Inspection is how you buy that moment back.
This guide covers the practical side: which inspection to book, when to book it, what to write in the instructions, what it costs, and what to do when the report comes back red.
What "inspection" actually covers
Buyers often say "please inspect the goods" and mean four different things. Being specific with whoever does the work saves arguments later.
| Area | What gets checked | Why it matters |
|---|---|---|
| Quantity | Units per carton, cartons per pallet, total count | Short shipments are the most common quiet loss |
| Quality | Function, dimensions, finish, material, color | Some defects only appear under test, not under light |
| Packaging | Inner box, carton strength, printing, barcodes, labels | Retail and marketplace rejections usually start here |
| Compliance | Certificates, safety marks, label language | Customs holds and listing suspensions |
A standard pre-shipment inspection covers all four at a basic level. Lab testing for chemical or safety standards is a separate service and a separate cost.
The five points on a production timeline
Most buyers only book the pre-shipment check. That is the minimum, not the best value.
| Stage | When | What it catches |
|---|---|---|
| Factory audit | Before you pay a deposit | Whether the supplier is a real factory, its capacity, its licenses, its actual production lines |
| Pre-production check | Raw materials in, first articles made | Wrong material, wrong color, wrong components, before 5,000 units are wrong |
| During production (DUPRO) | 20–40% of the order produced | Process problems while they are still fixable |
| Pre-shipment inspection (PSI) | All goods produced, at least 80% packed | Final quality, quantity, packing, and markings |
| Container loading supervision | At loading | Carton count, condition, mixed SKUs, container humidity, seal number |
If your budget only stretches to one inspection, make it the pre-shipment check. If your order is custom, high-value, or from a new supplier, add the during-production visit. It catches problems while rework is still cheap.
Set the standard before the factory sets it for you
"Good quality" is not an instruction. AQL (Acceptable Quality Limit) is the shared language inspectors use, and it is worth understanding even if you never calculate it yourself.
A typical setup:
- Critical defects: 0 allowed. Safety issues, electrical hazards, anything that could injure a user.
- Major defects: AQL 2.5. The product does not work or would be returned by a customer.
- Minor defects: AQL 4.0. Cosmetic issues a customer would notice but tolerate.
In practice: for a 3,000-piece order at general inspection level II, the inspector pulls 125 pieces at random. At AQL 2.5 major, the lot fails if more than 7 of those 125 show a major defect. Tighten to AQL 1.5 and the threshold drops to 5.
Two things buyers get wrong here. First, they let the factory suggest the AQL. Second, they set AQL 1.0 on a low-cost commodity item and then wonder why every shipment fails. Match the standard to the price point and to what your customer will actually complain about.
Write a checklist the inspector can use
An inspector working from a one-line product name will inspect something. It may not be what you ordered. Send a document, not a message.
Include:
- Product name, model number, order quantity, SKU list
- A spec sheet with dimensions, weight, material, color code (Pantone or hex), and tolerances
- Function tests: what the product must do, and for how long
- A golden sample, or clear photos of an approved unit from every angle
- Packaging details: inner box size, carton size, units per carton, carton weight limits, drop test requirement
- Labeling: barcode type and number, warning text, language, country of origin mark
- Accessories and manuals that must be in the box
- Anything you specifically do not want (for example, no glue residue, no visible mold lines on the front face)
Photos help more than paragraphs. A marked-up image showing where a scratch is unacceptable does more than two pages of description.
Who should do the inspection
| Option | Best for | Watch out for |
|---|---|---|
| Third-party inspection company | Standard pre-shipment checks, comparable reports | They inspect what you tell them; a weak checklist gives a weak report |
| Sourcing agent with local staff | Buyers who also need supplier contact, negotiation, and follow-up | Confirm whether the inspector is independent from the supplier relationship |
| Your own employee | Large, ongoing programs | Travel time, visa logistics, language gaps |
| Supplier's internal QC report | Nothing on its own | It is the supplier grading its own homework |
Whoever you use, make sure the visit is unannounced or announced only on the day. Factories that know the date three weeks ahead can prepare a very nice sample table.
What it costs and how to book
In Guangdong, Zhejiang, Fujian, and Jiangsu, a standard man-day inspection typically runs USD 100–300, plus travel if the factory is far from the inspector's base. Remote provinces cost more. Loading supervision is usually a half-day rate.
Booking notes:
- Book 3–7 days ahead in normal periods, 2 weeks ahead around Chinese New Year, Golden Week, and peak season (August–October).
- Factories close for roughly two weeks at Spring Festival. Inspections in the last week before the holiday are rushed and often skipped.
- Confirm the factory address in Chinese, the contact name, and the production completion status before paying.
Tricks worth knowing about
- Sample switching. A perfect sample is approved, then production uses a different material. The golden sample in the inspector's hand is your only defense.
- Quantity shorting. Cartons are full on the top layer and short below. Counting matters, not sampling.
- Mixed grades. 10% of units are first quality, the rest are seconds. Ask for a random pull across cartons, not from the front row.
- The trading company problem. You audit one factory, production happens at another. Check business license names against the invoice.
- Recycled inspection photos. Old photos with no timestamp, or photos that show a different carton design than your order.
- Defects hidden by packing. Ask for at least some units to be opened and tested out of the retail packaging.
How to read the report
A useful report has timestamped photos, defect counts by category, carton dimensions and weights against your spec, sample size and AQL used, and a clear pass or fail. Look past the summary page. The remarks section is usually where the inspector quietly says the packing area was messy, the labels were reprinted, or the factory could not explain where 200 units went.
A "pass" with four concessions is not a clean pass. Read what you conceded.
When the report says fail
You have options, and they are better than refusing the container:
- Ask for rework and a re-inspection, with the cost of the second visit on the supplier.
- Ask for 100% sorting, with the supplier paying for the sorted-out units.
- Negotiate a price adjustment for a cosmetic-only defect, if the product is still sellable.
- Delay the shipment, and make sure your sales timeline can absorb it.
- Hold the balance payment. This is why a 30% deposit and 70% before shipment beats paying in full.
Get any agreement in writing, in the same thread as the order, before the goods leave the factory.
Video inspection is useful, not equal
A live video call lets you see the line and ask questions in real time, which is genuinely helpful for a first order or a new supplier. It is not a replacement for an on-site inspection. Camera angles are chosen by someone, lighting hides finish defects, and nobody on a video call counts 400 cartons.
A pre-shipment checklist you can copy
- [ ] Spec sheet and golden sample sent to the inspector
- [ ] AQL levels confirmed in writing (critical 0, major 2.5, minor 4.0 as a starting point)
- [ ] Quantity per carton and total carton count verified
- [ ] Carton drop test and stacking requirement stated
- [ ] Barcodes scanned and matched to your list
- [ ] Label language and country of origin mark checked
- [ ] Function test performed on a sample of units out of packaging
- [ ] Accessories and manuals counted in at least five cartons
- [ ] Photos with timestamps received
- [ ] Container seal number recorded at loading
None of this is complicated. It is just a series of small checks that most buyers skip until the first bad container teaches them otherwise. If you would rather have someone in China handle the factory calls, the inspection booking, and the follow-up on rework in Mandarin, Globesino does exactly that for overseas buyers and small teams without a local office.