Start with the standard, not the inspector
Most buyers arrange inspections backwards. They find an inspection company, book a man-day, and ask the inspector to "check the quality." No spec sheet, no agreed sample, no packing requirements. The inspector walks the floor, looks at the goods, and writes something like quality is acceptable, no major defects observed. You paid $300 and learned nothing you can act on.
An inspection is a comparison. You provide the standard; the inspector reports the distance between the goods and that standard. Everything below is about building that standard and putting a qualified person in front of the goods at the right moment.
The four inspections, and which ones you need
| Inspection | Timing | The question it answers |
|---|---|---|
| Factory audit | Before you place the order | Is this a real factory, and can it handle my volume and my market requirements? |
| During production (DUPRO) | 20–40% of the order is finished | Are defects showing up early enough to fix the process? |
| Pre-shipment (PSI) | 100% produced, at least 80% packed | Do I release the balance payment and let this ship? |
| Container loading supervision | At loading | Did the right quantity, packed the right way, actually go into the container? |
For a first order with a new supplier, a factory audit plus a pre-shipment inspection covers most of the risk. During-production inspection earns its cost when the order is large, the product has many components, or the factory is running new tooling or a new material for the first time.
Write the checklist before you book anyone
Gather these documents and get them in English and Chinese:
- Product spec sheet with real tolerances (dimensions in mm, weight in grams, color codes such as Pantone numbers)
- A signed golden sample, with one copy held by the factory and one by you
- Function test list: what must work, and how it is tested
- Packaging artwork, carton dimensions, carton marks, and pallet configuration
- Label requirements: language, warnings, country of origin, importer address, age grading
- Barcode scan test, not just a visual check of the print
- Carton drop test standard if your retailer demands one (ISTA 1A is common)
- Destination-market compliance: CE, FCC, CPSIA, REACH, food-contact rules, battery documentation
If any of this is missing, the factory and the inspector will each invent their own version, and the report will reflect the inspector's version rather than yours.
AQL sampling: how many cartons actually get opened
Almost all third-party inspections use ISO 2859-1 sampling, general inspection level II. The inspector pulls a set number of pieces from the batch, checks them against your spec, and counts defects by category.
| Batch size (units) | Sample size | Max major defects (AQL 2.5) | Max minor defects (AQL 4.0) |
|---|---|---|---|
| 151–280 | 32 | 2 | 3 |
| 281–500 | 50 | 3 | 5 |
| 501–1,200 | 80 | 5 | 7 |
| 1,201–3,200 | 125 | 7 | 10 |
| 3,201–10,000 | 200 | 10 | 14 |
Two things buyers get wrong here. First, AQL is a statistical gate, not a guarantee of zero defects. A passed inspection means the defect rate is likely below your limit, not that every unit is perfect. Second, you have to define what counts as major, minor, and critical before the inspection. A cracked housing is critical. A faint logo print is minor. If you leave that to the inspector, you get their judgment, not your customer's.
When to book the inspection
Pre-shipment inspection happens when the goods are 100% produced and at least 80% packed into export cartons. Not earlier, because inspecting unpacked goods tells you nothing about the labeling and carton problems that cause most retail rejections. Not later, because once the container is sealed you have no leverage left.
Practical timing:
- Book with the inspection company 5 to 10 working days ahead. September to November and the weeks before Chinese New Year are busy, so book earlier.
- Tell the supplier the date at least a week ahead so they do not pack in a rush or delay the line to meet you.
- Leave 5 to 7 days between the inspection and the vessel cut-off. If rework or a re-inspection is needed, that buffer is what saves the shipment.
- For DUPRO, come in at 20–40% completion. That is early enough to change a mold or a material batch before the rest of the run repeats the same mistake.
Who should carry out the inspection
| Option | Typical cost per man-day | Trade-offs |
|---|---|---|
| Supplier's own QC | Free to you | They are judging their own work. Useful as a first filter, not as evidence. |
| Local third-party inspection firm | $250–$400 | Wide choice, English reports, usually 24–48 hour turnaround. Quality varies, so check sample reports. |
| International firms (SGS, BV, Intertek, TÜV, QIMA) | $300–$600+ | Strong documentation, widely accepted by retailers and for letters of credit. Higher fees, sometimes less flexible scheduling. |
| Sourcing agent's in-house QC team | Bundled into the service | Convenient if you already work with an agent, and they know your spec. Only useful if the team is independent of the factory. |
| Freelance inspector | $150–$300 | Cheapest, but no company backup, no standardized report, and no recourse if something is missed. |
Travel outside the inspector's base city is charged extra, often $50–$150. Container loading supervision runs $150–$300. Re-inspections cost the same as the first visit, sometimes with a small discount.
Booking, step by step
- Get the factory's address in Chinese characters, a contact name, a phone number, and a location pin on WeChat or Amap. If your supplier is a trading company, confirm that the inspection will happen at the actual production site, not at an office or a warehouse where goods were moved for show.
- Send the inspection company your spec sheet, checklist, packing requirements, golden sample photos, quantity ready, and the factory contact.
- Agree on the date, the start time, and the number of man-days. A 20,000-unit order across four SKUs is not a one-day job. Budget one day per SKU or per 5,000–8,000 units as a rough starting point.
- Confirm who pays. You pay the inspection company directly. Never let the factory pay the inspector, even as a favor.
- The inspection takes place. Most firms send photos during the visit and the full report within 24–48 hours.
- You decide: release for shipping, request rework, re-inspect, or hold the balance payment.
What a usable report contains
A proper report is not a one-page summary. It should include photos of each defect with a description and a count, the exact quantity checked, defect classification by major, minor, and critical, measurements against your spec, a packaging and labeling check, carton weight and dimensions, a barcode scan result, the conclusion for each SKU, and the inspector's signature and company stamp. If you cannot hand the report to your customer or your insurer and have it mean something, it is not finished.
Mistakes that cost real money
- Inspecting too early. Goods that are 60% packed get a 60% answer.
- One man-day for a large or multi-SKU order. The inspector samples what they can reach in the time available and the rest goes unchecked.
- Letting the supplier choose the inspector. You may get a report written by the factory's neighbor.
- No golden sample. Disputes about color, finish, or fit become a matter of opinion.
- Ignoring packaging and labels. Retailers reject shipments over carton marks and missing warnings far more often than over the product itself.
- Skipping loading supervision on high-value goods. Substitution and short-loading happen at the loading dock, not on the production line.
- Not budgeting time for failure. An inspection with no room for rework is just an expensive notification.
If the batch fails
Failing an inspection is not the end of the order. It gives you a documented position to negotiate from. Options, roughly in order:
- Rework on site and re-inspect. Best outcome if the timeline allows.
- Ship the conforming portion and hold back the defective units for credit.
- Negotiate a price reduction that reflects the actual defect rate, with the defects photographed and counted.
- Hold the balance payment. If your purchase order makes the balance due after a passed inspection, you already have the leverage you need.
Get the failure in writing, with photos, before you speak to the supplier. A conversation about quality is much shorter when you can send the report first.
Tie the inspection to payment and freight
Two structural moves make inspections far more effective. First, write the payment terms so the balance is due only after a passed pre-shipment inspection. A 30/70 split with the 70 released on the report is standard and the factory will accept it. Second, give your freight forwarder the inspection date when you book the space. If the inspection slips, you want to know before the container is scheduled, not after.
A simple timeline for a first order
| When | What happens |
|---|---|
| Order placed | Factory audit if you have not visited |
| 30 days out | Confirm spec sheet, golden sample, packing artwork |
| 15 days out | Book the pre-shipment inspection, confirm the factory address and date |
| 10 days out | Send the checklist and requirements to the inspector |
| Inspection day | Goods 100% produced, 80%+ packed |
| +2 days | Report received, decision made |
| +5 to 7 days | Rework and re-inspection window if needed |
| Vessel cut-off | Container loaded, loading supervision if required |
If handling the bookings, the Chinese addresses, and the reports yourself is more overhead than you want, Globesino runs factory audits, pre-shipment inspections, and delivery from the factory floor to your forwarder as one coordinated service. You deal with one local team instead of five vendors.