What Happens During a Knitwear Pre-Shipment Inspection

By YZR Sweaters · 2026-10

Buyers who've never arranged an inspection tend to picture someone glancing at a few sweaters and stamping a form. The real thing is more methodical, and understanding what the inspector actually does — and what they can't do — is the difference between a report you can act on and a document you file and forget.

When it happens and who does it

Timing matters more than most buyers realise. A PSI is scheduled when production is complete and at least 80% of the order is packed into cartons. Earlier, and the inspector is checking work in progress; later, and the goods may already be on the water. Book it as soon as the factory gives you a packing date, and note that third-party firms (SGS, Bureau Veritas, QIMA and others) typically need two to five working days of lead time to get an inspector to a Dongguan factory.

You have three options for who inspects: your own team if you're visiting, a third-party inspection company, or the supplier's internal QC with documented evidence. They're not equivalent. Internal QC is free and useful, but it's marking its own homework; third-party costs USD 200–400 per man-day and is the version that stands up if there's a dispute. On most orders we run both — our own full inspection first, and a third-party PSI whenever the buyer asks for one.

What the inspector actually checks

The day follows a fixed structure. The inspector verifies the total quantity produced, then selects cartons using a random sampling plan based on lot size — this is where the AQL tables come in, and our AQL guide explains how to read those numbers on the report. From those cartons, garments are pulled and checked against:

• The approved sample. The inspector works from the sealed sample you signed off, not from memory. If your approval process was vague, this is where it catches up with you — the sample review checklist is what makes the sample worth comparing against.
• Workmanship. On knitwear the usual findings are loose linking threads at seams, dropped stitches, uneven rib tension at cuffs and hems, oil marks from machines, and mending that should have been done before packing. Each defect is classed as critical, major or minor against the AQL levels you set.
• Measurements. A size set is measured against your size chart, within tolerance. If your spec says ±1cm at the chest, that's what gets checked — which is why the points of measure need to be written into the order, not assumed.
• Labelling and packing. Fibre content and care labels against the rules for your destination market (see our labelling rules article), hangtags, polybag warnings, carton markings, assortment per carton, and gross weight against the packing list.
• Function and safety checks where relevant — button pull tests on children's styles, needle detection records, and so on.

What the report tells you — and what it can't

By the next morning you have a report: quantities verified, defects found by category, measurement tables, photos, and an overall result of pass, fail, or "pending" pending your decision. Read the defect photos before the verdict — a "pass" with clustered minor defects at the same seam tells you something a verdict alone doesn't.

Two honest limitations. First, a PSI is a sample of the order, statistically sound but not a guarantee that every carton is identical — that's what in-process checking during production is for. Second, an inspector checks what exists. If the yarn isn't what you specified, a visual inspection may not catch it; that's a lab testing question, not an inspection one.

What to do with a fail — and a borderline pass

A fail is not a disaster; it's the system working. The usual outcomes are rework and re-inspection (the factory sorts or repairs the affected goods and you pay for a shorter follow-up inspection), a negotiated discount with the defects documented, or rejection of the affected portion. Which one is right depends on the defect, the deadline, and whether the problem is fixable — loose threads are a sorting job, a mis-labelled fibre content is a re-labelling job, wrong measurements are usually neither.

The borderline pass is the harder call, and it's where your quality standards document earns its keep: if "acceptable" was defined in writing before production, the decision is already made. If it wasn't, you're negotiating under time pressure with the goods on the floor.

At YZR Sweaters, inspection isn't an add-on: every order goes through our own full check before packing, and we welcome third-party PSI — SGS, BV, QIMA, whoever you prefer — at our partner factories. We'd rather a buyer's inspector finds nothing than a buyer's customer finds something.

Frequently asked questions