Do I need an inline inspection as well as a final one?

Short answer: A final inspection checks finished, packed goods and decides whether the lot is accepted, but it comes when most problems are expensive to fix. An inline, or during-production, inspection is carried out while sewing is underway, usually when a meaningful share of pieces has been sewn. Its purpose is to find systematic problems early, such as a measurement out of tolerance, a wrong elastic, a seam defect repeated on one machine, or a label error, while most of the order can still be corrected. Inline inspections usually check early production against the PP sample and specification, measure pieces across sizes, review workmanship on the line, and confirm materials and trims. The final inspection then checks the complete lot, typically drawing a sample under a plan such as ISO 2859-1, with AQLs agreed in the contract, and checking quantity, packing, labelling and workmanship. ISO 2859-1 also cautions that designating an AQL does not give the supplier the right knowingly to supply nonconforming items. For a new style, a new factory or a first order, an inline inspection is often worth adding, because a problem found at final inspection may mean rework, delay or a difficult decision on whether to accept. For repeat styles with a stable record, a final inspection alone may be enough.

Inline inspection

• During sewing, early in production.
• Checks against PP sample and spec.
• Finds systematic problems early.

Final inspection

• Finished, packed goods.
• Sample drawn under an agreed plan.
• Quantity, packing and labelling.
• Accept or reject decision.

When inline is most useful

• New style or new factory.
• First order or new fabric.
• Complex construction or prints.

A worked example

As an illustration, a brand could book an inline inspection when the first sizes are sewn, focusing on measurements and waistband attachment, then book the final inspection once the full order is packed.

Factory self-inspection

Many factories run their own inline checks. Ask what they check and request the records; buyer inspections then confirm results rather than replace factory quality control.

What to do with inline findings

Inline findings are useful only if they lead to action. Ask the factory to confirm the cause of each systematic problem, the correction made on the line and how pieces already sewn will be sorted or reworked. Then check those points again at final inspection.

Limits

No inspection finds every defect. Sampling inspection gives a level of confidence about the lot, not a guarantee for each piece.

Facts, recommendations and uncertainty

Established: inline inspection finds systematic problems while they can still be corrected, and final inspection decides acceptance of the finished lot. Recommendation: add inline for new styles, factories and first orders. Uncertain: how many defects remain in uninspected pieces.

Sources and further reading

• ISO 2859-1:2026 — Sampling procedures for inspection by attributes (AQL)

Standards and regulations are referenced by their published scope. Test parameters, cycles and pass levels should be agreed with your laboratory for the specific product; legal requirements should be confirmed for each destination market.