Why Samples Come Back Wrong. And How to Get Them Right Sooner.

Samples come back wrong when the factory works from information that is incomplete, unclear or out of date. In most cases the supplier made what it was told to make; what it was told did not match what the brand meant. The fix is one current spec, measurable instructions and written feedback on every round.

Each wrong sample adds days or weeks to the calendar, so there is less time left for bulk. Most of the causes sit on your side of the courier, where you can fix them.

A sample is wrong when it does not match the approved spec closely enough to move to the next stage. Our guide to types of samples in fashion explains proto, fit, salesman, pre-production and top of production samples, and what each one checks.

The usual faults:

Not every fault is the supplier's. Before you send a sample back, check whether the spec actually said what you expected.

The spec was updated, but the change went out in a separate email or WhatsApp message. The pattern maker kept the attachment from the first send and never saw the update.

Put a version number and date on every send, record what changed, and keep one version everyone can see.

The tech pack named the main fabric, but not the lining, thread colour, care label or polybag. When a detail is missing, the factory fills the gap with whatever it normally uses.

Send a complete tech pack that lists every component, including the small ones.

"Navy", "a bit softer" and "slightly cropped" mean different things to different people. Without a tolerance (the amount a measurement can vary and still pass, for example plus or minus 1 cm on chest width), the factory cannot tell whether a measurement is acceptable, and you cannot fairly reject one.

Give measurements with tolerances, colour references and photos with markups instead of adjectives.

Comments were given on a video call, in a chat thread or as a voice note. Some reached the factory, some did not, and none were written back into the spec, so the next sample fixes half the problems and repeats the rest.

Write feedback on the spec itself after each round, then send one consolidated list.

Design, merchandising and quality each sent their own notes, and some contradicted each other. The supplier picked one, and the sample pleased nobody.

Name one approver per stage. Others can comment, but one person signs off and resolves conflicts before anything reaches the factory.

The specified fabric or trim was late or out of stock, so the factory used something close. Nobody flagged it, and the substitution only showed up when the sample arrived.

Ask suppliers to confirm they have the latest version and to flag any material change before they cut.

Compare the sample against the spec version the supplier had, not the one on your screen today. Then ask:

If the detail was missing or vague, it is a spec problem, and fixing your process will fix the sample. If it was present, clear and current, and the supplier still missed it, it is a quality problem to raise with the factory directly.

Imagine Sara, a product developer at an outerwear brand. Her fit sample arrives with the wrong zip and a long sleeve. For example:

It separates what the brand missed from what the factory missed.

For more on cutting the number of rounds, read how to reduce sampling rounds.

Spreadsheets, shared drives and messaging apps work for a handful of styles. As the range grows, versions multiply and comments scatter, so the causes above become one: the spec, the feedback and the approvals live in different places.

With a few styles and one supplier, the habits above matter more than any tool. Beyond that, PLM software for consumer brands puts the tech pack, materials list, comments and approvals on the product record itself. Think of it as the one file your team and your factory both read before anything is cut.

Polluxa PLM is product lifecycle management software for fashion, footwear, beauty, consumer goods and manufacturing brands.

When you want to see sampling on one of your own products, book a demo.

Usually the spec had no tolerances, the factory used an older measurement chart, or the base size was unclear. Send points of measure with tolerances and confirm which version the factory has.

It depends on the product. A simple style with a proven fit may be approved quickly; technical products need more rounds. If the same faults repeat, the cause is usually lost feedback, not complexity.

Check the spec first. If the detail was missing or unclear, the brand needs to fix the spec. If it was present, current and clear, the supplier should correct it, and repeated misses are a quality conversation.

Measured results against the spec, the tolerance each one failed, and a marked-up photo for every visual issue. Send one list per round, from one approver, and save it on the product.

Yes. A PLM system keeps one current spec per product, saves every version and records comments and approvals in one place. That removes the two most common causes of wrong samples: old files and lost feedback.