What changes should a factory notify before production?

Short answer: A change notification rule tells the factory which changes must be reported and approved before production starts. The aim is not to stop all changes, but to make sure the buyer can check the effect on quality, fit and compliance. Changes that usually need notification include fabric supplier, fibre blend, yarn, fabric weight, dyes or finishes, elastic and trims, print methods and inks, labels and packaging, and moving production to another factory or subcontractor. Process changes can also matter, such as new washing methods or different sewing equipment. Compliance is one reason. US CPSC guidance describes a material change as a change in the product's design, manufacturing process or source of component parts that a manufacturer believes could affect its ability to comply with the applicable rules. For general-use products it recommends retesting when there is a material change, and for children's products a material change requires new third-party testing and a new Children's Product Certificate. Even when no rule applies, changes can affect hand feel, shrinkage, colour and durability, so the buyer should decide whether a new sample, test or inspection is needed. A simple rule is: list the changes that need notice, require written notice before the change, ask for a sample or test results where relevant, and only approve the change in writing.

Changes that need notice

• Fabric, yarn or blend.
• Dyes, finishes and prints.
• Elastic, trims, labels and packaging.
• Factory or subcontractor.
• Key process changes.

What the buyer may ask for

• New sample for approval.
• Test results for affected properties.
• Inspection focused on the change.

A worked example

As an illustration, a brand could add a clause to its purchase order listing changes that need written approval and asking for a new sample for any change to fabric, elastic or factory.

Making it practical

Keep the list short and focused on changes that affect quality or compliance, so the factory can follow it without delay.

Unplanned changes

Sometimes changes are urgent, for example when a supplier runs out of a trim. Agree a quick approval route for these cases, such as photos and a sample sent by courier, so the factory does not feel forced to change without telling you.

Limits

Some changes are hard to detect at inspection. A clear rule and a good relationship are often the best protection.

Facts, recommendations and uncertainty

Established: CPSC guidance treats changes in design, process or component source that could affect compliance as material changes, with retesting recommended for general-use products and required for children's products. Recommendation: set a written change notification rule. Uncertain: whether small changes affect product performance until tested.

Sources and further reading

• U.S. CPSC — General Certificate of Conformity (GCC) FAQ
• U.S. CPSC — Periodic Testing FAQ (children's products, 16 CFR 1107.21)

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.