A change is not automatically a problem. An unrecorded change is.
A supplier may suggest a material alternative, a different component, a carton revision, a new production date, a price adjustment, or a substitute process after you approve a sample. Sometimes the change is reasonable. A material may be unavailable, a component may have a longer lead time, or a packaging detail may need a practical adjustment.
The risk starts when the change is handled as a vague chat message. If one person believes the old sample is still the standard while another believes a new material has been accepted, the order can move forward with two different versions in people’s minds.
First identify what is actually changing
Ask the supplier to state the proposed change in a form that can be compared with the approved version. Avoid accepting “same quality” or “small adjustment” without identifying the affected point.
| Change area | Useful question | | --- | --- | | Material or component | What is changing, why, and how does the alternative differ in grade, source, colour, function, durability, or appearance? | | Dimension or construction | Which drawing, measurement, tool, mould, or assembly detail changes? | | Packaging | Does the change affect the selling box, label, insert, carton count, carton size, protection, or shipping mark? | | Price | Which item or assumption changed? Is the change per unit, per order, or related to quantity, tooling, freight, or packaging? | | Timing | What event moved the date? Does it affect sample review, production, inspection, cargo readiness, or shipment booking? | | Production method | Does the supplier propose a different factory, process, subcontractor, machine, or material source? |
A clear answer does not make the change safe or unsafe by itself. It gives the buyer something specific to evaluate.
Use a one-page change record
For each meaningful change, record five things: the approved baseline, the proposed new version, the supplier’s reason, the effect on price or timing, and the decision needed from the buyer. Add an owner and date for the next action.
For example: “Approved sample used black ABS housing, sample date 3 August. Supplier proposes black PC/ABS because the original grade is delayed. Supplier to send material sheet and revised sample. Buyer will compare appearance and function before production release. No production approval until written confirmation.”
This is not unnecessary bureaucracy. It protects both sides from relying on memory.
Decide whether a new sample is needed
A new sample can be useful when the change affects appearance, fit, material, function, safety-related characteristics, packaging, labels, or an important customer expectation. It may not be necessary for a minor change that has no effect on the agreed product, but that conclusion should still be recorded.
Do not let a supplier’s new photo silently replace the approved sample. Name the version, note what changed, and state whether the photo, revised sample, drawing, or other evidence is enough for your decision.
Connect the change to the order and quality plan
Once a change is approved, update the document that people will actually use: the purchase order, specification, packaging record, production brief, or inspection plan. Remove or mark superseded files so a factory team does not work from an older attachment.
If the change affects the product reference, revisit the [product samples guide](/en/product-samples/). If it changes a measurable requirement or packaging point, update the [quality-control plan](/en/quality-control-plan/). If it changes the supplier’s claim about capability, materials, or production location, return to [supplier verification](/en/supplier-verification/).
Do not confuse a written record with a guarantee
A change record cannot guarantee the final production outcome. It can make the next decision visible, show what evidence was reviewed, and reduce preventable disagreement about which version was approved. The commercial approval remains the buyer’s decision.