Start with the customer and the commercial decision
An adjacent product can look attractive because competitors offer it, yet still have no clear role in the brand's range. I start with the customer problem and the proposed item's relationship to the existing offer. We identify what it adds and what evidence would change the decision.
For an Irish team considering US sales, the range plan also needs a defined channel and stock boundary. We compare product options using the approved commercial assumptions and the resources needed to support them. This gives the team a practical sequence for research, improvement and any later inventory commitment.