Ask most credit union executives who they serve and you often get a territory. We serve the state. We serve these eleven counties. Those are accurate statements about eligibility, and eligibility is not the same thing as a target.
Pick a community and a footprint. This sizes it, using published participation data, and shows what capturing a share of it would actually be worth.
Members can tell the difference immediately. Once you can name who you are for, the product design gets much easier, because the constraints do the work for you.
Design the first product in the Concept Studio →The arithmetic here is yours to use, and Product Brief No. 2 walks through the full framework.
If it is useful, or you want to argue with it, LinkedIn is the best way to reach me.