Customers call to order custom cakes; orders get lost on sticky notes and double-booked on busy weekends. The bakery wants a simple way for customers to request and pay for orders online, and one place to see the week's orders.
Example project here. For an unclear idea, the build plan comes first: the real problem, the smallest useful build, exactly what's included and not, milestones, and a fixed price, so you never pay to build the wrong thing.