[acjacobson]

Another thing to consider is the scope of the problem. While it may be true restaurants don't keep their menus up to date - you need to understand if that matters and how much. One way to assess this is to interview restaurant owners and ask them broad questions like "How do you keep your menus up to date?", "How much time does this take you?", "Who is responsible for doing this?", "Have you had an customer complaints due to inaccurate menus?", "Have problems with order items caused you to lose business? if so, how much?", "What solutions have you looked for already to solve this problem".

This last one is especially useful because if they never looked for a solution its a signal this isn't a real problem. There are millions of problems in the world and most of them are not worth solving because they don't actually matter that much. That's an important angle to think about.