Our tourist (let’s Jack) is about to use audio guide web app for a first time, this app is going to be used only once and Jack wants to use it now. The point here is to minimise learning curve.
The easiest thing to do is make web app to work exactly this same as existing physical device.
So how physical device work – user enter 3 digit number based on the information presented in exhibition. By choosing this mechanism use don’t have to learn any new skills and can start using Guidly straight away.