Usability isn’t something you just can cook up in any one phase of design, but must be developed and refined throughout the entire process. It almost goes without saying, but you’re designing the product to be used by real people.Prototypes are built for experimentation, so it only makes sense to test them on real users.With that in mind, let’s look at how to keep usability in mind as you build the prototype, how to test usability before you have a prototype, and tips for testing with prototypes…