Quite a few people have asked me over the years why I, as an interaction designer, do not use some of all the sketching and prototyping software that is out there, and why I still draw by hand despite the availability of all of these really smart and practical tools. Here’s why:
When I sketch a first prototype of a piece of software for a customer, then despite having done my homework well exploring the customer’s wants, and researching the users’ needs, I usually never get it right the first time. Understanding a new domain of expertise is a process that takes time and effort, and I always learn new things about a domain when I present a first prototype sketch to the customer and/or the users. There were things they forgot to tell me the first time, things I did not fully grasp the importance of initially. These new pieces of information usually causes the interaction design to change, as it should. But….