Notes on the dimensions of prototype tests

Marc Rettig offers some things to think about when you're planning to test a prototype. These were scribbled during a project at HannaHodge because conversations about tests, both among the team and with clients, seemed to constantly mix levels or dimensions. Giving names to these dimensions seemed to help us talk sensibly about our choices, and transformed the discussion into an exercise in picking appropriate "settings" for each continuum of choices. Disclaimer: these categories are useful, but you may find other issues that are important for your particular project. Also, don't take the labels on the lines to be exhaustive--they describe stops along the way from one extreme to another. Again, there are many possibilities and common practices that are not mentioned explicitly in these notes.