Seven criteria What makes a design fit for purpose depends—surprise!—on the purpose. But generic criteria are helpful for two reasons. First, they give you some basis for evaluation, however crude. Second, they can be used as a checklist to suggest more specific ones. A software product should be: Efficient: letting users accomplish their goals with no more steps or effort than needed; Flexible: supporting not just one fixed and narrow goal, but a range of goals that users are likely to h...
