
Summary: Getting to the bottom of your desirability criteria is more important than understanding usability. Since usability metrics are based on successful task completion, they come second after first clearly representing user tasks, needs, and goals. Desirability criteria should be defined first, then usability considered and tested next. Understanding desirability and what users truly want and need can differentiate a design, product, or value proposition fundamentally, with impacts on business results like conversion, engagement, and user adoption.