Activity-Centered Design (ACD) focuses on the activity context in which individuals interact with your product. Instead of analyzing specific goals and tasks, ACD focuses on the analysis of meaningful, goal-directed actions supported by tools and artifacts in a social world
In my experience, the range of parameters devised is fairly large and it is easy to get lost in selecting configurations or even anticipating how well they will fit user needs. Still, these tactics seem important for practitioners to apply when appropriate. The challenges strike me as fundamental, given the range of needs and potential interface designs.
Les boutons de validation en voie de disparition ?![ Usaddict: Ressources sur l’ergonomie des interfaces (le blog Usabilis)]by Monique & 1 other
Sur l'impulsion du Web riche et du mobile (téléphones et tablettes) on voit disparaître des boutons permettant de confirmer une action….
This means the user does not have to think about the device he is using, changes in the environment, or changes in context, and can rely on great functionality and ease of use independent of his situation.