Integrating development of task and object models

The user interaction scenarios at the center of this integration process can be contrasted to the notion of scenarios used in other design methods. They are similar to instances of use-cases However, they are more elaborate than usecase instances because they narrate not only the interaction events but also the experience of the user(s)-the usage goals, expectations, and reactions that convey information about the system's usefulness and usability User interaction scenarios are also similar to the task descriptions developed and analyzed in cooperative design