•Scenarios: “sequences of actions aimed at accomplishing some task goal”
•Goals: “partially specified states that the user considers as desirable”
•“Use cases: “particular cases of how the system is to be used” (classes of scenarios)
•Functions: “effects achieved by some entity”
•Tasks: “pieces of work that a person or other agent has to (or wishes to) perform”
Replaced/Superseded by document(s)
Goal: Improve practice of system development regarding requirements engineering and interaction design.