The narrative of a use case unfolds when what event occurs?

The narrative of a use case unfolds when what event occurs?

• A. Any actor triggers a case
• B. The system restarts
• C. A primary actor invokes the use case
• D. A data record is updated

Answer: (C)

Use cases describe how a user achieves a goal with the system, and the narrative starts when the primary actor invokes the use case. That initiating action kicks off the sequence of steps the system and actors follow to reach the goal, including any alternate flows. Other events, like the system restarting or a data record being updated, occur as part of the flow, not as the triggering event. So the moment the primary actor invokes the use case is what begins the narrative.

Use cases describe how a user achieves a goal with the system, and the narrative starts when the primary actor invokes the use case. That initiating action kicks off the sequence of steps the system and actors follow to reach the goal, including any alternate flows. Other events, like the system restarting or a data record being updated, occur as part of the flow, not as the triggering event. So the moment the primary actor invokes the use case is what begins the narrative.