• Bob, driving down Main Street in his patrol car notices smoke coming out of a warehouse.
His partner, Alice, reports the emergency from her car.
• Alice enters the address of the building into her wearable computer, a brief description of its location (i.e., North West corner), and an emergency level.
• She confirms her input and waits for an acknowledgment.
• John, the dispatcher, is alerted to the emergency by a beep of his workstation. He reviews the information submitted by Alice and acknowledges the report. He allocates a fire unit and sends the estimated arrival time (ETA) to Alice.
• Alice received the acknowledgment and the ETA.
Bob, Alice: Field officer (Primary Actor)
– John: Dispatcher (Other stakeholder)