Use Case Diagram Template - Colorado
Use Case Template A. Cockburn
Page -5- Humans and Technology HaT TR96.03a (98.10.26)
Use Case:
Smoke detection
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CHARACTERISTIC INFORMATION
Goal in Context: To inform stakeholders of the fire in the house.
Scope: Alarm system.
Level: Primary task
Preconditions: Alarm system is armed and active. Detector is working. Communication means are
functioning.
Success End Condition: Stakeholder is informed.
Failed End Condition: Stakeholder are not informed of smoke. Fire destroys monitored property.
Primary Actor:
Smoke detector.
Trigger: Detection of smoke.
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MAIN SUCCESS SCENARIO
<put here the steps of the scenario from trigger to goal delivery, and any cleanup after>
1. One of the smoke detector signals smoke presence.
2. System identifies smoke detector location by its comm. port.
3.
System informs stakeholders via phone line and the a/v speaker.
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RELATED INFORMATION (optional)
Priority: Top priority.
Performance Target: Stakeholders should be notified within 5 seconds.
Frequency: Rarely. Only in extreme cases of fire, or strong smoke concentration.
Subordinate Use Cases:
Notify Stakeholders
Channel to primary actor: Simplex, one way, Electric wire.
Secondary Actors: Stakeholders – Authorities and Owners
Channel to Secondary Actors: Phone line, Speaker
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OPEN ISSUES (optional)
1. How the system will recognize that someone is cooking food that generates smoke.
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SCHEDULE
Due Date: Version 1.0 release.
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