“Create an event tree for a warehouse fire with fire detection alarms, sprinklers controlling the fire, and fire-service containment barriers, ending in minor damage, major damage, or total loss.”
図の背後にある意思決定を読み解く。
Start with a warehouse fire frequency.
Place detection, sprinklers and fire service in the order they affect escalation.
End paths once a failure makes later barriers irrelevant.
Use for an early consequence review of a fire-protection arrangement; calibrate probabilities with site data.
よくある質問
What does an event tree show?
It shows how the success or failure of ordered barriers changes the outcomes after an initiating event.
Where do probabilities go in an event tree?
Give the initiating event a frequency and each barrier its failure probability; the diagram computes the path frequencies.
Why are some branches pruned?
A branch is pruned when an earlier outcome ends the scenario, so later barriers no longer affect it.