2. Build the fault tree
In hazard studies, the part of the bow-tie located upstream of the dreaded event is generally made up of a tree structure on which :
all causes and combinations of causes are represented;
prevention barriers are represented symbolically (by a vertical bar that opposes the accident sequence).
As a result, this tree structure does not strictly speaking correspond to a fault tree, since barrier failures are not explicitly represented. An example of a simplified representation is shown in the figure "Simplified fault tree for the dreaded event: Chlorine leakage during wagon unloading".
The Ultimate Scientific and Technical Reference
This article is included in
Environment manager
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Build the fault tree
Build the event tree
Bibliography
Also in our database
Bibliography
Yves Mortureux — Fault, cause and event trees — SE 4050
Yves Mortureux — Dependability: risk management methods — BM 5008
Olivier Iddir — The bow tie: a method for quantifying major risk — SE 4055
ToolWebsite
A benchmark player, the Institut pour la Maîtrise des risques-sûreté de fonctionnement-management-cindyniques is dedicated to helping companies adopt a preventive approach to risk.
The Ultimate Scientific and Technical Reference
