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event tree
Event tree is an inductive analytical diagram in which an event is analyzed using Boolean logic to examine a chronological series of subsequent events or consequences. For example, event tree analysis is a major component of nuclear reactor safety engineering.〔Wang, John '' et al.'' (2000). 〕
An event tree displays sequence progression, sequence end states and sequence-specific dependencies across time.〔IAEA, ( "Accident sequence modelling," p. 3. )〕
==Analytical tool==
Event tree analysis is a logical evaluative process which works by tracing forward in time or forwards through a causal chain to model risk. It does not require the premise of a known hazard.〔National Research Council. (2002). 〕 An event tree is an inductive investigatory process.〔
In contrast, the Fault tree analysis (FTA) evaluates risk by tracing backwards in time or backwards through a cause chain. The analysis takes as a premise a given hazard.〔National Research Council, 〕 FTA is a deductive investigatory process.〔Wang, 〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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