The event tree analysis (English Event Tree analysis) is an inductive procedure, which possible consequences of an arising error to determine is. It is described a kind of the systems analysis and as quality method in the DIN 25419.

Procedure

In the event tree analysis becomes an event, which can occur in a system, and whose possible effects for the overall system examines. The effect of the initial event is regarded afterwards under normal operating conditions and on the assumption that the subsequent component is incorrect. The result of the analysis is then represented graphically in a binary tree. This event tree is usually from right to left drawn, in each case with branchings for two alternatives. An upper branch for the successful behavior of the event and a lower branch for its failure. Thus it possible to go through different paths and identify an accident sequence. Each branch is connected thereby with a certain loss error probability, which together-multiplies the probability of the entire path as numerical value for each branch results in. One receives the probability of accident of the system then by combination of all probability of path of the paths, which lead to an accident.

Disadvantages

• Since the number of the branches with each step doubles itself, very large trees can develop in complex systems.
• The looked for probabilities can become usually only estimated, which to inaccuracies and errors in the computation of the probabilities of path can lead.

Employment

The event tree analysis can be used at the earliest meaningfully, if admits the system requirements are. It is above all used, in order to analyze existing systems.

Software

• http://www.enre.umd.edu/tools.htm overview - material and Nuclear engineering department - University OF Maryland

See also

• FTA, putrefies to Tree analysis (fault tree analysis)
• FMEA, failure mode and Effects analysis

Related links

• http://www.theoinf.tu-ilmenau.de/ISCRA/ereignisablaufanalyse.pdf http://www.theoinf.tu-ilmenau.de/ISCRA/ereignisablaufanalyse.pdf study to the topic of Stefan judge, Do-Ilmenau

Articles in category "Event tree analysis"

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Related Websites

We found here 4 related websites.

• Event Tree Analysis
  An event tree is a graphical representation of the logic model that identifies and quantifies the possible outcomes following an initiating event.


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