Title: Components' IMportance Measures for Initiating and Enabling events in Fault Tree Analysis
Publisher: Publications Office of the European Union
Publication Year: 2010
JRC N°: JRC58492
ISBN: 978-92-79-15799-8
ISSN: 1018-5593
Other Identifiers: EUR 24373 EN
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC58492
DOI: 10.2788/93758
Type: EUR - Scientific and Technical Research Reports
Abstract: This report deals with the problem of determining the exact values of the importance indexes of basic events in case of both unavailability and frequency analysis of coherent and non-coherent fault trees. In particular a new method is described for determining the importance of enabling events in case of frequency analysis. Insights are given into the importance analysis implemented in the new software ASTRA 3.0 based on the Binary Decision Diagram approach with Labelled variables (LBDD). The analysis methods are also described with reference to modularised fault trees. Simple numerical examples are provided to clarify how the methods work. Proofs of the implemented equations are provided in Appendixes.
JRC Directorate:Space, Security and Migration

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