Article | REF: RE451 V1

Satellite Constellation End-of-Life Dependability Assessment with AltaRica 3.0

Authors: Benoît SAINT-GEORGES, David MAILLAND

Publication date: March 10, 2023

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2. Model-Based Safety Assessment (MBSA) approach

The aim of the MBSA method is to combine the advantages of traditional reliability analyses (fault trees, event trees, Markov processes). This method is based on a powerful mathematical concept: guarded transition systems, originally introduced by Rauzy in 2008 in . This new field brings together both combinatorial models (fault trees, block diagrams) and the state/event formalism used in Markov processes and Petri nets. The mathematical fundamentals are mainly based on Markov processes and Petri nets. AltaRica is based on this formalism.

The MBSA approach is now well documented, and many details can be found in...

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Model-Based Safety Assessment (MBSA) approach