OMG RAAML standard for model‐based Fault Tree Analysis

Abstract

AbstractFault tree analysis (FTA) is a top‐down method for identifying the discrete primary failure events that lead to system failures (top level events), and the means for determining the probability of the top‐level events if the probabilities of primary discrete failure events are known. Fault tree models document the logical combination of events that support fault tree analysis. This paper presents part of a forthcoming OMG standard “Risk Analysis Modeling Language” (RAAML) that defines a UML library and profile for fault tree modeling that can be used alongside the OMG Model‐Based Systems Engineering language, SysML. This enables fault trees to be co‐modeled with the system models with all the benefits of direct inter‐model linkage, versioning, and change‐impact analysis.