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Hybrid methodology and software platform for probabilistic risk assessment

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3 Author(s)
Groth, K. ; Center for Risk & Reliability, Univ. of Maryland, College Park, MD ; Dongfeng Zhu ; Mosleh, A.

This paper introduces the software implementation of a hybrid methodology for probabilistic risk assessment (PRA) of complex systems. The software, called IRIS (Integrated Risk Information System) combines a user-friendly graphical interface with a powerful computational engine. The framework includes a multi-layered modeling approach, combining Event Sequence Diagrams, Fault Trees, and Bayesian Belief Networks in a hybrid causal logic (HCL) model. This allows the most appropriate modeling techniques to be applied in the different domains of the system. At its core IRIS brings related perspectives of system safety, hazard analysis, and risk analysis into a unifying framework.

Published in:

Reliability and Maintainability Symposium, 2008. RAMS 2008. Annual

Date of Conference:

28-31 Jan. 2008