Formal Aspects of Computing

, Volume 29, Issue 4, pp 651–703 | Cite as

Fault trees on a diet: automated reduction by graph rewriting

  • Sebastian Junges
  • Dennis Guck
  • Joost-Pieter Katoen
  • Arend Rensink
  • Mariëlle Stoelinga
Original Article

Abstract

Fault trees are a popular industrial technique for reliability modelling and analysis. Their extension with common reliability patterns, such as spare management, functional dependencies, and sequencing—known as dynamic fault trees (DFTs)—has an adverse effect on scalability, prohibiting the analysis of complex, industrial cases. This paper presents a novel, fully automated reduction technique for DFTs. The key idea is to interpret DFTs as directed graphs and exploit graph rewriting to simplify them. We present a collection of rewrite rules, address their correctness, and give a simple heuristic to determine the order of rewriting. Experiments on a large set of benchmarks show substantial DFT simplifications, yielding state space reductions and timing gains of up to two orders of magnitude.

Keywords

Fault tree analysis Dynamic fault trees Reliability Graph rewriting 

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Copyright information

© British Computer Society 2017

Authors and Affiliations

  1. 1.Software Modeling and VerificationRWTH Aachen UniversityAachenGermany
  2. 2.Formal Methods and ToolsUniversity of TwenteEnschedeThe Netherlands

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