The how and why of interactive Markov chains

  • Authors:
  • Holger Hermanns;Joost-Pieter Katoen

  • Affiliations:
  • Dependable Systems and Software, Universität des Saarlandes, Germany and INRIA Grenoble, Rhône-Alpes, France;MOVES Group, RWTH Aachen University, Germany and FMT Group, University of Twente, The Netherlands

  • Venue:
  • FMCO'09 Proceedings of the 8th international conference on Formal methods for components and objects
  • Year:
  • 2009

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Abstract

This paper reviews the model of interactive Markov chains (IMCs, for short), an extension of labelled transition systems with exponentially delayed transitions. We show that IMCs are closed under parallel composition and hiding, and show how IMCs can be compositionally aggregated prior to analysis by e.g., bisimulation minimisation or aggressive abstraction based on simulation pre-congruences. We survey some recent analysis techniques for IMCs, i.e., explaining how measures such as reachability probabilities can be obtained. Finally, we demonstrate that IMCs are a natural (and simple) semantic model for stochastic process algebras and generalised stochastic Petri nets and can be used for engineering formalisms such as AADL and dynamic fault trees.