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Static Network Reliability Estimation under the Marshall-Olkin Copula

Published: 13 January 2016 Publication History

Abstract

In a static network reliability model, one typically assumes that the failures of the components of the network are independent. This simplifying assumption makes it possible to estimate the network reliability efficiently via specialized Monte Carlo algorithms. Hence, a natural question to consider is whether this independence assumption can be relaxed while still attaining an elegant and tractable model that permits an efficient Monte Carlo algorithm for unreliability estimation. In this article, we provide one possible answer by considering a static network reliability model with dependent link failures, based on a Marshall-Olkin copula, which models the dependence via shocks that take down subsets of components at exponential times, and propose a collection of adapted versions of permutation Monte Carlo (PMC, a conditional Monte Carlo method), its refinement called the turnip method, and generalized splitting (GS) methods to estimate very small unreliabilities accurately under this model. The PMC and turnip estimators have bounded relative error when the network topology is fixed while the link failure probabilities converge to 0, whereas GS does not have this property. But when the size of the network (or the number of shocks) increases, PMC and turnip eventually fail, whereas GS works nicely (empirically) for very large networks, with over 5,000 shocks in our examples.

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      cover image ACM Transactions on Modeling and Computer Simulation
      ACM Transactions on Modeling and Computer Simulation  Volume 26, Issue 2
      January 2016
      152 pages
      ISSN:1049-3301
      EISSN:1558-1195
      DOI:10.1145/2875131
      Issue’s Table of Contents
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      Publication History

      Published: 13 January 2016
      Accepted: 01 May 2015
      Revised: 01 April 2015
      Received: 01 December 2014
      Published in TOMACS Volume 26, Issue 2

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      Author Tags

      1. Marshall-Olkin copula
      2. Static network reliability
      3. conditional Monte Carlo
      4. dependent components
      5. permutation Monte Carlo
      6. splitting
      7. turnip

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      • Australian Research Council
      • Canada Research Chair
      • Inria International Chair
      • EuroNF Network of Excellence
      • NSERC-Canada Discovery Grant
      • Faculty of Science Visiting Researcher Award at UNSW

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