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Jonas Johansson

Jonas Johansson

Universitetslektor

Jonas Johansson

Component Importance for Multi-Commodity Networks: Application in the Swedish Railway

Författare

  • Mackenzie Whitman
  • Kash Barker
  • Jonas Johansson
  • Mohamad Darayi

Summary, in English

Preparedness and resilience planning for critical infrastructure networks requires evaluating the impact to the network when its components are disrupted. We extend the well-studied problem of component importance measures in single-commodity networks to multi-commodity networks by integrating a flow based multi-commodity optimization model with a multi-criteria decision analysis tool. A three-stage approach to assessing critical component importance with multicommodity impacts on network vulnerability of one-at-a-time component disruptions is proposed. We analyze commodity-specific impacts on network performance of the Swedish railway system to rank critical links with respect to the 20 different commodity types transported in the network. We conclude that the two proposed metrics to measure vulnerability, unmet demand and link usage over 90 %, give complementary information regarding the vulnerability of the network. It is further concluded that the approach supports exploration of how the lack of redundancy and capacity in the network can give rise to high levels of unmet demand or increased link usage for specific commodities that are transported in the network, although the overall robustness of the railway system towards single link failures is high.

Avdelning/ar

  • Avdelningen för Riskhantering och Samhällssäkerhet

Publiceringsår

2017

Språk

Engelska

Sidor

274-288

Publikation/Tidskrift/Serie

Computers & Industrial Engineering

Volym

112

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Other Social Sciences
  • Communication Systems

Nyckelord

  • Freight transportation
  • Vulnerability
  • Importance measure
  • Multi-commodity network flow
  • Railway

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0360-8352