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Modeling Critical Infrastructure Interdependency: The Case of the Mexico City Metro Transport System

2014; Taylor & Francis; Volume: 21; Issue: 5 Linguagem: Inglês

10.1080/10807039.2014.957956

1549-7860

Jaime Santos‐Reyes, Diego Padilla-Pérez, Alan N. Beard,

Supply Chain Resilience and Risk Management

"Critical infrastructures" are exceedingly complex and highly interconnected. In order to gain a full understanding and comprehensive awareness of the risks associated with critical infrastructures it becomes essential to consider in a coherent way all the aspects that may cause a failure of such systems. That is, there is a need for a systemic approach to interdependencies among critical infrastructures. The article presents the application of a systemic safety management system (SSMS) model to interdependency modeling for the case of the Mexico City Metro transport network. The model has highlighted that interdependencies occur vertically and horizontally. Horizontal interdependency occurs at every level of recursion and can be: operational, managerial, and environmental. Vertical interdependency, on the other hand, occurs between two levels of recursion only. The SSMS model has shown the potential to be used to model interdependencies among critical infrastructures. It is hoped that the approach presented may help to gain a better understanding of critical infrastructure interdependency.