A Brief Overview of Some Methods and Approaches for Investigating Interdependencies in Critical Infrastructures

Vulnerability analysis of complementary transportation systems with applications to railway and airline systems in China

“…The economic theory based approaches regard each infrastructure system as an entity in a market of economy and then model their interdependencies by economic models, such as input-output models and computable general equilibrium models, which enable to analytically study how perturbations propagate among interconnected infrastructures and how to implement effective mitigation efforts [33][34][35][36][37]. The network based approaches model each involved system by a network and describe their interdependencies by interlinks, which enable to describe the topological features of interdependent systems and flow characteristics upon systems, identify the critical system components and provide suggestions on mitigation strategies at detailed topological levels [38][39][40][41][42][43][44]. However, these studies mainly considered negative effects of interdependencies, where failures in one system can propagate to other systems and aggravate the initial damage.…”