**3.2 Modeling interaction and dependencies, visualizing resilience**

SmartResilience and InfraStress projects look at interdependencies between infrastructures to understand how, in a case of a problem in one of them, the functionality of others can be impacted. The assessment is based on issues and indicators: these issues and indicators that are shared by different infrastructures indicate "lines of interconnectedness and interdependency". The infrastructures involved and the issues/indicators form thus the logical network that can analyze in order to model the propagation of influences from one infrastructure to another. Thus, the cascading and ripple effects can be modeled and the dynamic behavior of the network ("infrastructure-of-infrastructures") analyzed **Figure 10**).

The network in **Figure 10** is created as the case applied onto the indicators applicable to six types of infrastructures in SmartResilience project (health, ICT, energy, water, transportation, industry) and looking at the core, recommended and specific indicators (**Figure 6**). About 2,000 indicators were considered. The

#### **Figure 10.**

*Interdependencies among multiple infrastructures as a network: Common indicators define the interdependencies.*

#### *Resilience and Situational Awareness in Critical Infrastructure Protection… DOI: http://dx.doi.org/10.5772/intechopen.97810*

analysis has included the web-semantics-based analysis of the descriptions of indicators and the statistical analysis of the values of these indicators in the case studies performed in SmartResilience project. The analysis has also served as the basis for the,more user-oriented visualization of interdependencies in a critical infrastructure.
