1. Methods for Interdependency Modeling of Critical Infrastructures
Bachelor Thesis
for the graduate examination for the
Bachelor of Engineering
in the degree program TIT11
at the DHBW Ravensburg
Campus Friedrichshafen
by
Thomas Bringewald
19.09.2014
Processing time: 01.07. – 19.09.2014
Matriculation number: 3925777
Partner company: Airbus Defence and Space
Landshuterstr. 26
85716 Unterschleißheim
Supervisor in the partner company: Helmut Kaufmann
Supervisor in the DHBW Ravensburg: Prof. Erwin Fahr

2. Abstract
Critical infrastructures provide the fundamentals of society. Their security is
essential for an effective operation of the economy and public services. But those
critical infrastructures are highly interconnected increasing the difficulty to secure
them. The ECOSSIAN program aims to improve the security of critical
infrastructures by implementing an early warning system.
This paper will survey different approaches, like agent-based or system-dynamic-
based, used to model critical infrastructures and their interdependencies.
Frameworks implementing the approaches are presented. Based on criteria
resulting from ECOSSIAN the frameworks will be comparetive evaluated and
ranked based on their applience in the ECOSSIAN program. Following this is a
recommendation whether the frameworks qualify for the assignment and which
framework could be applied. An approach based on agent-based and system-of-
system modeling is proposed at the end of this paper. Following the propose
further research topics to improve interdependency modeling for critical
infrastructure will be pointed out.