This book contains a selection of refereed papers presented at the
"International Conference on Operations Research (OR 2011)" which took
place at the University of Zurich from August 30 to September 2, 2011.
The conference was jointly organized by the German speaking OR societies
from Austria (ÖGOR), Germany (GOR) and Switzerland (SVOR) under the
patronage of SVOR. More than 840 scientists and students from over 50
countries attended OR 2011 and presented 620 papers in 16 parallel
topical streams, as well as special award sessions. The conference was
designed according to the understanding of Operations Research as an
interdisciplinary science focusing on modeling complex socio-technical
systems to gain insight into behavior under interventions by decision
makers. Dealing with "organized complexity" lies in the core of OR and
designing useful support systems to master the challenge of system
management in complex environment is the ultimate goal of our
professional societies. To this end, algorithmic techniques and system
modeling are two fundamental competences which are also well-balanced in
these proceedings.