Software Modeling and Verification Groups, Department of Computer Science, RWTH Aachen University presents the proceedings of the Eighth International Conference on the Quantitative Evaluation of Systems held on the 5-8 of September, 2011 at Aachen, Germany. The conference provides discussion on computer-communication systems. This volume is intended for researchers and practitioners utilizing computer-communication systems. Annotation ©2011 Book News, Inc., Portland, OR (booknews.com)