Software designers often lack an understanding of the effects of design decisions on quality properties of their software. This results in costly and time-consuming trial-and-error testing, delayed and complicated rollouts of the software. In this tool demonstration paper we present an integrated tool environment – the Palladio-Bench – for modeling and analyzing software architectures. The analysis results provided by Palladio support making design decisions by identifying the best-suited design from a set of given alternatives.