Based on policy makers' limitations in solving real-life problems and the
fact that information is rarely available in a pure quantitative form, enhancements and new approaches to remedy this are proposed by Mark Hurlimann. He introduces simple and more sophisticated static and dynamic methods to analyze complex topics. In addition a semi-quantitative approach is presented that integrates quantitative and qualitative variables in a feedback system. The author, finally, illustrates on the basis of a case study the advantages and limitations of the various approaches in a didactically sound...