The Analytic Hierarchy Process (AHP) is a structured technique for dealing with complex decisions. Rather than prescribing a "correct" decision, the AHP helps decision-makers find one that best suits their goal and their understanding of the problem - it formalises a method for making decisions that people are already intuitively trying to apply mentally. This book introduces AHP, and a further development, which called Analytic Network Process (ANP). A case study is given to show how ANP can be applied, together with a short tutorial on a software tool, Superdecision, which can be used to implement the ANP.