This book describes and demonstrates how SAP APO - can be used to tackle real optimization problems arising in industry. In a unique combination it deals with the aspects of model-building as well as with the implementation in commercial supply chain management software, SAP APO - being a typical example of an advanced planning system (APS).The authors address people involved in projects in which SAP and, particularly, SAP APO - are implemented in companies. These are the project designers, projects leaders, the IT personnel inside the companies, but also operations research practitioners, supply chain management consultants and decision makers in the area of tool selection for optimization. Graduates in the economic sciences, business and operations research, but also mathematicians and physicists with interest in solving real optimization problems might benefit from reading this book.