The Advanced Planner and Optimiser (APO) is the software from SAP dedicated to supply chain management. This book addresses the question how to implement APO in a company. It is written from a long years' experience in implementation projects and aims to provide project managers and team members with the necessary know how for a successful implementation project. The focus of the book lies in introducing modelling approaches and explaining the structure and interdependencies of systems, modules and entities of APO. Another concern is the integration with the R/3 system(s), both technically and from a process point of view. Since APO projects differ significantly from other SAP projects, some key issues and common mistakes concerning project management are pointed out as well.