The implementation of complex ERP systems (Enterprise Resource Planning) poses a challenge for management and project leaders. This recipe book not only assists in selecting a suitable standard system but also sharpens awareness for targeted project planning and execution, as well as intensifying the management function of "organizing" (business process optimization). The introduction of ERP systems, which affects the entire company, brings about the most significant changes for employees. For this reason, this book consistently emphasizes the understanding that people are the number one success factor in ERP projects in two ways: first, project leaders act with a focus on appreciative communication, and second, this is reflected in all phases of the project.