Choosing a new software package begins with an analysis of the client's requirements. This helps shed light on the switchover criteria which are pivotal for the decision-makers. An understanding of these criteria forms the basis for pinpointing a suitable solution. In addition to the actual requirements, we also analyse the resulting costs, the medium-term viability and the organisational implications of this type of change. The final stage in the evaluation process is to plan the implementation project. This enables us to ensure continuity between selection and implementation in an integral approach.