The book provides practitioners and decision-makers in medium-sized enterprises with concrete guidance on the use of new information technologies and the optimization of operational processes through the implementation of the modern client-server software NAVISION-Financials®. Its relevance is particularly highlighted in light of the introduction of the Euro and the technical changes in the year 2000. The book offers a detailed introduction to NAVISION-Financials®. It explains, using a practical example, the reorganization and IT transition with PPS integration from NILS. The presentation of cost accounting, controlling, address marketing, and form design assists decision-makers, project leaders, and IT managers, as well as NAVISION® users, in acting independently and logically even in complex situations. The contributions come from practitioners and managers with many years of experience in dealing with companies.