A book for companies facing the decision: to outsource or not. What are the reasons that lead more and more companies to outsource their IT systems to an independent service provider? The authors also address the following questions: What are the advantages and disadvantages of outsourcing, and what risks does it entail? How does the outsourcing process unfold? What points must be considered during implementation - from the initial contact, the development of a proposal, contract creation, to technical planning and implementation? A book that answers all these questions concisely and therefore fully deserves the title "practical guide.".