Purchasing must be involved from the very beginning in upcoming investment decisions! With this demand, Heinrich Orths begins his introduction to the overview of the role of procurement in successful investments. He examines the controlling function of purchasing throughout the entire investment process. In doing so, he clearly highlights the importance of purchasing as a controlling entity for the value creation process of investments. In the case of regular supplies, the early involvement of purchasing has long been a matter of course. Investments are often viewed differently. They are frequently misinterpreted as "one-time transactions," and the medium- and long-term consequences are underestimated. The book illustrates the opportunities that can be unlocked through early, intensive, and competent involvement of purchasing, as well as the requirements that arise from this.