The book is a compact guide to the step-by-step development of demand planning for construction tasks. Large projects are rightly criticized by the public due to budget and deadline overruns. However, they are only the tip of the iceberg. Even less spectacular projects often fail to meet their goals. They frequently become more expensive, are completed later, and do not achieve the expected quality. Experts agree that the critical mistakes are made in the initial phase of a project, specifically in the development and coordination of qualitative and quantitative requirements. The reform commission for large construction projects convened by the Federal Ministry of Transport and Digital Infrastructure also emphasizes the importance of the initial steps in a construction project.