As a theoretically demanding yet practice-oriented business management concept, controlling must prove itself in solving a variety of concrete tasks. The competence to tackle such tasks cannot be sufficiently acquired through the exclusive reading of textbooks. Rather, it requires additional practice, which this textbook aims to facilitate. Focused on a fundamental core of controlling theory, it addresses various problem areas that are also covered in the textbook "Controlling" by the same author. The issues to be addressed not only represent relevant paradigms of controlling theory but also provide a framework for practicing the management of typical practical tasks in controlling.