<p>This textbook shows how to develop the functional requirements of (information) systems. It emphasizes the importance to consider the complete development path of a functional requirement, i.e. not only the individual development steps but also their proper combination and their alignment.</p><p><br></p><p>The book consists of two parts: Part I presents the underlying theory while Part II contains various illustrative case studies. Part I starts with an introduction to the topic (Chapter 1). Then it explains how to develop functional requirements that represent the conceptual <i>dynamics</i> of an information system (Chapters 2 and 3). Chapters 4 and 5 explain how to model the conceptual <i>statics</i> of an information system. Chapter 6 gives some directions for implementation. Finally, Chapter 7 explains how a ¿technical manager¿ can organize and manage the development process. </p><p><br></p><p>As an illustration of the theory, Part II contains three substantial case studies