Agile working methods such as Scrum have revolutionized development processes and our understanding of leadership in the software industry. The companies that have already completed this paradigm shift are putting the pressure on. They are developing their products faster because they can rely on new management models and work closely together with customers and suppliers. Scrum & Co. are now also finding their way into the development of physical products. However, many managers continue to ask themselves how short development cycles in software can be transferred to long-running products such as electronics and mechanics. This is exactly how I support companies every day - we make their development processes leaner and more agile. The basis for this is a deep and uniform understanding of the most widespread approaches: Scrum and Kanban, as well as Lean Development concepts. This book summarizes the knowledge that I impart in my basic training courses. It is intended to serve as a reference document, and accompany you as you take your first agile steps.