This textbook includes the most important methods and tools for managers and consultants. The author does not restrict himself to describing the scientific methods but also shows how to apply them to real-life situations. The management tools he introduces have been successfully tested during 20 years of experience. The various methods are described and analyzed in detail, and many examples illustrate their application. Thus, the textbook gives a fundamental and comprehensive insight into the practice of successful management. It is clearly structured and provides essential in-depth knowledge for students as well as for managers and consultants.