The Theory of Constraints (TOC) gives a manager the opportunity to create simplified models of complex production and business systems that allow them to describe and control important events in the organization. Eli Schragenheim's book is devoted to the practical aspects of applying the theory of constraints. Each chapter describes a problem that any company may encounter: manufacturing, service, small business. Overcoming a problem always requires resolving a dilemma, choosing the “better of two evils,” and forced consent to some negative consequences. The ideal seems unattainable. The theory of constraints approach is based on a different logic, according to which compromise is always bad. The need to choose between two options, each of which has negative consequences, means that in the course of reasoning we made a mistake: we did not clearly understand the goal, confused goals and means, or simply incorrectly identified the limitation - the factor preventing us from achieving the goal. At the end of each chapter, the author gives his solution to the problem, which allows you to “kill two birds with one stone” and not compromise. The book is intended for a wide range of readers interested in practical aspects of management.