Limitation theory (TOS) gives the manager the opportunity to create simplified models of complex production and business systems that allow describing and controlling important events in the organization. Eli Schragenheim's book is devoted to practical aspects of the application of the theory of limitations. Each chapter describes a problem that any company can face: production, service, small business. Overcoming the problem always requires solving the dilemma, choosing the “best of two evils”, forced consent to some negative consequences. It seems that the ideal is unattainable . The approach of constraint theory 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 the goals and means, or simply incorrectly identified a limitation - a factor that prevents us from achieving the goal. At the end of each chapter, the author gives his own solution to the problem, which allows you to “kill two birds” and not to compromise. The book is intended for a wide range of readers interested in the practical aspects of management.