The book is offered as a textbook for higher education institutions, but it can also be used as a guide for solving practical problems related to management and project management. In order to better understand the material, exercises and examples are included using data that is as close to reality as possible. The 3rd edition includes new topics that have appeared in the relevant literature and the layout of the figures has been improved. Additionally, the material has been enriched with new examples that help better understand and consolidate the theory, questions have been added to each chapter, and new exercises. The new 4-color presentation of the material ensures the best representation of the figures, facilitating reading and understanding.