The tutorial is a concise, systematic presentation of the basic concepts that underlie the science of risk management. At an accessible level, the most important theoretical models and their application in the practice of risk management are analyzed. The main risk measures, risk assessment methods, decision-making criteria under conditions of uncertainty, risk management methods in decision-making in financial markets and in real business are considered. The peculiarity of the book is that it discusses in detail the methods for evaluating flexible decisions that have appeared in recent years (the real options approach).The manual is intended for undergraduate students studying management, but it will be useful and for other students studying economics and finance, as well as those financial practitioners who are seriously interested in the issues of risk assessment and management.