The monograph explores the nature, causes, patterns, conditions, and mechanisms for implementing changes in organizations as socio-economic systems. It covers the theoretical foundations necessary for professional and effective management of organizational changes: objective patterns of change in organizations that appear during their development; the main objects and subjects of change; the importance of the organizational context that influences the selection of change management strategies and the way change unfolds; options and sequences for implementing managed changes within an organization; various change management techniques; approaches to selecting strategies for change implementation and the strategies themselves; key obstacles to executing changes; effective methods and techniques for overcoming resistance to change; stages of business process reengineering; and the basics of implementing quality systems in companies. It highlights the specific features of change implementation practice. The monograph is intended for students pursuing a degree in "Management".