The specialized book "Collective Agreement of the Enterprise and Its Effectiveness" by Xeniya Chashhina examines the role of collective agreements in enhancing the efficiency of companies. The monograph provides a comprehensive analysis of the theoretical foundations of the effectiveness of collective contracts and develops a catalog of criteria that focuses on three main areas: compensation and labor relations, employee training and professional development, and the provision of social guarantees and benefits. Additionally, a methodology for assessing the interrelationships between the key performance indicators of a company and the criteria for fulfilling collective agreements is presented, with correlation and regression analytical approaches serving as a basis for decision-making to improve efficiency. This book is aimed at professionals and students who are engaged with aspects of corporate management and labor relations.