This report explores the roles of leaders and managers in different situations in the context of management and operations. It discusses the definitions and differences between leaders and managers, the functions of managers in organizing, planning, coordinating, controlling, and directing, and the role of leaders in motivating employees. It also examines different theories and models of approach, such as situational leadership, system leadership, contingency approach, and theory of management. Additionally, it explores key approaches to operations management, including six sigma, total quality management, and just-in-time inventory.