This assignment explores the crucial roles of leaders and managers in the operations function of a business organization. It examines the key approaches to operations management, including Total Quality Management (TQM), Just-in-Time (JIT), and Lean Production, and analyzes the impact of internal and external factors on operational management and decision-making. Using Marks & Spencer as a case study, the assignment delves into the relationship between leadership and management in a contemporary business environment, highlighting the importance of leadership styles, such as directive, supportive, participative, and achievement-oriented, in achieving business objectives.