This assignment report provides a comprehensive analysis of leadership and management roles and functions within organizations, focusing on Toyota Plc and Amazon. The report defines the roles of leaders and managers, compares their characteristics, and explains how various leadership models apply in different situations, using examples from Toyota. It also assesses Amazon's operational management approaches, the roles of its leaders and managers in operations, the importance of operations management in achieving business objectives, and the factors within the business environment that impact Amazon's operational management and decision-making. Key topics include situational leadership, system leadership, Fiedler’s contingency leadership, and the strategic decisions related to Amazon's operations, such as product and service design, quality management, process and capacity design, and supply chain management.