This report provides a comprehensive analysis of Sainsbury's strategic and leadership challenges. It begins by identifying the organization and outlining key strategic and cultural issues, including online strategies, profit growth, staffing, and corporate strategies. The report then explores the reasons behind initiating a change process, emphasizing the need for adjustments in response to competitive pressures and internal inefficiencies. It details key stages in the change process and examines challenges that threaten it. Theoretical and strategic models, such as Lewin's Change Management Model, Kotter's 8-Step Change Model, SWOT analysis, and the McKinsey 7-S model, are applied to diagnose the situation and propose strategic changes. The report also includes an evidence review using Porter's 5 Forces, Korey's Model, the Schendel and Hofer Model, Glueck's Model, Balanced Scorecard, Maslow's needs hierarchy, and Herzberg’s Two-Factor Theory to support the analysis and recommendations. The conclusion offers recommendations for improving Sainsbury's strategic and leadership performance.