This article explores the strategic management approach used by ASDA, a British supermarket retailer, to retain its market share and enhance profitability. It discusses the Pestle Analysis, SWOT Analysis, McKinsey 7S Model, and Lewin's Change Management Model. The Pestle Analysis examines the impact of political, economic, social, technological, environmental, and legal factors on ASDA's operations. The SWOT Analysis identifies ASDA's strengths, weaknesses, opportunities, and threats. The McKinsey 7S Model evaluates how ASDA manages different changes through its strategy, structure, systems, shared values, styles, staff, and skills. Lastly, the article discusses how ASDA can use Lewin's Change Management Model to inspire employees to accept and adapt to new changes.