This essay provides a comprehensive discussion of three key strategy development tools: SWOT analysis, PESTLE model, and Porter's Five Forces. It begins with an introduction to strategy development tools and their importance in achieving long-term organizational goals, emphasizing their role in assessing uncertainties and analyzing market situations. The essay then applies these tools to Coles supermarket, a major Australian retailer. The PESTLE analysis examines the external macro-environmental factors impacting Coles, including political, economic, social, technological, legal, and environmental factors. The SWOT analysis assesses Coles' internal strengths and weaknesses, along with external opportunities and threats. Finally, the Porter's Five Forces framework evaluates the competitive forces within the industry, including the bargaining power of suppliers and buyers, the threat of new entrants and substitutes, and industry rivalry. The essay concludes by summarizing how these tools can provide Coles with a competitive edge and help it navigate the dynamic business environment.