The Grand Strategy Matrix, created by Osama Rahman, is a strategic management tool that positions companies in four quadrants based on competitive position and market growth to guide strategy formulation. Each quadrant suggests specific strategies: firms in Quadrant I should focus on growth, those in Quadrant II must evaluate and improve competitiveness, businesses in Quadrant III need significant operational changes, and companies in Quadrant IV should consider diversification. While the matrix is user-friendly and versatile, it has limitations such as providing options without clear success criteria and its simplicity potentially lacking nuance.