Michael Porter developed the Five Forces model for analyzing industry competition and profitability. The five competitive forces are: 1) rivalry among existing competitors, 2) threat of new entry, 3) threat of substitute products, 4) bargaining power of suppliers, and 5) bargaining power of buyers. The model helps evaluate an industry's attractiveness by examining the strength of each force and impact on profitability. Determinants that influence the competitive forces are also identified such as barriers to entry, supplier/buyer concentration, and product differentiation.