This article looks at an analysis tool called the Porter’s Five Forces Analysis. In his book Competitive Strategy, Harvard professor Michael Porter describes five forces affecting the profitability of companies. These are the five forces he noted: 1) Intensity of rivalry amongst existing competitors 2) Threat of entry by new competitors 3) Pressure from substitute products 4) Bargaining power of buyers (customers) 5) Bargaining power of suppliers These five forces, taken together, give us insig.