Porter's Five Forces: Competitive Strategy Model Explained

Introduction to Porter's Five Forces

Michael Porter first published his ideas on competitive forces in the Harvard Business Review in 1979. Since that time, his framework has become mainstream and a component of nearly every business curriculum available today. Porter has revisited and rewritten his article on competitive forces several times for the Harvard Business Review, providing updated content and new examples that demonstrate how his model continues to apply to the modern business environment.

The five forces Porter includes in his model are: (1) barriers to entry in the industry; (2) the bargaining power of suppliers; (3) the threat of substitute products; (4) the bargaining power of buyers; and (5) the level of rivalry among companies within any given industry. When these forces are intense, there is generally less room for profitability, and the structure of the industry itself can drive — or constrain — earnings. This review analyzes the model presented by Porter and offers insights into its value.

Barriers to Entry

The first force in Porter's model is barriers to entry — essentially, how easy or difficult it is to enter an industry based on factors such as the capital required and the number of competitors already present. When barriers to entry are high, profitability is generally more obtainable because fewer new competitors can challenge established players. However, when barriers are low, companies must keep their prices competitive, as a new firm can enter the market and accept a slightly lower profit margin in order to gain customers.

Companies like Microsoft and Apple illustrate the high-barrier end of the spectrum. Small firms find it extremely difficult to compete with these organizations, allowing them to charge premium prices for their products and services. The scale, brand recognition, and technological ecosystems these companies have built serve as formidable barriers that protect their market positions.

Bargaining Power of Suppliers

Another force is the bargaining power of suppliers. In any complex product or service, firms are dependent to some degree on their supply chains and raw material providers. When a company's suppliers hold significant power, they are more likely to retain a greater share of the value chain's profitability. For example, when only one supplier exists for a particular material or component, that supplier can charge a premium for whatever it is selling. When there is more competition among suppliers, however, market prices are driven down.

Microsoft is frequently cited in this context because of its virtual monopoly on operating systems, which gives it substantial supplier power. Firms that depend on Microsoft's software have limited alternatives, placing Microsoft in a strong negotiating position and allowing it to capture a significant portion of industry value.

Conclusion: Differentiation and Profitability

These two components — intensity of rivalry and how firms compete — must be considered together when determining the overall level of rivalry. When companies compete on factors other than price, there is a greater opportunity to profit. Apple is a well-known example of a company that has differentiated itself from competitors through quality and proprietary software, allowing it to charge a premium over rivals. Competing on dimensions beyond price has enabled Apple to become one of the most valuable companies in the world, even within an industry characterized by intense rivalry.