In one line: How much money an industry can make depends on its structure: how fiercely rivals compete, and how much power entrants, buyers, suppliers and substitutes have to take value away.
Core idea
Michael Porter’s framework, first published in 1979 and restated in 2008 [1], asks why some industries are consistently more profitable than others. His answer is that average profitability doesn’t come from how fast an industry grows or how advanced its technology is. It comes from five pressures that decide who captures the value the industry creates. Strategy then means choosing a position where those pressures are weak, or acting to weaken them.
How it works
| Force | It is strong when… | An engineering-business example |
|---|---|---|
| Rivalry among existing competitors | many similar competitors, slow growth, high fixed costs, hard to exit | several contract manufacturers bidding on the same commodity boards |
| Threat of new entrants | low capital needs, no proprietary technology, easy access to customers | a new design house undercutting on price with off-the-shelf parts |
| Bargaining power of buyers | few large customers, standard products, low cost to switch | a single government agency buying a standardized system |
| Bargaining power of suppliers | few sources, unique inputs, high switching cost | a sole-source semiconductor foundry or specialty material |
| Threat of substitutes | another way to meet the same need at a better price-performance | software features replacing dedicated hardware |
Three cautions in applying it:
- Define the industry carefully. Draw it too broadly and the forces blur together. Draw it too narrowly and real substitutes get missed.
- Factors are not forces. Growth, technology, regulation and complementary products matter only through how they change the five forces.
- Look for the levers, not just a scorecard. The analysis is useful when it shows where to position, which shifts to exploit, or how to reshape the structure, for example by locking in suppliers or raising switching costs.
In practice
Engineers meet the five forces from inside their products. A design choice that uses a single-source part increases supplier power. Building on an open standard lowers barriers to entry for competitors, and for you. A proprietary interface raises buyers’ switching costs. Running the five-forces analysis on your own product line makes it clearer why management pushes some technical decisions and resists others.
Questions to ask yourself
- Which of the five forces most limits the profitability of my product line?
- Which of our technical decisions quietly strengthen a supplier’s or a buyer’s hand?
- What substitute, outside our industry as we define it, could meet our customers’ need more cheaply?
Connections
- Strategy built on it: Business Strategy, Five Questions for Strategy. One business, in one page: Business Model Canvas.
- How structure shifts over time: Clockspeed. Supplier power in operations: Supply Chain Management.
- Finding the evidence: Reading an Annual Report.
- Capabilities exercised: Vision, Inquiry, Decision Making.