Porter's five forces model
Michael E Porter's five forces of competitive position model
Michael Porter's famous Five Forces of Competitive Position model provides a simple perspective for assessing and analysing the competitive strength and position of a corporation or business organization.
Porter's first book Competitive Strategy (1980), which he wrote in his thirties, became an international best seller, and is considered by many to be a seminal and definitive work on corporate strategy. The book, which has been published in nineteen languages and re-printed approaching sixty times, changed the way business leaders thought and remains a guide of choice for strategic managers the world over.
Aside from his innovative thinking, Porter has a special ability to represent complex concepts in relatively easily accessible formats, notably his Five Forces model, in which market factors can be analysed so as to make a strategic assessment of the competitive position of a given supplier in a given market. The five forces that Porter suggests drive competition are:
PORTERS FIVE FORCES

New Market Entrants, eg:
• entry ease/barriers
• geographical factors
• incumbents resistance
• new entrant strategy
• routes to market
Buyer Power, eg:
• buyer choice
• buyers size/number
• change cost/frequency
• product/service importance
• volumes, JIT scheduling
Product and Technology Development, eg:
• alternatives price/quality
• market distribution changes
• fashion and trends
• legislative effects
Supplier Power, eg:
• brand reputation
• geographical coverage
• product/service level quality
• relationships with customers
• bidding processes/capabilities
Competitive Rivalry, eg:
• number and size of firms
• industry size and trends
• fixed v variable cost bases
• product/service ranges
• differentiation, strategy