Michael Eugene Porter (born 1947) is a professor at Harvard Business School. A leading authority on company strategy and the competitiveness of nations and regions, Michael Porter’s work is widely recognized across the globe.
"Porter's five forces" is a framework for the industry analysis and business strategy development developed by Michael E. Porter of Harvard Business School in 1979. It uses concepts developing Industrial Organization (IO) economics to derive five forces that determine the competitive intensity and therefore attractiveness of a market. Attractiveness in this context refers to the overall industry profitability.
Three of Porter's five forces refer to competition from external sources. The remainder are internal threats. It is useful to use Porter's five forces in conjunction with SWOT analysis.