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The Six Forces Model is an analysis model used to give a holistic assessment of any given industry and identify the structural underlining drivers of profitability and competition.〔(【引用サイトリンク】url=http://www.youtube.com/watch?v=mYF2_FBCvXw )〕〔(【引用サイトリンク】url=http://www.entrepreneurial-insights.com/porters-five-forces-model-strategy-framework/ )〕 The model is an extension of the Porter's Five Forces model proposed by Michael Porter in his 1979 article published in the Harvard Business Review "How Competitive Forces Shape Strategy." The sixth force was proposed in the mid 1990s.〔(【引用サイトリンク】url=http://www.investopedia.com/terms/s/six-forces-model.asp )〕 The model provides a framework of six key forces that that should be considered when defining corporate strategy to determine the overall attractiveness of an industry. The forces are: * Competition - assessment of the direct competitors in a given market * New Entrants - assessment in the potential competitors and barriers to entry in a given market * End Users/ Buyers - assessment regarding the bargaining power of buyers that includes considering the cost of switching * Suppliers - assessment regarding the bargaining power of suppliers * Substitutes - assessment regarding the availability of alternatives * Complementary Products - assessment of the impact of related products and services within a given market Although there are a number of factors that can impact profitability in the short term - weather, the business cycle - an assessment of the competitive forces in a given market provides a framework for anticipating and influencing competitiveness and profitability in the medium and long term.〔(【引用サイトリンク】url=http://hbr.org/2008/01/the-five-competitive-forces-that-shape-strategy/ar/1 )〕 ==History== The model is an extension of Porter's Five Forces model (1979). The extended model including the sixth force, Complementary Products and was proposed in the 1990s.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Six forces model」の詳細全文を読む スポンサード リンク
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