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Porter wrote in 1980 that strategy targets either cost leadership, differentiation, or focus. [1] These are known as Porter's three generic strategies and can be applied to any size or form of business. Porter claimed that a company must only choose one of the three or risk that the business would waste precious resources.
A graphical representation of Porter's five forces. Porter's Five Forces Framework is a method of analysing the competitive environment of a business. It draws from industrial organization (IO) economics to derive five forces that determine the competitive intensity and, therefore, the attractiveness (or lack thereof) of an industry in terms of its profitability.
Porter also wrote that strategy is an internally consistent configuration of activities that differentiates a firm from its rivals. A robust competitive position cumulates from many activities which should fit coherently together. [45] Porter wrote in 1985: "Competitive advantage cannot be understood by looking at a firm as a whole.
Porter is the author of 20 books and numerous articles including Competitive Strategy, Competitive Advantage, Competitive Advantage of Nations, and On Competition, and is the most cited author in business and economics.
[1] [2] 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. [3]
Porter's four corners model is a predictive tool designed by Michael Porter that helps in determining a competitor's course of action. Unlike other predictive models which predominantly rely on a firm's current strategy and capabilities to determine future strategy, Porter's model additionally calls for an understanding of what motivates the competitor.
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According to Porter, the appropriate level for constructing a value chain is the business unit within a business, [4] not a business division or the company as a whole. Porter is concerned that analysis at the higher company levels may hide certain sources of competitive advantage only visible at the business unit level. [5]