In 1980, Michael Porter developed an approach to strategy formulation that proved to be extremely popular with both scholars and practitioners. The approach became known as the positioning school because of its emphasis on locating a defensible competitive position within an industry or sector. In this approach, strategy formulation consists of three key strands of thinking: analysis of the five forces to determine the sources of competitive advantage; the selection of one of three possible positions which leverage the advantage and the value chain to implement the strategy.[68] In this approach, the strategic choices involve decisions about whether to compete for a share of the total market or for a specific target group (competitive scope) and whether to compete on costs or product differences (competitive advantage). This type of thinking leads to three generic strategies:[69]

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