Martin, J. Strategic groups are not to be confused with Porter's generic strategies which are internal strategies and do not reflect the diversity of strategic styles within an industry. Figure1 presents the diagram of the four strategic groups in the industry and Table 6 presents strategic activities of each group as indicators of their strategic dimensions.
Michael Porter developed the concept and applied it within his overall system of strategic analysis.
Harvard Business Review January-February : Group product differentiation. Ward's clustering method that is named Ward's minimum variance method seeks to minimize the sum of squared within-cluster distance Johnson and Wichern, In fact, it has a mediator role of position between considering the industry as a group and looking at the firms individually Alsamydai et al.
Related summaries: Christensen, C. Harvard Business Review November-December :, After mapping an industry, there are a number of additional steps that can enhance the analysis.
In addition, based on the mean scores of the responses for each tactic strategic activity and the mean scores of each group of tactics that present a distinctive competitive strategy, the difference and importance of the three competitive strategies in the current and the next five years were investigated.