[Purpose/significance] Since there existed the lack of quantitative research on weak signals of competitive intelligence in firms, this paper constructed a new method to identify weak signals quantitatively through Analytic Hierarchy Process (AHP) and Degree of Membership Function.[Method/process] Firstly, based on Potter's five forces model, seven forces model has been proposed, and the characteristics of weak signals were extracted combined with an empirical analysis. Then the index matrix is constructed based on the AHP, and the weight of each index are calculated. After that, this paper conducted the quantitative identification of weak signals via Degree of Membership Function.[Result/conclusion] The quantitative identification method of weak signals in firm competition was successfully established through AHP and Degree of Membership Function.
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