《Table 1 A 9-point scale of re lative importance》

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《A Fuzzy Logic-Based Method for Risk Assessment of Bridges during Construction》

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How ever，most approaches of the existing AHP and FAHP methods to solve M CDM problems are based on a 9-point scale of relative importance betw een Ci（i-th criterion）and Cj（j-th criterion），w hich can be referred to in Table 1.Although these methods have been w idely used，the conventional AHP and FAHP methods have the follow ing disadvantages:1) fuzzy comparison matrices are hardly consistent in the course of risk identification by using the 9-point scale.Thus，pairw ise comparisons process is required to be repeated，w hich may consume a large amount of time；2) in practice，decision-makers usually find it extremely difficult to conduct exact pairw ise comparison judgments by using a 9-point scale.