Influential factors can be decomposed by brainstormingor checklist techniques, scored by fuzzy reasoning membershipfunctions and weighed by analytic hierarchy process(AHP). The AHP is a popular decision making techniquethat has proven easy to understand and plausible for prioritizingalternatives among multi-criteria and multi-attributes[6–11]. The use of AHP need not involvetroublesome mathematics but decomposition, pair-wisecomparison and priority vector creation. However, onedrawback of the current AHP method is that it can onlydeal with definite scales in reality. Construction problemsare complicated usually involving massive uncertaintiesand subjectivities. Therefore, a modified AHP method isproposed to create favourable property on its applicationsfor construction risk analysis.
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