Abstract
Abstract: The aim of this paper is to propose and recommend a tool for contractors before the bidding stage to calculate the effect of delay in road construction projects by finding the relative importance index (RII) method. Through a rigorous literature search and interviews with road construction professionals, 95 delay causes were discovered and classified into 9 broad groups for this purpose. The relative importance index approach was used to calculate the relative relevance of delay factors and groups. The ranking of these factors and groups were illustrated in terms of their impact on delay. The factors and groups that are most and least responsible for the delays were explored.
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