Research on the risk evaluation of construction project based on fuzzy and grey correlation analysis model

According to the characteristics of construction project, the risk evaluation of complicated construction project is converted into the evaluation of four indexes including duration risk, cost risk, quality risk and safety risk. Establishing the fuzzy and grey correlation analysis model with the combination of the fuzzy theory and the grey correlation theory, fuzzing the judgment of specialists on natural state, economic state, technical state, management state and other state which have great effect on the construction project risk based on the triangular fuzzy theory, changing the fuzzy number into clear number, constructing comparative matrix and reference matrix based on the grey theory, it evaluates duration risk, cost risk, quality risk and safety risk separately, which provides the construction investors a scientific, direct, flexible and new method to evaluate the risk of construction project. Besides, an example of construction project is given to examine the risk evaluation method and the results verify the feasibility of it.