Liu, Y.; Hao, Y., and Lu, Y. 2018. Improved design of risk assessment model for PPP project under the development of marine architecture. In: Liu, Z.L. and Mi, C. (eds.), Advances in Sustainable Port and Ocean Engineering. Journal of Coastal Research, Special Issue No. 83, pp. 74–80. Coconut Creek (Florida), ISSN 0749-0208.

The current risk assessment model of marine architecture project is mainly processed by analyzing the risk factor of the PPP project, quantifying and sorting them, and achieving assessment through the sorting results. In the current model, the weight of risk decision cannot be calculated accurately, and the accuracy of risk assessment is low. To address this problem, a risk assessment model of PPP project under the development of marine architecture based on grey system theory is proposed in this paper. Some experts are invited to compare of PPP project risk index to establish risk discriminant matrix. The empirical value of expert weight is obtained by analytic hierarchy process. According to the empirical values given by the experts, the weight of the risk index is determined by the improved grey relational degree, and the project risk assessment model is built. Ex perimental results show that the improved model has a high accuracy of risk assessment and is more practical.