Construction And Application Analysis Of Risk Assessment Model For PPP Infrastructure Project

In the process of national economic construction,infrastructure construction plays an important role.At present,our country vigorously carries out the PPP mode in the process of infrastructure construction,encountered a series of risk in the practice s,it is urgent to study the risk management of the project,which has important theoretical significance and practical value to promote the successful completion of PPP infrastructure projects.This paper analyzes the background and research status of PPP infrastructure project risk research of the domestic and foreign,and summarizes the problems in the process of the research on the PPP infrastructure project,such as the unclear understanding of the risk of the project,the imbalance of management and improper risk sharing;This paper expounds the basic connotation of the PPP financing mode,and the characteristics of the transformation of the government function,the risk of the government and the social capital sharing,and the improvement of the operational efficiency and service;This paper briefly introduces the open organization structure,operation procedure and contract relationship of PPP infrastructure projects,on the basis of discussing the basic process of PPP infrastructure project risk management and the characteristics of project risk,summarizes and puts forward some corresponding PPP infrastructure project risk measures,including risk prevention,risk avoidance,risk transfer and risk sharing;The grey evaluation model of PPP infrastructure project risk is constructed,optimal combination weighting method is used to determine the weights of evaluation indexes,taking into account the preference and the subjective and objective weighting method itself contains information optimization model is established by constructing Lagrange function extremum condition,get the final optimal weight;Describes the risk assessment of PPP infrastructure project process,including:construct evaluation index system,determine the weight of risk evaluation indicators,establish the evaluation index grade,determine the evaluation matrix,and determine the grey whitenization weight function,calculate the gray evaluation weight of grey comprehensive evaluation value is calculated according to the calculation results,the level of risk assessment.At present,the PPP model is applied more widely in water supply and drainage projects,and the targeted risk studies are relatively few.Combined with the PPP project of water supply and drainage in AA country,the risk evaluation index system is established to assess the risk of the project,the total project risk at a low state conclusion,according to the political,financial and other important risks,the government should be mainly responsible for the risk or making a commitment,in order to enhance private confidence;for the products and services of the price adjustment,seeking to provide third party guarantees and other risk measures.