Research On The Coordination Optimization Of The Quality Cost Management Mechanism Of PPP Project Partners In The Two Stage

The PPP project partners are relatively independent economic entity,based on the assumption of rational economic man,each partner of the PPP project will pursue the maximization of their own interests within the scope of its decision,which is bound to harm the overall interests of the PPP project.This thesis mainly studies the PPP project partner in two stages,the private sector is not only the owner of the PPP projects,but also the contractor of undertaking the PPP project construction tasks(i.e.,the private sector in the construction process of the PPP project plays two actors of the owners and contractors).In such case,the two problems were analyzed and researched:Firstly,As the contractor is as one of PPP partners at the same time to undertake the project construction contract in the second stages of PPP construction projects,there is a moral risk of increasing their own construction gains while damaging other PPP partner’s benefit.The design of PPP project management mechanism under asymmetric information is studied basing on game theory and principal-agent theory,.The quality control decision model for owner,supervisor and contractor is established.Using the optimization principle,the optimal income distribution ratio,cost allocation ratio and the optimal quality control level of the partners are obtained in different management mechanism.And through Calculation and analysis by an example,PPP project management mechanism of conventional PPP mode and three PPP models of contractors participating in two-stage were compared and discussed.Secondly,As the contractor is as one of PPP partners at the same time to undertake the project construction contract in the two stages of PPP construction projects,When the private sector involved in two phases increases the moral hazard of construction cost for fraud.Based on the Shapely theory,through the four key factors that affect the cost of fraud,in considering the Shapely method of cost sharing is concluded that the revised Shapely cost sharing values,the result of cost sharing can better inhibit the private sector fraud cost opportunism and more reasonable to share of the PPP project cost.