Study On The Externality Of Outcome Documents Of Project Cost With Bills Of Quantities

The outcome documents of project cost are important information sources of construction market.As the main line of price formation,they relate to the interest relationship between subjects.Therefore,any changes in the content means alters of the interests of related subjects.However,in the process of its marketing application,due to the subjective and objective factors,the outcome documents of project cost are often uncertain in engineering practice.This result caused by the defect leads to the overflowing of cost or benefit,which could not be effectively resolved by market mechanism.So,the externality of outcome documents of project cost comes into being.especially the negative externality.For this reason,combined with the environment of Bills Of Quantities,as well as engineering laws,engineering practice,engineering contracts and related norms,aiming to balance the rules of cost,contractual,and the law,and the interests of related subjects as well,this paper explores the legal way for the external consequences,taking the outcome documents as the research object,the external theory as theoretical analysis tools and the correction of interests as logical starting point.First of all,the scope of the outcome documents,and its composition in detail are defined.In addition,the flow chart of outcome documents of project cost system with Bills Of Quantities is structured from the time dimension.Secondly,according to the practice characteristics and combined with the external theory,connotation of the externality of outcome documents of project cost is explained.Based on the impact effect,the external effects are divided into the positive externality and the negative externality.Specifically,the positive externality is analyzed at macro level.the negative externality is analyzed at micro level.Then,from the professional dimension,the negative externality causal analysis diagram or emergence mechanism of interest conflicts between them are built by means of the integration of each building professional.Finally,taking the negative externality as emphasis,adopting the external theory and mechanism design theory,the paper establishes externality theoretical analysis framework of the outcome documents of project cost,combined with engineering laws,engineering practice,engineering contracts and related norms,from the perspective of legal overcoming and prevention mechanism design.