Research On Cost Control Optimization Of PD High Speed Project General Contracting Project

As China’s economy enters a high-quality development stage,the engineering field is also facing a lot of opportunities and challenges.The EPC mode has gradually revealed its advantages and been promoted in the industry.However,the rapid development of any mode in a short period of time will be accompanied by certain limitations.In the past,the domestic engineering industry has not formed an effective cost control system,so that there are many phenomena that the cost of the project increases in the construction process and then leads to the loss of the enterprise.As the top priority of EPC,cost control is the foundation to ensure the vigorous development of enterprises.Based on this,this paper takes the PD high-speed EPC project as an example to study the cost influencing factors and cost control model:(1)By consulting relevant literature,this paper summarizes the current situation of EPC project cost control,expounds the current commonly used theories and methods,points out the shortcomings of traditional methods.And puts forward the innovation of this paper,that is,to establish the evaluation system of cost influencing factors and the optimization model of cost control.(2)Relying on PD high-speed EPC general contract project as the research object,this paper establishes a hierarchical analysis structure for cost influencing factors in the process of project implementation by means of expert questionnaire.Weights of influencing factors are obtained by calculating expert scoring results.Then,the fuzzy clustering method is introduced,in which the fuzzy similar matrix is established by the commonly used maximum and minimum method,and the fuzzy equivalent matrix is calculated by means of transfer closure after programming with MATLAB.Finally,the optimal threshold is selected to classify the influencing factors,and the comprehensive weight values and ranking of each cost influencing factor are calculated.(3)In the process of constructing the duration cost quality comprehensive optimization model,assuming that the construction duration,construction cost and project quality of the project are quadratic functions,the relationship between them is derived.The duration model under quality and cost constraints,the cost model under duration and quality constraints,and the quality model under duration and cost constraints are studied respectively,Based on the PD high-speed EPC project,the specific application of the model is carried out,and the corresponding cost control optimization scheme is given.In view of the above research methods and theories,and in combination with specific engineering cases,this paper proposes,establishes and verifies the cost impact factor evaluation system and cost control optimization model under the EPC mode,in order to provide new cost control and cost control methods for EPC projects and provide reference for EPC enterprises.