Research On Risk Management Of A Construction Project Based On Integration Of Borda Order Value And Fuzzy 3D Risk Matrix

In 2020,due to the impact of the epidemic,the domestic construction market,which tends to be saturated,shows a flagging trend.After the long-term shutdown of construction projects,the occurrence frequency of risk problems is increasing,and the progress of affected projects is blocked or the degree of loss is deepening.How to improve the ability of construction projects to prevent risks has become a key issue.At present,the research on risk assessment of construction projects based on the perspective of construction party is insufficient in China.As the specific implementor of the construction project,the construction side needs to control the overall progress of the project and is responsible for the construction side.However,the construction project has the characteristics of long time limit and complex environment.Therefore,it is of great significance to study the overall risk management of construction projects from the perspective of the construction side.In this paper,the whole process risk assessment of construction project is studied by integrating fuzzy three-dimensional matrix with Borda sequence value.In the stage of risk identification,structured questionnaire and semi-structured interview are adopted to obtain the risk factor data based on construction projects.Then,based on the grounded theory,the risk list suitable for A construction project is analyzed through open coding,spindle coding,selective coding and other programs,and the index system is constructed.In the stage of risk assessment,based on the deficiency of the original two-dimensional risk matrix,the paper proposes an improved fuzzy three-dimensional matrix to quantify the risk index.Firstly,the relevant columns of the risk matrix are determined.Then,according to the expert group,all risks are assigned according to the three-dimensional attributes of risks,risk probability,influence and elimination degree,etc.,and the initial risk matrix combining the quantitative results of risks with the risk grade is obtained.Due to the objective factors such as coexistence of risks and large time span of construction period,the construction project has been built.Risk probability and other attributes are difficult to be directly quantified and screened,so this paper uses fuzzy set theory to process data.Then,according to the quantization level of the initial matrix,Borda ordinal value method is adopted to analyze the importance of existing risk nodes,determine the ordinal value of risks,and then obtain the importance ranking of risks,and finally determine the key risks that need to be controlled in Project A.Finally,AHP-entropy method is used to determine the weight,and the difference factor of entropy method is used to eliminate the weight error caused by the different emphasis of experts,so as to obtain the comprehensive risk level of the construction project.Combining with the actual project A in the study,relevant suggestions are put forward accordingly.The following conclusions can be drawn from the research:(1)Using the qualitative analysis method of grounded theory to build a theoretical system from the bottom up can comprehensively identify the risks in line with the current situation of the enterprise.(2)The comprehensive evaluation method combining Borda order value and fuzzy three-dimensional risk matrix can distinguish key risks from general risks scientifically and effectively.(3)Through comprehensive evaluation,the key risks of A construction project are successively: project safety risk outside the construction period,project duration change risk,construction fund management risk,etc.(4)The optimized system method can be applied to similar construction enterprises.