Construction projects always have characteristics as follows, long construction period, a large amount of investment and complex construction technology, which determines a large number of construction project risk factors during the construction. So the proper risk management of the construction project is significant, that maybe effectively prevent the occurrence of construction projects in the period of risk, thereby ensuring the smooth progress of construction projects. Risk management of construction projects including Venture Capital Firms, Venture capital, Risk Evaluation, Risk Prevention and Control.
       This article based on the risk management of a large number of domestic and international literature review on the construction project, making comprehensive analysis and research. While research period of risk for a more systematic construction project, the article analyze and compare Venture Capital Firms, Venture capital, Risk Evaluation, Risk Prevention and Control methods combined with the ambiguity and uncertainty of construction project information. At the same times mastering targeted to select evaluation , analysis of the analytic hierarchy process and fuzzy comprehensive evaluation method to establish evaluation model for building construction projects on Risk quantitative. Then through the research case studies of YGHY construction project to reflect the applicability of such a risk evaluation index system, and finally take control strategies and control measures targeted to each risk factor based on the results of the evaluation.
        Case studies show that the risk management of construction project construction period is estimated to affect the probability and consequences of various risk factors by identifying construction project construction period to be faced and the various risk factors. And then using the relevant risk analysis and evaluation methods for comprehensive evaluation of the project, and finally find to develop Risk control measures based on these risk factors.
        In the engineering risk management study of similar projects, we can refer to research ideas for the specific and mentality circumstances of the project, establishing a risk evaluation index system for risk analysis of project risks.

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It is all known that engineering construction projects have characteristics such as long construction period, a large amount of investment and complicated construction technology, so a lot of risk factors exist during the construction period. It would be important to have proper risk management, which plays important role to effectively reduce the risk and ensure the smooth progress of construction projects. There are several major aspects that the risk management is working on: risk identification, risk assessment, risk evaluation and risk control.
This paper did comprehensive and systematic assay and research on the topic of risk management during the project construction period, after carefully review on a lot of domestic and international papers about risk management during project construction. This paper did a lot of analysis and comparison on common used methods for risk identification, risk assessment, risk evaluation and risk control. At the same time, considering the ambiguity and uncertainty of construction project information, this paper choose analytic hierarchy process and fuzzy comprehensive evaluation method to establish evaluation model for quantitative analysis of the risk during construction period. After that, this paper did case study of risk management of YGHY construction project to show the applicability of this risk evaluation index system and provided control strategies and measures to each risk factor based on evaluation result.
Case study in this in paper showed that risk management of construction project during construction period is to identify various risk factors, estimate the probability of each risk factor and to evaluate the consequences of each risk factor. And based on this information, the risk management used the relevant risk analysis and evaluation methods, fully evaluated project risk level and developed risk control measures for each risk factor.
This research idea can be used in risk management of similar cases to establish a risk evaluation index system to analyze project risk factors.