Project security risk assessment is to determine the single risk of the project after risk identification through full and systematic consideration of all uncertainties and risk elements of the project. Then, the risk of the project is evaluated comprehensively. It is based on the planning, identification, and estimation of project risks, through the establishment of the risk system model, to find the key risks of the project, to determine the overall risk level of the project, to provide a scientific basis for how to deal with these risks, to ensure the smooth progress of the project.
The basis of project security risk assessment is to first estimate the following items: the probability of occurrence of risk events, the range of possible results and the degree of harm, the expected time of occurrence, the frequency of risk events caused by a risk factor.
Methods of project security risk analysis can be divided into qualitative analysis, quantitative analysis, and comprehensive analysis.
Qualitative analysis methods include expert investigation method, failure mode, and consequence analysis method, etc.
Quantitative analysis methods include a fuzzy comprehensive evaluation method, AHP, Monte Carlo simulation method, control interval memory model, neural network method, risk map method, etc.
Comprehensive analysis methods include fault tree method, event tree method, influence diagram method, cause result analysis method, risk evaluation matrix method, and various comprehensive improvement methods, such as expert confidence index method, fuzzy level comprehensive evaluation method, fuzzy event tree analysis method, fuzzy impact diagram method, and other comprehensive evaluation methods.