Simulation Study On Effectiveness Of Security System Based On System Dynamics

In this paper,from five perspectives that affect the effectiveness of the security system,the system dynamics(SD)related theory is used to construct a security system flow graph model.The factors that affect the effectiveness of the security system are divided into human prevention,physical prevention,technical prevention,safety management and emergency response,and the second-level impact factors of each factor are extracted.The simulation is simulated by Vensim-PLE software to study how to coordinate the investment ratio of each factor to achieve the best safety benefits.Based on the relevant theories and methods of system dynamics,the research contents of the factors affecting the effectiveness of the security system are as follows:(1)The effectiveness of the security system is divided into five primary impact indicators: human prevention subsystem,physical prevention subsystem,technical prevention subsystem,safety management subsystem and emergency response subsystem;(2)By analyzing the related influencing factors of each subsystem,the second-level influencing factors of the system are determined,and the index system of the influencing factors of the effectiveness of the security system is constructed.After taking into account the interaction between the various factors,the flow diagram model of the security system is established from the perspective of input and output.By means of analytic hierarchy process(ahp),expert investigation method and other methods,the weights,initial values and interaction coefficients of each factor are determined,which laid a foundation for the operation of the model;(3)The system dynamics software Vensim–PLE is used to simulate the constructed model,and the effect status and feedback mechanism of the influencing factors of the security system on the system effectiveness are obtained.Through the analysis of simulation results and comparative simulation experiment results,it provides decision support for the investment configuration of enterprise security system construction.Based on the above research contents,the research conclusions are as follows:(1)Among the five major subsystems,the order of impact on system performance is human prevention subsystem,technical prevention subsystem,physical prevention subsystem,safety management subsystem and emergency response subsystem,but there is nothing trivial in front of security,and it cannot be ignored because of the low weight of factors,otherwise the meaning of simulation will be lost;(2)The improvement of the effectiveness of the security system is inseparable from the investment of long-term safety funds;(3)In the case of a certain amount of safety investment,the effect of the equal investment on each subsystem is the worst.In order to improve the efficiency of security system to the target level in a short period of time,the decision manager must give the input ranking according to the actual situation;(4)Compared with the traditional hard factors such as human prevention,physical prevention,and technical prevention,the effectiveness of the two subsystems of security management and emergency response are slow to improve.However,through simulation,it is found that,under certain circumstances of safety investment,appropriately increasing the investment in construction of safety management and emergency response,the effect of improving the effectiveness of the security system is the best.In short,from a scientific point of view,this paper uses system dynamics methods to study the effectiveness of complex security systems,establishes a system model of effectiveness influencing factors,and explores the mechanism of interaction between various influencing factors within the system,aiming to introduce system dynamics into the research of the field of security precautions,a new research idea is proposed.