Emergency Decision-making Based On The Improved TOPSIS Method

With the accelerating pace of social and economic development, all kinds of emergenciesoccur around the world frequently. The emergencies not only cause huge losses to people’s livesand property, but also bring a lot of big threats to the stable development of the countries andregions. How to act decisively after the emergencies occurred, and how to make rational, efficientand scientific emergency decision-making, are always the focus of emergency managementresearch.Emergency decision-making is the process in which the decision-makers select the approp-riate solution and put the solution into practice when the emergency occurs. There are a variety ofways in the study of emergency decision-making: The initial research direction is digital plans,which produces the disposal plans to respond to the emergencies by the system; Later, thescholars introduce the idea of case-based reasoning into emergency decision-making, hoping tofind a similar case in the case base; While preferred solution method elects the satisfaction planby using certain decision rules which can judge the merits of a number of alternatives. Thepreferred solution method is closer to the reality and more specific, thus becoming a hot issue inemergency decision-making research，and it is the core of this study.TOPSIS method is a common method of the preferred solution method. This method sortsthe alternative plans of emergency decision-making by the degree of the approximation to idealsolution. Based on the analysis of the inadequate about the traditional TOPSIS method’s indexweighting methods, this paper puts forward the feedback mechanism according to the feedbackinformation. Then certain improvements are made in TOPSIS method based on the feedbackmechanism, and a scheme selection decision model of emergency decision-making is establishedbased on the method which achieves the dynamic decision goals by adjusting the index weightbased on the effect of the last decision. Finally, the emergency decision model is used in thespecific decision-making process of the ammonia spill, and the change of the result of thedecisionn-making shows that the result will continue to adjust and optimize with the history of thedecision-making.