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Top1. Introduction
Emergency plan is compiled for possible major accidents (pieces) or disasters, in order to ensure rapid, orderly and effective implementation of the emergency and rescue operations, reduce accident losses and pre-establish related plans or programs. It has an important position and role in the emergency work (Liu Gongzhi & Liu Tiemin, 2004). Current management of emergency plan is not standard, including the compilation and revision procedures, the content, examination, testing, training, exercises, approval and record, etc., which do not have a clear management approach (Li Husheng, 2008). Liu Tiemin (2011) mentioned in the paper that only by continually assess and improve the emergency plan we could maintain its vitality, and this continuous improvement is achieved through the PDCA cycle mode. On the basis of that, Sun Changkun (2008) put forward a dynamic enterprise plan management mode. The dynamic management of these plans is from the macro aspect and there is no in-depth study of dynamic management and revision strategies for the plan. In order for the plan to take reasonable dynamic management approach to maintain the effectiveness of the plan, we need to study the life cycle of it.
At present the life cycle theories in various academic fields have achieved a lot of results. In addition to the product life cycle theory, the enterprise life cycle theory, and industry life cycle theory, there are organizational life cycle theory, leadership life cycle theory, the family life cycle theory and so on. Literature (Li Kai & Dai Lihua, 2005) found the life cycle of iron and steel industry in U.S using Pierre curve and Gompers curve method and Japanese was fitting the S-shaped pattern. Literature (Zhao Yibin & Hu Shuntian, 2003)get the stock market growth curve which was S-shaped conclusions. Literature (Han Yongfu & Han Fang, 1999) proposed that the product life cycle curve generally showed a symmetrical S-shaped curve by modifying the model. University of Western Ontario Scholars R. W. Butler (1980) proposed the concept of tourism area life cycle. He used the basic S-curve to describe the tourism population’s mobility and decline.
At present, there is little study about the plan life cycle. Literature (Wang Yingjie & Luo Fengxia, 2012) proposed an entire life-cycle management model for urban rail transit plan. This mode only proposed management processes and implementation methods, but did not discuss the life cycle of plan itself. Literature (Zhang Yaqin, 2009) outlined the high-speed rail safety issues for the current status of the railway system emergency plan, and proposed a method of whole life cycle management of high-speed railway plan, including compilation process, examination and approval of emergency plan, revision four links. According to these four aspects it gives some suggestions to improve the emergency plan, which settled in the management plan not the life cycle of plan itself. LIU Tie-min (2005) proposed, the former China had initially formed an emergency plan framework, but in the future we need to pay attention to the standard operating procedures (SOPS) and security support systems to intensify our work. In order to clarify the dynamic management plan, we need to study the life cycle of plan to understand the changes of plan in the whole life cycle, and then we could pertinently manage the plan.