信息系统(IS)是对信息进行收集、存储、检索、加工和传输的人—机系统。企业运用信息系统是以加强管理、增加效益、提高盈利水平为目的,为企业决策提供信息依据的一种辅助手段。许多企业在经营管理压力越来越大的情况下,为了规避风险、增加效益,建立了各类系统以实现不同的管理要求。比如,房地产企业运用信息 Information System (IS) is a human-machine system that collects, stores, retrieves, processes and transmits information. Enterprise information system is to strengthen management, increase efficiency, improve profitability for the purpose of providing an information basis for business decision-making an auxiliary means. Many enterprises in the business management under increasing pressure, in order to avoid risks and increase efficiency, established a variety of systems to achieve different management requirements. For example, real estate companies use information