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The IT transformation deepen increasingly embodied in depth the development and integration of innovative technology . With the depth of integration of IT transformation , technology , networks , applications , and services , continuous innovation and industry to industry and business model , the competitive advantage of the industry is more focused on the control of the above IT , SaaS ( Software as a Service ) mode the emergence and development is a typical example . The SaaS model is the result of the integration of innovative software technology and network technology , and it has changed the traditional software delivery model , from the back to the intangible nature of the delivery of the physical form . SaaS model , a variety of software development resources to integrate SaaS operating platform , while the software is delivered in the form of services , software hirers more aspects and cost - effective use of software . The SaaS model is the trend of the future development of the software industry , it has become a hot research industry , but are mainly for three of its operating mode and the characteristics of the application and design of the system , key technologies and security policies , but the lack of their overall development . This article presented a complex integrated network , ecology, organizational networks , statistical theory and methods , explore IT transformation under the influence of the the SaaS ecosystem formation process and the evolution trajectory . First , this paper analyzes the change in IT from the morphological changes in the structure of the industry chain between the traditional software industry with the SaaS model , ecosphere and value chain , the formation and development of SaaS ecosystem is a self-organizing process , the essence of the changes in the business niche , eventually showed morphological changes of the network structure ; then , the paper demonstrates the SaaS ecosystem has the characteristics of complex networks , small world and scale-free property and BA extended model , SaaS ecological static structure and dynamic evolution of the system , the simulation analysis , the characteristics of various types of enterprises and system architecture evolution analysis system characteristics with specific rules ; Finally, using the case study method , IT changes caused further demonstrated that the SaaS ecosystem changes in the formation of its structure , and pointed out that some of the network problems exist in the system , and put forward related strategies to address these issues .
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