Cloud computing migration and IT resources rationalization

Nowadays, almost all organizations are using Information technology (IT) tools to manage their business. Information systems (IS) organizations involved in these areas are as diverse as system management, advertising, online sales and also maintenance and communication. IS becomes increasingly complex making it difficult to follow the complex growing demands of IT resources requirements. Cloud Computing has emerged as a model, where all the essential components of a computer system such as software applications, platforms for software development or physical infrastructure are considered as services and are delivered according to a mode of using the application based on the needs of the users. Hence the need to implement this concept to rationalize the use of IS resources. In this paper we present the current state of information systems organizations. We show the limitations and issues related to the use of these conventional architectures. Then we introduce the concept of Cloud Computing and discuss the different motivations for this technology. We present a decision process aimed at supporting Information system migration to the Cloud, and then we propose a synthesis for the choice of Cloud structures according to type of organization. We show the use of Cloud for the management of organizations focusing on the benefits and the various problems associated with its use. And we propose an experimental validation showing the feasibility of migrating to the Cloud. We finish by giving a general summary and a proposal of future works.