The Fitness Evaluation Model of SAAS for Enterprise Information System

This paper makes a comparative analysis of SaaS's relative merits from the aspects of cost, solution, software maintenance, network application and security. SaaS not only possesses the advantages of low upfront investment, flexible customization, rapid implementation and professional services but also has some disadvantages, such as higher long-term rent, lack of personalized solutions, network instability and data security. On the basis of the analysis above, it summarizes all kinds of constraints which enterprise information systems suitable to SaaS should follow, including industry standardization, business complexity, system performance and security requirement. Then, a fitness evaluation model is established. The model evaluates enterprise information systems from three aspects: enterprise resource, system features and SaaS service. At last, the paper makes some comments on the evaluation results and estimates whether SaaS is suitable for the information system evaluated.