A User Requirement-Driven Service Dynamic Personalized QoS Model

In Web Services composition, effectively appraising of QoS of Web Services is a main method of service selecting. Most of current QoS models do not consider the uncertainty, subjectivity, interacting and business relativity of the non-functional attributes of services. And they lack of the deep and thorough analysis of user requirements. Thus they are not able to provide sufficient support to service personalization, and they are lack of dynamic adaptability of constraints. By efficiently considering the impact on QoS model of the non-functional attributes of Web Services, this paper generates a personalized QoS model of a single service, and a dynamic personalized QoS appraise model, based on service effectiveness. The user requirement-driven service dynamic personalized QoS model proposed by this paper provides exquisite and appropriate appraise for the QoS of the whole composition flow. The analysis of the scenario shows that the method proposed in this paper is able to appraise Web Services more accurately and effectively.