Abstract:

With the development of the Web service technology, the service mode based software is widely used in the fields of health care, education and public transportation. However, QualityofService (QoS) control is still one of the difficulties in the service technology. In the process of service combination, considering the design-time service and run-time service modes, two service design modes Over Design (OD) and Under Design (UD) are proposed. The variability space that constrains service combination is constructed to achieve the goal of QoS control. We show OD and UD cases in E-commence scenarios and use value based analysis to justify the significance of reducing OD and UD.

Key words: web service;service combination;under design;over design;QoS control