A quality of service aware multi-level strategy for selection of optimal web service

The Utility-Infrastructure providers serve as an intermediary between the service providers and the service consumers. The challenge of selecting optimal Web service by these service providers based on service consumer´s preference using aggregate, score or degree has been tackled to a certain extent where optimal service selection is done in the context of subjective criterion alone. One major challenge being faced by these providers is the selection of optimal Web service when there are ties with the used criterion where the performance alternatives have the same score. We propose a Quality of Service aware multi-level strategy for selection of optimal Web services for Utility-Infrastructure providers. To get optimal Web service selection, the service consumer´s Quality of Service preference is compared with the Web service Quality of Service offerings. The offering that best matches the Quality of Service preference is taken to be the optimal one. We consider two alternative e-Market services for our Quality of Service driven service selection: the Information services and the Complex services. We concentrate on the Information services and our model uses the non deterministic Quality of Service metrics. In our experiment, we use Web service data set Quality of Service information as our input and the experimental results show that our proposed multilevel strategy model can satisfy service consumers´ request based on our non-functional requirements.