Abstract:

Summarizes the achievement and drawbacks of the Web Quantities of Service(QoS) evaluation methods, proposes a new mode of  Web service QoS quantitative evaluation basedon grey system theory. The mode selects Web service QoS evaluation factors, and determines the weight set of quality factors, and computes grey relevance degree between quality factors and perfect reference datum. By a real application, we obtain the Web service QoS about weather information from 6 weather institutes in the QWS dataset, compute out the real evaluation results of 7 Web service QoS, compare the results with other evaluation methods, and propose the future work. The resultsshows that the mode fits the application characters of grey system theory and the development direction of Web service. As the tool of Web QoS quantitative evaluation, our model becomes the foundation of Web service trustworthy application and electronic commerce.

Key words: Web service;Web service QoS evaluation;grey system theory;grey evaluation mode