Evaluation of influence of IP QoS degradation on web-QoE by severity rating method

This paper studies evaluation of influence of IP performance degradation on QoE of a Web service by means of the severity rating method. The authors consider Web usability as the QoE and tackle to evaluate it by using Nielsen´s severity rating. The severity on the Web usability is one of measures that represent how a problem degrades the usability of a Web service. This paper defines the concrete scales about the severity and evaluates them for the two existing online shopping services by experiments, which consist of the two stages. One is done to clarify problems caused by the IP performance degradation, and the other is for assessment of Web usability with the severity rating. From the results, this study clarifies the four problems and measures the severity for each problem; it then shows how the problems aggravate the Web usability of the services. Consequently, the authors confirm that the severity rating method is effective in evaluation of the influence of the IP quality deterioration on QoE of a Web service.