Trusted Assessment of Web Services Based on a Six-Dimensional QoS Model

To objectively assess quality of web services, we propose a six-dimensional QoWS model which includes expected QoWS, agreed QoWS, delivered QoWS, perceived QoWS, transmitted QoWS, and statistic QoWS. Then a trusted QoWS monitoring model is presented. It adopts Simple Network Management Protocol (SNMP) to respectively capture delivered QoWS, perceived QoWS, and transmitted QoWS. A new style assessment method is proposed to have two capabilities, one is assessing the given service deliver from the view of delivered QoWS and perceived QoWS, the other is assessing the given service over a period of time from the view of reputation and statistic performance experienced by consumers.