Abstract
To distribute the score of composite service obtained from customer to each component service based on actual and historical performance of component services, Analytic Hierarchy Process( AHP) was used to calculate the distribution weight of each component service, in which a method was presented to convert Web service process into structure tree process,and the weight matrix was used to calculate the weight of each node in the tree structure. The relationship between actual Quality of Service( QoS) of component services and its advertised utility interval of QoS were taken into consideration, and through deviation function, the deviation proportion between actual QoS utility value of component service and actual QoS average utility value of all component services was calculated, meanwhile the influence on score distribution by history performance of each component service was considered. The experimental results show that actual QoS and history performance of component services have some influence on score which was distributed, and demonstrate that the proposed approach can achieve a reasonable and fair score distribution.
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