“…QoS requirements for those online services are specified using metrics on timeliness (e.g., response time, delay and jitter), precision (e.g., bandwidth and loss rate) and accuracy of services (e.g., error rate). When competing service requests with specific QoS requirements come to a computer network system providing services, the system must determine if its limited system resources can satisfy these service requests at the required level of QoS and furthermore what service configuration, resource configuration and service-resource binding should be used for the achieved QoS (Jiang et al, 2008;Reisslein et al, 2002;Peng et al, 2002;Yang et al, 2008;Yau et al, 2007;Zhou et al, 2005;. The competing service requests and resulting service activities change the state of limited system resources which in turn affects the achieved QoS .…”