We analytically study optimal capacity and flexible technology selection in parallel queuing systems. We consider N stochastic arrival streams that may wait in N queues before being processed by one of many resources (technologies) that differ in their flexibility. A resource's ability to...

We study the accuracy of fluid approximations in single- and many-server queueing systems in which the arrival rate depends on the congestion in the system. If the potential demand rate exceeds the system's capacity, the fluid approximations are found to exhibit O(1)-accuracy --- their error...