A simple proof of the optimality of a threshold policy in a two-server queueing system
Systems & Control Letters
Monotone Control of Queueing Systems with Heterogeneous Servers
Queueing Systems: Theory and Applications
Control of multiple exponential servers with application to computer systems
Control of multiple exponential servers with application to computer systems
Dynamic Routing in Large-Scale Service Systems with Heterogeneous Servers
Queueing Systems: Theory and Applications
Monotonicity in Markov Reward and Decision Chains: Theory and Applications
Foundations and Trends® in Stochastic Systems
Automation and Remote Control
Fair Dynamic Routing in Large-Scale Heterogeneous-Server Systems
Operations Research
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In this article, we show that the arguments in Rykov [9] on the optimality of a threshold routing policy when there are more than two heterogeneous servers are incomplete.