Article ID: | iaor20011066 |
Country: | United States |
Volume: | 47 |
Issue: | 3 |
Start Page Number: | 438 |
End Page Number: | 444 |
Publication Date: | May 1999 |
Journal: | Operations Research |
Authors: | Frostig Esther, Levikson Benny |
Keywords: | programming: dynamic, queues: applications |
We consider here the optimal routing of customers, arriving to a system consisting of two heterogeneous parallel servers. The service times of the two servers have an increasing hazard rate. The arrival process is a general renewal process. The cost of holding x customers in the system per time unit is a nondecreasing and convex function. The objective is to minimize the expected discounted holding costs. We show some monotonicity properties of the optimal policy. Then we show that the optimal policy routes an arriving customer to the fastest server whenever this server has the lowest workload.