| Article ID: | iaor20011569 |
| Country: | Netherlands |
| Volume: | 23 |
| Issue: | 3/5 |
| Start Page Number: | 171 |
| End Page Number: | 181 |
| Publication Date: | Oct 1998 |
| Journal: | Operations Research Letters |
| Authors: | Chen H., Zhang H.Q. |
| Keywords: | queueing networks, diffusion equations |
Unlike for a single-class queueing network, diffusion approximations for a multiclass queueing network may not exist under the heavy traffic condition. In this paper, we derive a necessary and sufficient condition for the existence of the diffusion approximation for a four-class two-station multiclass queueing network (known as Kumar–Seidman network) under a priority service discipline.