Article ID: | iaor1989451 |
Country: | United Kingdom |
Volume: | 40 |
Issue: | 9 |
Start Page Number: | 797 |
End Page Number: | 803 |
Publication Date: | Sep 1989 |
Journal: | Journal of the Operational Research Society |
Authors: | Sztrik J. |
Keywords: | queues: theory |
This paper deals with a heterogeneous machine-interference model under the assumption that the priority machines have pre-emptive priority over the ordinary ones. In each group, machines are characterized by exponentially distributed failure and repair times with different rates. The failed machines are served by a single repairman according to FIFO discipline. The aim of the paper is to give the steady-state operational characteristics of the system, such as operative utilization, expected busy-period length, machine availability, mean waiting times and average number of failed machines. Finally, numerical examples illustrate the problem in question.