Mathematics – Probability
Scientific paper
2012-01-12
Mathematics
Probability
Submitted to Applied Probability Trust
Scientific paper
In the present paper we consider general counting processes stopped at a random time T, independent of the process. Provided that T has the decreasing failure rate (DFR) property, we give sufficient conditions on the arrival times so that the number of events occurring before T preserves the DFR property of T. These conditions are: decreasing behaviour and association of the interarrival times. In particular, when the interarrival times are independent, we consider applications concerning the DFR property of the stationary number of customers waiting in queue for specific queuing models.
Badía F. G.
Sangüesa Carmen
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