Source: J. Appl. Probab. Volume 42, Number 1
(2005), 275-278.
For a GI/G/c queue, a full busy period is an interval that
begins when an arrival finds c - 1 customers in the system,
and ends when, for the first time after that, a departure leaves
behind c - 1 customers in the system. We present a
probabilistic proof of conditions for full busy periods to have
finite moments. For queues that empty, this result may be deduced
from results in the literature, but our proof is much easier. For
queues that do not empty, our proof still applies, and this result
is new.
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