Practical Management Science
6th Edition
ISBN: 9781337406659
Author: WINSTON, Wayne L.
Publisher: Cengage,
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The following information pertains to telephone calls to a motel switchboard on a typical Tuesday.
Period
Incoming Rate
(calls per
minute)
Service Rate
(calls per minute
per operator)
Number of
Operators
Morning 1.8 1.5 2
Afternoon 2.2 1.0 3
Evening 1.4 0.7 3
a. Determine the average time callers wait to have their calls answered for each period and the
probability that a caller will have to wait for each period.
b. For each case in the previous problem, determine the maximum line length for a probability of
96 percent.
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