Thomas Carter, manager of the Northstar hotel, is considering
how to restructure the front desk to reach an optimum level of
staff efficiency and guest service. At present, the hotel has 9
servers on duty, each with a separate line. During the peak check
in hours of 3:00 - 5:00 pm, 105 customers arrive per hour with a
ca of 0.93. It takes an average of 4.7 minutes for the
front desk clerk to register each guest with a cp of
Thomas would like to know if changing the line configuration would
improve customer service. Specifically, he would like to have all
customers join one line which is served by 9 workers.
What is the average number of people in the lobby for service
(both waiting and being served)?