Bank 24 is open 24 hours per day. Tellers work twoconsecutive 6-hour shifts and are paid $10 per hour. Thepossible shifts are as follows: midnight–6 A.M., 6 A.M.–noon,noon–6 P.M., 6 P.M.–midnight. During each shift, thefollowing numbers of customers enter the bank: midnight–6 A.M., 100; 6 A.M.–noon, 200; noon–6 P.M., 300;6 P.M.–midnight, 200. Each teller can serve up to 50customers per shift. To model a cost for customerimpatience, we assume that any customer who is present atthe end of a shift “costs” the bank $5. We assume that bymidnight of each day, all customers must be served, so eachday’s midnight–6 A.M. shift begins with 0 customers in thebank. Formulate an LP that can be used to minimize thesum of the bank’s labor and customer impatience costs.

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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Bank 24 is open 24 hours per day. Tellers work two
consecutive 6-hour shifts and are paid $10 per hour. The
possible shifts are as follows: midnight–6 A.M., 6 A.M.–noon,
noon–6 P.M., 6 P.M.–midnight. During each shift, the
following numbers of customers enter the bank: midnight–
6 A.M., 100; 6 A.M.–noon, 200; noon–6 P.M., 300;
6 P.M.–midnight, 200. Each teller can serve up to 50
customers per shift. To model a cost for customer
impatience, we assume that any customer who is present at
the end of a shift “costs” the bank $5. We assume that by
midnight of each day, all customers must be served, so each
day’s midnight–6 A.M. shift begins with 0 customers in the
bank. Formulate an LP that can be used to minimize the
sum of the bank’s labor and customer impatience costs.

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