Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

The bank is working to develop an efficient work schedule for full-time and part-time tellers. The schedule must provide for efficient operation of the bank,

The bank is working to develop an efficient work schedule for full-time and part-time tellers. The schedule must provide for efficient operation of the bank, including adequate customer service, employee breaks, and so on. On Fridays, the bank is open from 9:00 A.M. to 7:00 P.M. The number of tellers necessary to provide adequate customer service during each hour of operation is summarized here.

Time No. of Tellers Time No. of Tellers
9:00 a.m.-10:00 a.m. 4 2:00 p.m.-3:00 p.m. 5
10:00 a.m.-11:00 a.m. 3 3:00 p.m.-4:00 p.m. 3
11:00 a.m.-Noon 7 4:00 p.m.-5:00 p.m. 6
Noon-1:00 p.m. 11 5:00 p.m.-6:00 p.m. 4
1:00 p.m.-2:00 p.m. 7 6:00 p.m.-7:00 p.m. 7

Each full-time employee starts on the hour and works a 4-hour shift, followed by a 1-hour break and then a 3-hour shift. Part-time employees work one 4-hour shift beginning on the hour. Considering salary and fringe benefits, full-time employees cost the bank $15 per hour ($105 a day), and part-time employees cost the bank $8 per hour ($32 per day).

(a) Formulate an integer programming model that can be used to develop a schedule that will satisfy customer service needs at a minimum employee cost. (Hint: Let xi = number of full-time employees coming on duty at the beginning of hour i and yj = number of part-time employees coming on duty at the beginning of hour j.)
If your answer is zero enter 0 and if the constant is "1" it must be entered in the box.
Min x9 + x10 + x11 + y9 + y10 + y11 + y12 + y1 + y2 + y3
s.t. x9 + x10 + x11 + y9 + y10 + y11 + y12 + y1 + y2 + y3 Time (9:00 a.m.-10:00 a.m.)
x9 + x10 + x11 + y9 + y10 + y11 + y12 + y1 + y2 + y3 Time (10:00 a.m.-11:00 a.m.)
x9 + x10 + x11 + y9 + y10 + y11 + y12 + y1 + y2 + y3 Time (11:00 a.m.-Noon.)
x9 + x10 + x11 + y9 + y10 + y11 + y12 + y1 + y2 + y3 Time (Noon.-1:00 p.m.)
x9 + x10 + x11 + y9 + y10 + y11 + y12 + y1 + y2 + y3 Time (1:00 p.m.-2:00 p.m.)
x9 + x10 + x11 + y9 + y10 + y11 + y12 + y1 + y2 + y3 Time (2:00 p.m.-3:00 p.m.)
x9 + x10 + x11 + y9 + y10 + y11 + y12 + y1 + y2 + y3 Time (3:00 p.m.-4:00 p.m.)
x9 + x10 + x11 + y9 + y10 + y11 + y12 + y1 + y2 + y3 Time (4:00 p.m.-5:00 p.m.)
x9 + x10 + x11 + y9 + y10 + y11 + y12 + y1 + y2 + y3 Time (5:00 p.m.-6:00 p.m.)
x9 + x10 + x11 + y9 + y10 + y11 + y12 + y1 + y2 + y3 Time (6:00 p.m.-7:00 p.m.)
xi, yj 0 and integer for i = 9, 10, 11 and j = 9, 10, 11, 12, 1, 2, 3
(b) Solve the LP Relaxation of your model in part (a).
If required, round your answers to the nearest whole number. If your answer is zero enter 0.
x9
x10
x11
y9
y10
y11
y12
y1
y2
y3
Total Cost: $
(c) Solve for the optimal schedule of tellers.
If your answer is zero enter 0.
Time No. of Full-time employees No. of Part-time employees
9:00 a.m.-10:00 a.m.
10:00 a.m.-11:00 a.m.
11:00 a.m.-Noon
Noon-1:00 p.m.
1:00 p.m.-2:00 p.m.
2:00 p.m.-3:00 p.m.
3:00 p.m.-4:00 p.m.
4:00 p.m.-5:00 p.m.
5:00 p.m.-6:00 p.m.
6:00 p.m.-7:00 p.m.
(d) After reviewing the solution to part (c), the bank manager realized that some additional requirements must be specified. Specifically, she wants to ensure that one full-time employee is on duty at all times and that there is a staff of at least six full-time employees. Revise your model to incorporate these additional requirements, and solve for the optimal solution.
If required, round your answers to the nearest whole number. If your answer is zero enter 0.
The new optimal solution is as follows:
Time No. of Full-time employees No. of Part-time employees
9:00 a.m.-10:00 a.m.
10:00 a.m.-11:00 a.m.
11:00 a.m.-Noon
Noon-1:00 p.m.
1:00 p.m.-2:00 p.m.
2:00 p.m.-3:00 p.m.
3:00 p.m.-4:00 p.m.
4:00 p.m.-5:00 p.m.
5:00 p.m.-6:00 p.m.
6:00 p.m.-7:00 p.m.
Total Cost: $

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

The International Handbook Of Shipping Finance

Authors: Manolis G. Kavussanos, Ilias D. Visvikis

1st Edition

ISBN: 113746545X, 978-1137465450

More Books

Students also viewed these Finance questions