Epsilon Airlines services predominately the eastern and southeastern United States. A vast majority of Epsilon's customers make reservations through Epsilon's website, but a small percentage of customers make reservations via phone. Epsilon employs call-center personnel to handle these reservations along with any problems with the website reservation system and for the rebooking of flights for customers if their plans change or their travel is disrupted. Staffing the call center appropriately is a challenge for Epsilon's management team. Having too many employees on hand is a waste of money, but having too few results in very poor customer service and the potential loss of customers. Epsilon analysts have estimated the minimum number of call-center employees needed by day of week for the upcoming vacation season (June, July, and the first two weeks of August). These estimates are given in the following table. Minimum Number of Day Employees Needed Monday 75 Tuesday 50 Wednesday 45 Thursday 55 Friday 85 Saturday 65 Sunday 35 The call-center employees work five consecutive days and then have two consecutive days off. An employee may start work any day of the week. Each call-center employee receives the same salary Assume that the schedule cycles and ignore start-up and stopping of the schedule. Develop a model that will minimize the total number of call-center employees needed to meet the minimum requirements. (Let X, = the number of call-center employees who start work on day i where i = 1 = Monday, i = 2 = Tuesday, etc). Min s.t. Monday Tuesday Wednesday Thursday

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter12: Queueing Models
Section: Chapter Questions
Problem 59P
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The call-center employees work five consecutive days and then have two consecutive days off. An employee may start work any day of the week. Each call-center employee receives the same salary.
Assume that the schedule cycles and ignore start-up and stopping of the schedule. Develop a model that will minimize the total number of call-center employees needed to meet the minimum
requirements. (Let X; = the number of call-center employees who start work on day i where i = 1 = Monday, i = 2 = Tuesday, etc).
Min
s.t.
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
X1, X2, X31 X4, X5, X6, X, z 0
Find the optimal solution.
(X1, X2, X3, X4, X5, Xg, X7) =
Give the number of call-center employees that exceed the minimum required.
(M, Tu, W, Th, F, Sa, Su) =
Transcribed Image Text:The call-center employees work five consecutive days and then have two consecutive days off. An employee may start work any day of the week. Each call-center employee receives the same salary. Assume that the schedule cycles and ignore start-up and stopping of the schedule. Develop a model that will minimize the total number of call-center employees needed to meet the minimum requirements. (Let X; = the number of call-center employees who start work on day i where i = 1 = Monday, i = 2 = Tuesday, etc). Min s.t. Monday Tuesday Wednesday Thursday Friday Saturday Sunday X1, X2, X31 X4, X5, X6, X, z 0 Find the optimal solution. (X1, X2, X3, X4, X5, Xg, X7) = Give the number of call-center employees that exceed the minimum required. (M, Tu, W, Th, F, Sa, Su) =
A linear programming computer package is needed.
Epsilon Airlines services predominately the eastern and southeastern United States. A vast majority of Epsilon's customers make reservations through Epsilon's website, but a small percentage of
customers make reservations via phone. Epsilon employs call-center personnel to handle these reservations along with any problems with the website reservation system and for the rebooking of
flights for customers if their plans change or their travel is disrupted. Staffing the call center appropriately is a challenge for Epsilon's management team. Having too many employees on hand is a
waste of money, but having too few results in very poor customer service and the potential loss of customers.
Epsilon analysts have estimated the minimum number of call-center employees needed by day of week for the upcoming vacation season (June, July, and the first two weeks of August). These
estimates are given in the following table.
Minimum Number of
Day
Employees Needed
Monday
75
Tuesday
50
Wednesday
45
Thursday
55
Friday
85
Saturday
65
Sunday
35
The call-center employees work five consecutive days and then have two consecutive days off. An employee may start work any day of the week. Each call-center employee receives the same salary.
Assume that the schedule cycles and ignore start-up and stopping of the schedule. Develop a model that will minimize the total number of call-center employees needed to meet the minimum
requirements. (Let X; = the number of call-center employees who start work on day i where i = 1 =
Monday, i = 2 =
Tuesday, etc).
Min
s.t.
Monday
Tuesday
Wednesday
Thursday
Friday
Transcribed Image Text:A linear programming computer package is needed. Epsilon Airlines services predominately the eastern and southeastern United States. A vast majority of Epsilon's customers make reservations through Epsilon's website, but a small percentage of customers make reservations via phone. Epsilon employs call-center personnel to handle these reservations along with any problems with the website reservation system and for the rebooking of flights for customers if their plans change or their travel is disrupted. Staffing the call center appropriately is a challenge for Epsilon's management team. Having too many employees on hand is a waste of money, but having too few results in very poor customer service and the potential loss of customers. Epsilon analysts have estimated the minimum number of call-center employees needed by day of week for the upcoming vacation season (June, July, and the first two weeks of August). These estimates are given in the following table. Minimum Number of Day Employees Needed Monday 75 Tuesday 50 Wednesday 45 Thursday 55 Friday 85 Saturday 65 Sunday 35 The call-center employees work five consecutive days and then have two consecutive days off. An employee may start work any day of the week. Each call-center employee receives the same salary. Assume that the schedule cycles and ignore start-up and stopping of the schedule. Develop a model that will minimize the total number of call-center employees needed to meet the minimum requirements. (Let X; = the number of call-center employees who start work on day i where i = 1 = Monday, i = 2 = Tuesday, etc). Min s.t. Monday Tuesday Wednesday Thursday Friday
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