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Epsilon Airlines services predominately the eastern and southeastern United States. The 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 as follows: Minimum Number of Day Employees Needed Monday 75 Tuesday 50 Wednesday 45 Thursday 60 Friday Saturday 90 75 Sunday 45 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. Find the optimal solution. Give the number of call-center employees that exceed the minimum required. Use Excel Solver. Let Xj = the number of call center employees who start work on day i (i = 1 = Monday, i = 2 = Tuesda..)

Epsilon Airlines services predominately the eastern and southeastern United States. The 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 as follows: Minimum Number of Day Employees Needed Monday 75 Tuesday 50 Wednesday 45 Thursday 60 Friday Saturday 90 75 Sunday 45 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. Find the optimal solution. Give the number of call-center employees that exceed the minimum required. Use Excel Solver. Let Xj = the number of call center employees who start work on day i (i = 1 = Monday, i = 2 = Tuesda..)

Linear Algebra: A Modern Introduction
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter2: Systems Of Linear Equations
Section2.4: Applications
Problem 28EQ
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Problem 4-09 Epsilon Airlines services predominately the eastern and southeastern United States. The 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 as follows: Minimum Number of Employees Needed Day Monday 75 Tuesday 50 Wednesday 45 Thursday 60 Friday 90 Saturday 75 Sunday 45 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. Find the optimal solution. Give the number of call-center employees that exceed the minimum required. Use Excel Solver. Let X; = the number of call center employees who start work on day i (i = 1 = Monday, i = 2 = Tuesday.)
Transcribed Image Text:Problem 4-09 Epsilon Airlines services predominately the eastern and southeastern United States. The 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 as follows: Minimum Number of Employees Needed Day Monday 75 Tuesday 50 Wednesday 45 Thursday 60 Friday 90 Saturday 75 Sunday 45 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. Find the optimal solution. Give the number of call-center employees that exceed the minimum required. Use Excel Solver. Let X; = the number of call center employees who start work on day i (i = 1 = Monday, i = 2 = Tuesday.)
Min X1 + X2 + X3 X4 Xs + X6 X7 + s.t. X1 X4 Xs + X6 X7 X X1 X5 X6 X7 + X1 X2 X3 X6 + X7 X X1 X2 X4 X7 X1 X2 + X3 X4 X5 X + + X2 X3 X4 X5 + X6 + X3 X4 X5 X6 X7 X1, X2, X3, X4, X5, X6, X7 2 0 Solution: X1 X2 X3 X4 Xs X6 X7 + + + | + + + + + + |+ + + | + +++ +++
Transcribed Image Text:Min X1 + X2 + X3 X4 Xs + X6 X7 + s.t. X1 X4 Xs + X6 X7 X X1 X5 X6 X7 + X1 X2 X3 X6 + X7 X X1 X2 X4 X7 X1 X2 + X3 X4 X5 X + + X2 X3 X4 X5 + X6 + X3 X4 X5 X6 X7 X1, X2, X3, X4, X5, X6, X7 2 0 Solution: X1 X2 X3 X4 Xs X6 X7 + + + | + + + + + + |+ + + | + +++ +++
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