Q3) Southern Sporting Goods Company makes basketballs, soccer balls, and footballs. Each product is produced from three main materials-rubber, leather, and cotton (for lining) and processed in a machine that is available for 500 minutes. All finished products are stored in the warehouse until the shipment. The material requirements, processing time, and volume requirements for each product are displayed in the table below. Total resource ETTTT Basketballs Soccer balls Footballs 2.5 available 350 Rubber (Ib) Leather (sq. ft.) Lining (sq. ft.) Machine processing Storage space (ft=) 3 1.5 2.5 3.5 350 2 2.5 2 400 3 2.5 500 15 8 1200 Each basketball and soccer ball produced results in a profit of $10 and $9, and each football earns $11 in profit. The manager developed a mathematical model and solved it using excel solver. Answer the following questions based on the excel solver sensitivity report below. Assume that the decision variables are continuous. wiable Cells Final Reduced Objective Allowable Cost Allowable Decrease 10 10.02941176 0861111111 9 1.823529412 2.384615385 4.05952381 Cell Name Value 30.32258065 82.90322581 Coefficient Increase SC$13 Production: Basketballs SDS13 Production: Soccerballs SES13 Production: Footballs 30 96774194 11 1.9375 nstraints Final Value 292.7419355 350 329 8387007 Shadow Constraint Allowable RH. Side 350 Allowable Decrease 1E+30 57.25806452 350 131.4814815 57.14285714 1E+30 70.16129032 500 131.8181818 197.6023077 1200 417.6470588 261.1111111 Price Cell SG$6 Rubber (b) Usage SGS7 Leather (sq .) Usage SG$8 Lining (sq R.) Usage SG$9 Machine processing time (min) Usage SG$10 Storage space () Usage Name Increase 2.2 400 500 1200 0.1 a. Defining the number of basketballs, soccer balls, and the football produced as the decision variables, formulate the objective function and constraints. b. What would be the change in the profit, if the available rubber drops to 340 pounds? c. What is the range for the profit from basketball that keeps the current solution optimal? d. If either one additional sq. ft. of leather or one additional sq. ft. of cotton lining is being added to the current resources, what would your decision be? What would the effect of this decision on the profit be? e. The available machine processing time of 500 minutes includes 420 minutes of regular time and 80 minutes of overtime. Given that the cost of over time is $50.00, would you agree with the manager's decision of having over time? Why? f. Given the prices of the resources reported by the excel solver and resources required to produce one soccer ball, what is the total value of resources used to produce one soccer ball?

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ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
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Q3) Southern Sporting Goods Company makes basketballs, soccer balls, and footballs.
Each product is produced from three main materials-rubber, leather, and cotton (for
lining) and processed in a machine that is available for 500 minutes. All finished
products are stored in the warehouse until the shipment. The material requirements,
processing time, and volume requirements for each product are displayed in the table
below.
Total resource
available
Basketballs Socer balls Footballs
Rubber (Ib)
3
1.5
2.5
350
Leather (sq. ft.)
Lining (sq. ft.)
Machine processing
Storage space (ft)
2.5
2
3.5
350
2
2.5
2
400
3
4
2.5
500
15
6
8
1200
Each basketball and soccer ball produced results in a profit of $10 and $9, and each
football earns $11 in profit. The manager developed a mathematical model and solved
it using excel solver. Answer the following questions based on the excel solver
sensitivity report below. Assume that the decision variables are continuous.
iriable Cells
Final
Reduced Objective
Allowable
Allowable
Cell
Name
Value
Cost
Coefficient Increase
Decrease
SC$13 Production: Basketballs
SO$13 Production: Soccerballs
SE$13 Production: Footballs
30.32258065
82.90322581
30.96774194
10 10.02941176 0.861111111
9 1.823529412 2.384615385
1.9375 4.05952381
11
Anstraints
Final
Shadow Constraint
Allowable
Allowable
Value
292.7419355
350
329.8387097
Cell
Name
Price
RH. Side
Increase
350
350 131.4814815 57.14285714
400 1E+30 70. 16129032
500 131.8181818 197.6923077
1200 417.6470588 261.1111111
Decrease
1E+30 57.25806452
SG$6 Rubber (Ib) Usage
SGS7 Leather (sq. t.) Usage
SG$8 Lining (aq, R.) Usage
SGS9 Machine processing time (min) Usage
SGS10 Storage space () Usage
2.2
500
1200
0.1
a. Defining the number of basketballs, soccer balls, and the football produced as the
decision variables, formulate the objective function and constraints.
b. What would be the change in the profit, if the available rubber drops to 340
pounds?
c. What is the range for the profit from basketball that keeps the current solution
optimal?
d. If either one additional sq. ft. of leather or one additional sq. ft. of cotton lining is
being added to the current resources, what would your decision be? What would the
effect of this decision on the profit be?
e. The available machine processing time of 500 minutes includes 420 minutes of
regular time and 80 minutes of overtime. Given that the cost of over time is $50.00,
would you agree with the manager's decision of having over time? Why?
f. Given the prices of the resources reported by the excel solver and resources
required to produce one soccer ball, what is the total value of resources used to
produce one soccer ball?
g. Would you consider extending the storage space? How much are you willing to
pay for an additional ft3 of space?
h. Assume that SSGC is now considering producing softballs. It requires 2 lbs. of
rubber, 3 sq. ft. of leather, 2 sq. ft. of cotton lining to produce one softball and it
takes 3 minutes of machine time to process. It requires 10 ft3 in storage space. The
profit from a softball is expected to be $10.5. How many softballs would you
produce?
i. Given the mathematical formulation in part a, define variables for the dual
problem and formulate objective function and constraints.
Transcribed Image Text:Q3) Southern Sporting Goods Company makes basketballs, soccer balls, and footballs. Each product is produced from three main materials-rubber, leather, and cotton (for lining) and processed in a machine that is available for 500 minutes. All finished products are stored in the warehouse until the shipment. The material requirements, processing time, and volume requirements for each product are displayed in the table below. Total resource available Basketballs Socer balls Footballs Rubber (Ib) 3 1.5 2.5 350 Leather (sq. ft.) Lining (sq. ft.) Machine processing Storage space (ft) 2.5 2 3.5 350 2 2.5 2 400 3 4 2.5 500 15 6 8 1200 Each basketball and soccer ball produced results in a profit of $10 and $9, and each football earns $11 in profit. The manager developed a mathematical model and solved it using excel solver. Answer the following questions based on the excel solver sensitivity report below. Assume that the decision variables are continuous. iriable Cells Final Reduced Objective Allowable Allowable Cell Name Value Cost Coefficient Increase Decrease SC$13 Production: Basketballs SO$13 Production: Soccerballs SE$13 Production: Footballs 30.32258065 82.90322581 30.96774194 10 10.02941176 0.861111111 9 1.823529412 2.384615385 1.9375 4.05952381 11 Anstraints Final Shadow Constraint Allowable Allowable Value 292.7419355 350 329.8387097 Cell Name Price RH. Side Increase 350 350 131.4814815 57.14285714 400 1E+30 70. 16129032 500 131.8181818 197.6923077 1200 417.6470588 261.1111111 Decrease 1E+30 57.25806452 SG$6 Rubber (Ib) Usage SGS7 Leather (sq. t.) Usage SG$8 Lining (aq, R.) Usage SGS9 Machine processing time (min) Usage SGS10 Storage space () Usage 2.2 500 1200 0.1 a. Defining the number of basketballs, soccer balls, and the football produced as the decision variables, formulate the objective function and constraints. b. What would be the change in the profit, if the available rubber drops to 340 pounds? c. What is the range for the profit from basketball that keeps the current solution optimal? d. If either one additional sq. ft. of leather or one additional sq. ft. of cotton lining is being added to the current resources, what would your decision be? What would the effect of this decision on the profit be? e. The available machine processing time of 500 minutes includes 420 minutes of regular time and 80 minutes of overtime. Given that the cost of over time is $50.00, would you agree with the manager's decision of having over time? Why? f. Given the prices of the resources reported by the excel solver and resources required to produce one soccer ball, what is the total value of resources used to produce one soccer ball? g. Would you consider extending the storage space? How much are you willing to pay for an additional ft3 of space? h. Assume that SSGC is now considering producing softballs. It requires 2 lbs. of rubber, 3 sq. ft. of leather, 2 sq. ft. of cotton lining to produce one softball and it takes 3 minutes of machine time to process. It requires 10 ft3 in storage space. The profit from a softball is expected to be $10.5. How many softballs would you produce? i. Given the mathematical formulation in part a, define variables for the dual problem and formulate objective function and constraints.
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