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?
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?
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
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