Formulate and solve an lp problem

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Reference no: EM13879177

An organic apple processor produces apple juice in four locations in the United States with the following yearly capacities:

San Francisco

110,000

Chicago

50,000

San Antonio

40,000

New York

100,000

Total supply                      300,000 gallons/year

It currently sells 300,000 gallons per year to the following regions of the United States:


East

150,000

South

25,000

West

75,000

North

50,000

Total demand                    300,000 gallons/year

The company expects that the demand for the next year will increase by 30,000 gal- lons in the East, 5,000 gallons in the South, 10,000 gallons in the West, and 1,000 gal- lons in the North. Hence, total demand for the United States will increase from 300,000 to 346,000 gallons. In addition, the company has just negotiated a sale of 200,000 additional gallons to Japan. Thus, while the business currently can produce only 300,000 gallons, they face a demand of 546,000 gallons in the next year. The company has identified three options in meeting this new demand:

1. Purchase one new processing plant in Portland, Oregon, with a capacity of 300,000 gallons per year.
2. Purchase one new plant in Birmingham, Alabama, with a capacity of 150,000 gal- lons per year and another new plant in Syracuse, New York, with a capacity of 150,000 gallons.
3. Purchase a new plant in Seattle, Washington, with a capacity of 100,000 gallons, and expand their San Francisco plant from its current capacity of 110,000 to 310,000 gallons per year.

The total variable production cost (not including transportation costs) for each exist- ing facility and the three expansion options are listed below:

 

Plant

Variable Production Costs ($/gallon)

San Francisco (110,000 capacity)

5.00

Chicago

4.50

San Antonio

4.00

New York

5.50

Portland

5.00

Birmingham*

5.76

Syracuse*

6.00

Seattle*

6.20

San Francisco (310,000 capacity)*

6.30

*Includes expansion costs.

 

The transportation cost per gallon from each supply to each demand node is:

                                                 Demand Location

 

Plant

East

South           West           North (cents per gallon shipped)

Japan

Supply (1,000 gallons)

 

 

San Francisco

 

 

100

 

 

85

 

 

10

 

 

45

 

 

200

 

 

110

Chicago

50

50

55

5

300

50

San Antonio

75

5

80

75

400

40

New York

10

70

120

15

450

100

Portland

105

100

15

30

250

300

Birmingham

65

10

95

70

500

150

Syracuse

0

90

130

15

485

150

Seattle

110

110

25

25

220

100

San Francisco

100

85

10

45

200

310

New Demand

(1,000)

180

30

85

51

200

Assume that the firm's objective is to minimize the sum of total variable production costs and transportation costs. (Note that the transportation costs are in cents per gal- lon, while the variable production costs are in dollars per gallon.)

a. Formulate and solve an LP problem that involves the first option for expansion.

b. Formulate and solve an LP problem that involves the second option for expansion.

c. Formulate and solve an LP problem that involves the third option for expansion.

d. Based on the results of parts a, b, and c, which of the three options would you recommend?

Reference no: EM13879177

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