Given this linear programming model, solve the model and then answer the questions that follow. Maximize Z = 12x1 + 18x2 + 15x3 where x1 = the quantity of product 1 to make, etc. Subject to Machine: 5x 1 + 4x 2 + 3x 3 ≤ 160 minutes Labor: 4x1 + 10x2 + 4x3 ≤ 288 hours Materials: 2x 1 + 2x2 + 4x3 ≤ 200 pounds Product 2: x2 ≤ 16 units x1, x2, x3 ≥ 0 a) Are any constraints binding? If so, which one(s)? b) If the profit on product 3 were changed to $22 a unit, what would the values of the decision variables be? The objective function? Explain. c) If the profit on product 1 were changed to $22 a unit, what would the values of the decision variables be? The objective function? Explain.

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter4: Linear Programming Models
Section: Chapter Questions
Problem 73P
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Given this linear programming model, solve the model and then answer the questions that follow.
Maximize Z = 12x1 + 18x2 + 15x3 where x1 = the quantity of product 1 to make,
etc.
Subject to
Machine: 5x 1 + 4x 2 + 3x 3 ≤ 160 minutes
Labor: 4x1 + 10x2 + 4x3 ≤ 288 hours
Materials: 2x 1 + 2x2 + 4x3 ≤ 200 pounds
Product 2: x2 ≤ 16 units
x1, x2, x3 ≥ 0
a) Are any constraints binding? If so, which one(s)?
b) If the profit on product 3 were changed to $22 a unit, what would the values of the decision
variables be? The objective function? Explain.
c) If the profit on product 1 were changed to $22 a unit, what would the values of the decision
variables be? The objective function? Explain.
d) If 10 hours less of labor time were available, what would the values of the decision variables
be? The objective function? Explain.
e) If the manager decided that as many as 20 units of product 2 could be produced (instead of
16), how much additional profit would be generated?
f) If profit per unit on each product increased by $1, would the optimal values of the decision
variables change? Explain. What would the optimal value of the objective function be?

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