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In: Advanced Math

Problem 3-12 (Algorithmic) Quality Air Conditioning manufactures three home air conditioners: an economy model, a standard...

Problem 3-12 (Algorithmic)

Quality Air Conditioning manufactures three home air conditioners: an economy model, a standard model, and a deluxe model. The profits per unit are $57, $93, and $141, respectively. The production requirements per unit are as follows:

Number of
Fans
Number of
Cooling Coils
Manufacturing
Time (hours)
Economy 1 1 8
Standard 1 2 12
Deluxe 1 4 14

For the coming production period, the company has 320 fan motors, 380 cooling coils, and 3200 hours of manufacturing time available. How many economy models (E), standard models (S), and deluxe models (D) should the company produce in order to maximize profit? The linear programming model for the problem is as follows:

Max 57E + 93S + 141D
s.t.
1E + 1S + 1D 320   Fan motors
1E + 2S + 4D 380   Cooling coils
8E + 12S + 14D 3200   Manufacturing time
E, S, D ≥ 0

The computer solution is shown in the figure below.

Optimal Objective Value =      20400.00000
Variable Value Reduced Cost
E 260.00000 0.00000
S 60.00000 0.00000
D 0.00000 24.00000
Constraint Slack/Surplus Dual Value
1 0.00000 21.00000
2 0.00000 36.00000
3 400.00000 0.00000
Variable Objective
Coefficient
Allowable
Increase
Allowable
Decrease
E 57.00000 12.00000 10.50000
S 93.00000 21.00000 8.00000
D 141.00000 24.00000 Infinite
Constraint RHS
Value
Allowable
Increase
Allowable
Decrease
1 320.00000 60.00000 130.00000
2 380.00000 100.00000 60.00000
3 3200.00000 Infinite 400.00000
  1. What is the optimal solution, and what is the value of the objective function? If required, round your answers to the nearest whole number. If your answer is zero, enter "0".
    Optimal Solution
    Economy models (E)
    Standard models (S)
    Deluxe models (D)
    Value of the objective function $  
  2. Which constraints are binding?
    Fan motors:
    Cooling coils:
    Manufacturing time:
  3. Which constraint shows extra capacity? How much? If constraint shows no extra capacity, enter 0 as number of units. If required, round your answers to the nearest whole number.
    Constraints Extra capacity Number of units
    Fan motors
    Cooling coils
    Manufacturing time
  4. If the profit for the deluxe model were increased to $156 per unit, would the optimal solution change?

    The optimal solution   change because the profit of the deluxe model can vary from   to  . $156 is   this range without the optimal solution changing.

Solutions

Expert Solution


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