Quality Air Conditioning manufactures three home air conditioners: an economy model, a standard model, and a deluxe model. The profits per unit are $67, $95, and $133, 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 300 fan motors, 340 cooling coils, and 2000 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 67E + 95S + 133D       s.t.     1E + 1S + 1D ≤ 300   Fan motors   1E + 2S + 4D ≤ 340   Cooling coils   8E + 12S + 14D ≤ 2000   Manufacturing time E, S, D ≥ 0       The computer solution is shown in the figure below.   Optimal Objective Value =      17380.00000       Variable   Value   Reduced Cost       E   180.00000   0.00000       S   0.00000   9.00000       D   40.00000   0.00000         Constraint   Slack/Surplus   Dual Value       1   80.00000   0.00000       2   0.00000   7.00000       3   0.00000   7.50000             Variable   Objective Coefficient   Allowable Increase   Allowable Decrease       E   67.00000   9.00000   8.10000       S   95.00000   9.00000   Infinite       D   133.00000   135.00000   15.75000         Constraint   RHS Value   Allowable Increase   Allowable Decrease       1   300.00000   Infinite   80.00000       2   340.00000   231.42860   90.00000       3   2000.00000   480.00000   810.00000     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) 180 Standard models (S) 0 Deluxe models (D) 40 Value of the objective function $  17380 Which constraints are binding? Fan motors: non binding Cooling coils: binding Manufacturing time: binding 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. 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 yes ? Cooling coils no 0 Manufacturing time no 0

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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Quality Air Conditioning manufactures three home air conditioners: an economy model, a standard model, and a deluxe model. The profits per unit are $67, $95, and $133, 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 300 fan motors, 340 cooling coils, and 2000 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 67E + 95S + 133D      
s.t.  
  1E + 1S + 1D 300   Fan motors
  1E + 2S + 4D 340   Cooling coils
  8E + 12S + 14D 2000   Manufacturing time
ESD ≥ 0  
 

 

The computer solution is shown in the figure below.

 

Optimal Objective Value =      17380.00000
 
    Variable   Value   Reduced Cost  
    E   180.00000   0.00000  
    S   0.00000   9.00000  
    D   40.00000   0.00000  
 
    Constraint   Slack/Surplus   Dual Value  
    1   80.00000   0.00000  
    2   0.00000   7.00000  
    3   0.00000   7.50000  
 

 

 

    Variable   Objective
Coefficient
  Allowable
Increase
  Allowable
Decrease
 
    E   67.00000   9.00000   8.10000  
    S   95.00000   9.00000   Infinite  
    D   133.00000   135.00000   15.75000  
 
    Constraint   RHS
Value
  Allowable
Increase
  Allowable
Decrease
 
    1   300.00000   Infinite   80.00000  
    2   340.00000   231.42860   90.00000  
    3   2000.00000   480.00000   810.00000  
 
  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) 180
    Standard models (S) 0
    Deluxe models (D) 40
    Value of the objective function $  17380
  2. Which constraints are binding?

    Fan motors:
    non binding
    Cooling coils:
    binding
    Manufacturing time:
    binding
  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.
  1. 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
    yes
    ?
    Cooling coils
    no
    0
    Manufacturing time
    no
    0
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ISBN:
9781337406659
Author:
WINSTON, Wayne L.
Publisher:
Cengage,