The XYZ Company plans to allocate some or all of its monthly advertising budget of $75,000...

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Operations Management

The XYZ Company plans to allocate some or all of its monthlyadvertising budget of $75,000 in the area. It can purchase localradio spots at $120 per spot, local TV spots at $500 per spot, andlocal newspaper advertising at $260 per insertion.

     The company's policy requirementsspecify that the company must spend at least $30,000 on TV andallow monthly newspaper expenditures up to $15,000. The company’sinternal policy also requires that the company must buy at least100 radio spots.

The payoff from each advertising medium is a function of thesize of its audience. The general experience of the firm is thatthe values of insertions and spots in terms of \"audience points\"(arbitrary unit), are as given below:

       ---------------------------------------------------------------------------

        Radio                           150 audience points perspot

        TV                              180 audiencepoints per spot

        Newspapers                  280audience points per insertion

       ---------------------------------------------------------------------------

Let x1 = no. of Radio spots to be purchased,

        X2 = no. of TV spotsto be purchased, and

        X3= no. of Newspaperinsertions.

Max    150x1+ 180x2 + 280x3

s.t.

      (1)     120x1 + 500x2 + 260x3 <= 75,000    (Advertising Budget)

     (2)                     500x2                 ≥ 30000     (Expenditure on TV)

         (3)                                     260x3<= 15000      (Expenditure onNewspaper)

          (4)                 x1                           ≥   100        (Number of radiospots)

             X1, x2, x3 >= 0

LINEAR PROGRAMMING PROBLEM

MAX 150X1+ 180X2 + 280X3

Subject to:

  1. 120X1 + 500X2 + 260X3 < 75000
  2. 500X2 > 30000
  3. 260X3 < 15000
  4. 1X1 > 100

      OPTIMAL SOLUTION

      Objective Function Value=       67050.000

               Variable                  Value                  ReducedCosts

             -------------                ---------               --------------------

                 

                   X1                       375.000                    0.000

                   X2                         60.000                    0.000

                   X3                           0.000                  45.000

              Constraint              Slack/Surplus           Dual Prices

            ---------------           -------------------         ---------------

                     1                            0.000                         1.250

                     2                            0.000                       - 0.89

                     3                    15000.000                         0.000

                     4                        275.000                         0.000

    

                            

  OBJECTIVE COEFFICIENT RANGES

     Variable              Lower Limit         CurrentValue           Upper Limit

  ---------------          ------------------     -------------------     ----------------------

           X1                           129.231                  150.000          No Upper Limit

           X2                No LowerLimit                180.000                       625.000

           X3                No LowerLimit                280.000                       325.000

RIGHT HAND SIDE RANGES

      Variable              Lower Limit         CurrentValue           Upper Limit

  ---------------          ------------------     -------------------     ----------------------

           1                       42000.000              75000.000          No Upper Limit

           2                               0.000              30000.000                   63000.000

           3                               0.000              15000.000          No Upper Limit

           4                No LowerLimit                100.000                       375.000

1. Which constraint(s) is/are binding (active)?

2. Interpret the dual price of 1.25 for Constraint1.

Answer & Explanation Solved by verified expert
4.3 Ratings (629 Votes)
1 Binding constraints are thoseconstraints where the slack or surplus is 0 We can see from belowtable that out of the 4 constraints Constraint 1 and    See Answer
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