Excel Exercise Week 2 complete solutions correct answers key

On the tab labeled “Original Problem”, I have provided the modeling of Problem #17 in Chapter 3.    Carefully read the statement of the problem in the textbook and then review the model to familiarize yourself with the integration of the LP into Excel.   Reference the ‘Par.xls’ example from the text.

First requirement is to fill in the formulas in the GREEN cells for the Objective function and the constraints.  There is no need to change the values in the RED cells.

Next, load the solver by filling in the ‘Set Target Cell‘, ‘By Changing Cells‘, and ‘Subject to the Constraints‘ boxes.

Once you have loaded the solver and solved the problem, you are required to obtain the sensitivity analysis.  If you do this correctly, the ‘Sensitivity Report’ will show up in a new tab in the bottom of the sheet.

From there, proceed to the Solutions tab where you will find five questions.  To answer each question, you will be required to consult the sensitivity analysis and locate the correct information from the analysis to answer each question.  All answers should come from solving the model (after loading the solver) and obtaining and consulting the sensitivity data, not by resolving the model multiple times!

In your response to each question, you should begin with a written sentence(s) that explains where specifically in the sensitivity analysis you found the information you need to answer each question followed by a sentence answering each respective question.  Each question is worth 20 points:  10 points for explaining where in the sensitivity analysis you found the information necessary to answer the question (mechanical component) and 10 points for a clear, concise, grammatically correct answer to the question (written component).  Questions should be answered on the Solutions tab and typed in unbolded print right after the statement of the question. 

Good luck, and HAVE FUN!

Porsche Club

DRB

DRW

Number to Make

0

0

Total Profit

Unit Profits

$200

$280

　

Constraints

Used

Available

Steel available

20

25

　

40,000

Manufacturing minutes

40

100

　

120,000

Assembly minutes

60

40

　

96,000

Question 1 (20 Points):  What are the optimal solution and the total profit?

Question 2 (20 Points):  If the unit profit of the DRW decreases to $260 per unit, how would the optimal solution change?

Question 3 (20 Points):  How much should the company be willing to pay to acquire additional capacity in the ‘Assembly minutes’ area?  Explain in detail.

Question 4 (20 Points):  How much should the company be willing to pay to acquire additional ‘Steel’?  Explain in detail.

Question 5 (20 Points):  How much will the objective function, ‘Total Profit’, change if there was one additiional hour of Manufacturing capacity available?