DAY 9: MICROSOFT EXCEL – CHAPTER 6 Sravanthi Lakkimsetty Sept 16, 2015

ANNOUNCEMENTS Homework 2 is due on this Friday, 18 Sept. Homework # 3 will be uploaded onto my website today and it is due on 25 Sept.

GOAL SEEK Goal seek is a tool that identifies the necessary input value to obtain a desired goal. To use Goal Seek: Click What If Analysis ->Goal seek in Data Tab. Enter the cell reference for the cell to be optimized in the Set Cell box (Set cell box  B7) Enter the result you want to achieve(Enter 70 in To Value box) Enter the cell reference that contains the variable to adjust. (By changing cell box  B2) Click Ok to accept the solution. 3

SCENARIO MANAGER Scenario is a set of values that represent a possible situation. Scenarios are needed to analyze multiple variables and their combined effect on multiple calculated results. Scenario manager enables you to define and manage scenarios to compare how they affect results. It is basically a What-If Analysis Tool 4

USING SCENARIO MANAGER Create and edit Scenarios View Scenarios Generate Scenario Summary Report 5

CREATE A SCENARIO Before starting Scenario Manager, Identify the range of cells that contain the variables that you need to manipulate. Click What-If Analysis -> Scenario manager in Data Tab Click Add to add a new Scenario. Give a Scenario name : No reservation fee Changings cell : B1:B3 Enter : $0 in $B$1, $50 in $B$2, 50 in $B$3. Create Additional Scenarios by clicking Add Give another Scenario name : Most likely case Changings cell : B1:B3 Enter : $200 in $B$1, $10 in $B$2, 20 in $B$3. 6

VIEW SCENARIOS To view your Scenarios, click What-If Analysis in the Data Tab and select Scenario Manager. Select the name of the Scenario that you would like to view and click Show.

CREATE A SCENARIO SUMMARY REPORT To compare all the scenarios in a table, we use a Scenario Summary Report. It is an organized table of scenarios and their I nput values and their respective results. To obtain that: Select What-If Analysis  Scenario manager  Summary Result cells box : Range B12:B14 Click OK 8

SOLVER Add-ins are programs that can be added to Excel to provide enhanced functionality. Solver is an Add-in application that searches for the best and optimum solution to a problem by manipulating the values of several variables within restrictions you impose

HOW TO LOAD SOLVER ADD IN Click the File Tab and select options. Click Add-ins to see a list of active and inactive add ins Click the Manage Arrow, select the Excel Add-ins and then go to open the Add-Ins dialog box. Click the Solver Add-in check box in the Add-Ins available list and click ok.

SOLVER SUCCESSFULLY LOADED? How will you know that it is loaded successfully? Check it under Analysis Group in Data Tab.

TO OPTIMIZE RESULTS WITH SOLVER We need to specify three parameters in Solver: Objective Cell: It specifies the cell that contains a formula that produces a value that you want to optimize by manipulating other variables. Changing Variable Cells: The cells containing variables whose values change within the constraints until the objective reaches its optimum value. Constraints: Specify the restrictions or limitations imposed on a spreadsheet model.

EXAMPLE Set the Objective as the cell that we need to optimize.(B4) Set the Option in the To Section to specify what type of value you need to find for the target cell.(Select Min for the Budget) Enter the cell references that you wish to change (B1:B3) Give constraints if any on the variables by clicking on Add. Accept the default solving method i.e. GRG Non Linear.

EXAMPLE…. Click Solve to being optimizing. When the Solver completes the iterative process, it shows a dialog box with results. If it finds a solution, then the Reports list shows available report types. Else, no reports are available. Keep solver Solution – To keep the changed objective and variable values Restore Original Values - to return to the original values in the worksheet.

EXAMPLE…. Select a Report type from the list for generating an appropriate detailed Report on the changes that the solver has done. Click OK. This creates a detailed report in a new Worksheet.