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Tutorial 10:
 Performing What-If Analyses

Microsoft Office Excel 2010
         ®             ®
Visual Overview                      XP




New Perspectives on Microsoft Excel 2010        2
Data Tables and What-If Analysis XP




New Perspectives on Microsoft Excel 2010    3
Understanding Cost-Volume-Profit               XP
      Relationships
      • Cost-volume-profit (CVP) analysis
         – Studies the relationship between expenses,
           sales volume, and profitability
         – Helps predict the effect of cutting overhead
           or raising prices on a company’s net income
         – Sometimes called break-even analysis




New Perspectives on Microsoft Excel 2010                  4
Comparing Expenses and Revenue
                                   XP


      • Types of expenses
         – Variable expenses change in proportion to
           the amount of business a company does
         – Fixed expense must be paid regardless of
           sales volume
         – Mixed expense is part variable and part
           fixed



New Perspectives on Microsoft Excel 2010               5
Determining the Break-Even Point
                                     XP


      • Break-even point: revenue equals expenses
      • A CVP chart shows the relationship between
        expenses and revenue




New Perspectives on Microsoft Excel 2010             6
Performing a What-If Analysis with                    XP
      Goal Seek
      • What-if analysis lets you explore the impact of
        changing different values in a worksheet
      • Goal Seek automates trial-and-error process
         – Allows you to specify a value for a calculated item
         – Excel returns input value needed to reach the goal
         – Goal Seek dialog box




New Perspectives on Microsoft Excel 2010                         7
Performing a What-If Analysis with   XP
      Goal Seek




New Perspectives on Microsoft Excel 2010        8
Working with Data Tables                                     XP


      • Display results from several what-if analyses
      • One-variable data table
             – Specify one input cell and any number of result
               cells
             – Useful in business to explore how changing a
               single input cell can impact several result cells




New Perspectives on Microsoft Excel 2010                                9
Charting a One-Variable Data Table
                                       XP


      • Gives a better picture of relationship between
        sales volume, revenue, and total expenses




New Perspectives on Microsoft Excel 2010                 10
Creating a Two-Variable Data Table               XP


      • Analyzes a variety of combinations
        simultaneously
      • Uses two input cells, but displays only a single
        result value
      • Must identify the row input cell and the
        column input cell




New Perspectives on Microsoft Excel 2010                    11
Creating a Two-Variable Data Table   XP




New Perspectives on Microsoft Excel 2010        12
Charting a Two-Variable Data Table
                                       XP




New Perspectives on Microsoft Excel 2010    13
Visual Overview                      XP




New Perspectives on Microsoft Excel 2010        14
What-If Scenarios                    XP




New Perspectives on Microsoft Excel 2010        15
Using the Scenario Manager                      XP


      • Create scenarios to perform a what-if analysis
        with more than two input cells
      • Define names for all input and result cells that
        you intend to use in the analysis
         – Defined names automatically appear in
           reports generated by the Scenario Manager
         – Using defined names makes it easier to
           work with scenarios and understand the
           scenario reports

New Perspectives on Microsoft Excel 2010                   16
Using the Scenario Manager                     XP


      • Use the Scenario Manager to define scenarios
         – Each scenario includes a scenario name,
           input cells, and values for each input cell
         – Number of scenarios is limited only by
           computer’s memory
      • Input cells are referred to as changing cells
         – Contain values that are changed under the
           scenario
         – Can be located anywhere in the worksheet
New Perspectives on Microsoft Excel 2010                  17
Using the Scenario Manager           XP


      • Edit Scenario dialog box




New Perspectives on Microsoft Excel 2010        18
Using the Scenario Manager           XP


      • Scenario Values dialog box




New Perspectives on Microsoft Excel 2010        19
Using the Scenario Manager                      XP


      • View the effect of each scenario by selecting it
        in the Scenario Manager dialog box




New Perspectives on Microsoft Excel 2010                   20
Using the Scenario Manager                      XP


      • Editing a Scenario
         – Edit the assumptions to view other
           possibilities
         – Worksheet calculations are automatically
           updated to reflect the new scenario




New Perspectives on Microsoft Excel 2010                   21
Creating a Scenario Summary Report XP
      • Displays the values of the input cells and
        result cells under each scenario
      • Tabular layout makes it simpler to compare
        results of each scenario
      • Automatic formatting makes it useful for
        reports and meetings




New Perspectives on Microsoft Excel 2010             22
Scenario Summary Report              XP




New Perspectives on Microsoft Excel 2010        23
Creating a Scenario PivotTable Report
                                          XP


      • Displays results from each scenario as a pivot
        field in a PivotTable




New Perspectives on Microsoft Excel 2010                 24
Creating a Scenario PivotTable Report
                                          XP


      • Results for the table can be displayed in a
        PivotChart




New Perspectives on Microsoft Excel 2010              25
Visual Overview                      XP




New Perspectives on Microsoft Excel 2010        26
Using Solver                         XP




New Perspectives on Microsoft Excel 2010        27
Understanding Price Elasticity of        XP
      Demand
      • Point of maximum revenue occurs somewhere
        between lowest and highest sales price
      • Demand and revenue as functions of price




New Perspectives on Microsoft Excel 2010            28
Understanding Price Elasticity of               XP
      Demand
      • Elasticity
         – Effect of one financial variable upon
           another
      • Price elasticity of demand
         – Effect that price has on demand

      • Elasticity measures are always expressed as
        positive values

New Perspectives on Microsoft Excel 2010                   29
Price Elasticity of Demand                                               XP

      • Relatively inelastic                   • Perfectly elastic
             – Price elasticity of demand is      – Large elasticity values
               less than 1                        – Any change in price causes a
             – Large changes in price cause         huge change in demand
               small changes in demand         • Unit elastic
      • Perfectly inelastic                       – Elasticity equals 1.0
             – Elasticity equals 0                – Any change in price is met by
             – Changes in price have no             an equal and opposite change
               impact on demand                     in demand
      • Relatively elastic
             – Price elasticity of demand is
               greater than 1
             – Demand is very responsive to
               changes in price

New Perspectives on Microsoft Excel 2010                                            30
Maximizing Net Income Through Trial
                                        XP
      and Error


      • Using the trial and error process can be very
        time-consuming if you have a large range of
        possible values




New Perspectives on Microsoft Excel 2010                31
Finding an Optimal Solution Using    XP
      Solver
      • Solver searches for the
        optimal solution to a
        problem involving
        several variables
      • Arrives at optimal
        solutions through an
        iterative procedure
      • Because it is an add-in,
        Solver might need to be
        activated


New Perspectives on Microsoft Excel 2010        32
Setting Up Solver to Find a Solution    XP


      • Specify three Solver parameters
             – Objective cell
             – Variable (or changing) cells
             – Constraints




New Perspectives on Microsoft Excel 2010           33
Setting Up Solver Constraints                 XP


      • Constraints confine the solution within a
        reasonable set of defined limits
      • Constraints supported by Solver
         – <=, >=, and =
         – integer or int
         – binary or bin
         – dif or AllDifferent


New Perspectives on Microsoft Excel 2010                 34
Setting Up Solver Constraints        XP


      • Add Constraint dialog box




New Perspectives on Microsoft Excel 2010        35
Setting Up Solver Constraints              XP


      • Completed Solver Parameters dialog box




New Perspectives on Microsoft Excel 2010              36
Creating a Solver Answer Report               XP


      • Solver can create three different reports
             – Answer report (the most useful)
             – Sensitivity report
             – Limits report




New Perspectives on Microsoft Excel 2010                 37
Sections of a Solver Answer Report
                                      XP


      • Titles
      • Information about the objective cell: location,
        cell label, and cell’s original value and final
        values
      • Information about the changing cells (variable
        cells): location, column and row label, original
        value, and final value of each cell
      • Information about the constraints: not
        binding and binding, and slack

New Perspectives on Microsoft Excel 2010                   38
Creating a Solver Answer Report      XP




New Perspectives on Microsoft Excel 2010        39
Choosing a What-If Analysis Tool                                                    XP


      Data tables            • To perform several what-if analyses involving one or two
                               input cells and to display analysis in a tabular format
                             • Easily displayed as charts
      Create a               • For what-if analyses involving more than two input cells
      scenario               • Scenario summary tables and scenario PivotTables can be
                               used to obtain a quick snapshot of several possible
                               outcomes
                             • Scenarios can be merged and shared among several
                               workbooks
      Solver                 • To maximize or minimize a value (provide a single solution or
                               “best outcome”)
                             • To set a calculated cell to a specific value
      Goal Seek              • If you don’t need to specify any constraints on your solution

New Perspectives on Microsoft Excel 2010                                                       40
Saving and Loading Solver ModelsXP
      • Save parameters in cells in the worksheet
             – Reload the parameters from the worksheet cells
               without having to reformulate the problem
             – Create dozens of models that you can load and
               apply to your analysis as new data is entered
      • Load/Save Model dialog box




New Perspectives on Microsoft Excel 2010                        41
Saving and Loading Solver ModelsXP
      • Saved Solver model




New Perspectives on Microsoft Excel 2010   42

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Tutorial 10: Performing What-IF Analyses

  • 1. Tutorial 10: Performing What-If Analyses Microsoft Office Excel 2010 ® ®
  • 2. Visual Overview XP New Perspectives on Microsoft Excel 2010 2
  • 3. Data Tables and What-If Analysis XP New Perspectives on Microsoft Excel 2010 3
  • 4. Understanding Cost-Volume-Profit XP Relationships • Cost-volume-profit (CVP) analysis – Studies the relationship between expenses, sales volume, and profitability – Helps predict the effect of cutting overhead or raising prices on a company’s net income – Sometimes called break-even analysis New Perspectives on Microsoft Excel 2010 4
  • 5. Comparing Expenses and Revenue XP • Types of expenses – Variable expenses change in proportion to the amount of business a company does – Fixed expense must be paid regardless of sales volume – Mixed expense is part variable and part fixed New Perspectives on Microsoft Excel 2010 5
  • 6. Determining the Break-Even Point XP • Break-even point: revenue equals expenses • A CVP chart shows the relationship between expenses and revenue New Perspectives on Microsoft Excel 2010 6
  • 7. Performing a What-If Analysis with XP Goal Seek • What-if analysis lets you explore the impact of changing different values in a worksheet • Goal Seek automates trial-and-error process – Allows you to specify a value for a calculated item – Excel returns input value needed to reach the goal – Goal Seek dialog box New Perspectives on Microsoft Excel 2010 7
  • 8. Performing a What-If Analysis with XP Goal Seek New Perspectives on Microsoft Excel 2010 8
  • 9. Working with Data Tables XP • Display results from several what-if analyses • One-variable data table – Specify one input cell and any number of result cells – Useful in business to explore how changing a single input cell can impact several result cells New Perspectives on Microsoft Excel 2010 9
  • 10. Charting a One-Variable Data Table XP • Gives a better picture of relationship between sales volume, revenue, and total expenses New Perspectives on Microsoft Excel 2010 10
  • 11. Creating a Two-Variable Data Table XP • Analyzes a variety of combinations simultaneously • Uses two input cells, but displays only a single result value • Must identify the row input cell and the column input cell New Perspectives on Microsoft Excel 2010 11
  • 12. Creating a Two-Variable Data Table XP New Perspectives on Microsoft Excel 2010 12
  • 13. Charting a Two-Variable Data Table XP New Perspectives on Microsoft Excel 2010 13
  • 14. Visual Overview XP New Perspectives on Microsoft Excel 2010 14
  • 15. What-If Scenarios XP New Perspectives on Microsoft Excel 2010 15
  • 16. Using the Scenario Manager XP • Create scenarios to perform a what-if analysis with more than two input cells • Define names for all input and result cells that you intend to use in the analysis – Defined names automatically appear in reports generated by the Scenario Manager – Using defined names makes it easier to work with scenarios and understand the scenario reports New Perspectives on Microsoft Excel 2010 16
  • 17. Using the Scenario Manager XP • Use the Scenario Manager to define scenarios – Each scenario includes a scenario name, input cells, and values for each input cell – Number of scenarios is limited only by computer’s memory • Input cells are referred to as changing cells – Contain values that are changed under the scenario – Can be located anywhere in the worksheet New Perspectives on Microsoft Excel 2010 17
  • 18. Using the Scenario Manager XP • Edit Scenario dialog box New Perspectives on Microsoft Excel 2010 18
  • 19. Using the Scenario Manager XP • Scenario Values dialog box New Perspectives on Microsoft Excel 2010 19
  • 20. Using the Scenario Manager XP • View the effect of each scenario by selecting it in the Scenario Manager dialog box New Perspectives on Microsoft Excel 2010 20
  • 21. Using the Scenario Manager XP • Editing a Scenario – Edit the assumptions to view other possibilities – Worksheet calculations are automatically updated to reflect the new scenario New Perspectives on Microsoft Excel 2010 21
  • 22. Creating a Scenario Summary Report XP • Displays the values of the input cells and result cells under each scenario • Tabular layout makes it simpler to compare results of each scenario • Automatic formatting makes it useful for reports and meetings New Perspectives on Microsoft Excel 2010 22
  • 23. Scenario Summary Report XP New Perspectives on Microsoft Excel 2010 23
  • 24. Creating a Scenario PivotTable Report XP • Displays results from each scenario as a pivot field in a PivotTable New Perspectives on Microsoft Excel 2010 24
  • 25. Creating a Scenario PivotTable Report XP • Results for the table can be displayed in a PivotChart New Perspectives on Microsoft Excel 2010 25
  • 26. Visual Overview XP New Perspectives on Microsoft Excel 2010 26
  • 27. Using Solver XP New Perspectives on Microsoft Excel 2010 27
  • 28. Understanding Price Elasticity of XP Demand • Point of maximum revenue occurs somewhere between lowest and highest sales price • Demand and revenue as functions of price New Perspectives on Microsoft Excel 2010 28
  • 29. Understanding Price Elasticity of XP Demand • Elasticity – Effect of one financial variable upon another • Price elasticity of demand – Effect that price has on demand • Elasticity measures are always expressed as positive values New Perspectives on Microsoft Excel 2010 29
  • 30. Price Elasticity of Demand XP • Relatively inelastic • Perfectly elastic – Price elasticity of demand is – Large elasticity values less than 1 – Any change in price causes a – Large changes in price cause huge change in demand small changes in demand • Unit elastic • Perfectly inelastic – Elasticity equals 1.0 – Elasticity equals 0 – Any change in price is met by – Changes in price have no an equal and opposite change impact on demand in demand • Relatively elastic – Price elasticity of demand is greater than 1 – Demand is very responsive to changes in price New Perspectives on Microsoft Excel 2010 30
  • 31. Maximizing Net Income Through Trial XP and Error • Using the trial and error process can be very time-consuming if you have a large range of possible values New Perspectives on Microsoft Excel 2010 31
  • 32. Finding an Optimal Solution Using XP Solver • Solver searches for the optimal solution to a problem involving several variables • Arrives at optimal solutions through an iterative procedure • Because it is an add-in, Solver might need to be activated New Perspectives on Microsoft Excel 2010 32
  • 33. Setting Up Solver to Find a Solution XP • Specify three Solver parameters – Objective cell – Variable (or changing) cells – Constraints New Perspectives on Microsoft Excel 2010 33
  • 34. Setting Up Solver Constraints XP • Constraints confine the solution within a reasonable set of defined limits • Constraints supported by Solver – <=, >=, and = – integer or int – binary or bin – dif or AllDifferent New Perspectives on Microsoft Excel 2010 34
  • 35. Setting Up Solver Constraints XP • Add Constraint dialog box New Perspectives on Microsoft Excel 2010 35
  • 36. Setting Up Solver Constraints XP • Completed Solver Parameters dialog box New Perspectives on Microsoft Excel 2010 36
  • 37. Creating a Solver Answer Report XP • Solver can create three different reports – Answer report (the most useful) – Sensitivity report – Limits report New Perspectives on Microsoft Excel 2010 37
  • 38. Sections of a Solver Answer Report XP • Titles • Information about the objective cell: location, cell label, and cell’s original value and final values • Information about the changing cells (variable cells): location, column and row label, original value, and final value of each cell • Information about the constraints: not binding and binding, and slack New Perspectives on Microsoft Excel 2010 38
  • 39. Creating a Solver Answer Report XP New Perspectives on Microsoft Excel 2010 39
  • 40. Choosing a What-If Analysis Tool XP Data tables • To perform several what-if analyses involving one or two input cells and to display analysis in a tabular format • Easily displayed as charts Create a • For what-if analyses involving more than two input cells scenario • Scenario summary tables and scenario PivotTables can be used to obtain a quick snapshot of several possible outcomes • Scenarios can be merged and shared among several workbooks Solver • To maximize or minimize a value (provide a single solution or “best outcome”) • To set a calculated cell to a specific value Goal Seek • If you don’t need to specify any constraints on your solution New Perspectives on Microsoft Excel 2010 40
  • 41. Saving and Loading Solver ModelsXP • Save parameters in cells in the worksheet – Reload the parameters from the worksheet cells without having to reformulate the problem – Create dozens of models that you can load and apply to your analysis as new data is entered • Load/Save Model dialog box New Perspectives on Microsoft Excel 2010 41
  • 42. Saving and Loading Solver ModelsXP • Saved Solver model New Perspectives on Microsoft Excel 2010 42