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**Excel Tutorials (MS Excel 2003)**

Excel Basics Data Analysis Solver XLSim Tornado Diagram

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Excel Basics

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**Excel tutorial: Excel Information**

Excel training offered by University Computing Service: Excel handbooks available in JBS Computer Lab On-Line excel tutorials: Book available from JBS library B.V. Liengme, A Guide to Microsoft Excel for Scientists and Engineers, Arnold Publisher, London 1997.

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**Excel tutorial: Some tips**

Separate data, model (containing many formulas), and results Ensure that you document and organize your models properly so that others can easily understand your model and repeat your experiments in the future Use absolute and relative references but not use any numbers in formulas Ensure the model is scalable so that you can modify it easily Validate your models carefully Use Excel building functions such as SUMPRODUCT Use DATA TABLE which allows you to repeatedly evaluate a particular formula within the model while systematically varying one or two input cells on which the formula depends

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**Excel tutorial: Some basic Excel functions**

FILLDOWN for editing efficiency RELATIVE and ABSOLUTE REFERENCE for creating formulas IF for logical computations SUM, MAX, MIN for computations SUMPRODUCT for scaling-free calculations RAND, RANDBETWEEN for simulation DATA TABLE for parametric calculation/simulation HLOOPUP, VLOOKUP for sampling

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**Excel tutorial: Data Table**

Create a table with values of the parameter in one column, say A2:A101 and copy the value of the output in B1 Select/highlight the whole table A1:B101 Invoke DataData Table from Excel menu and you get a dialogue box Select column input cell, and click the input parameter cell, and then click OK. You get the whole data table WARNING: In order for Data Table to work, ensure that option Automatic in ToolsOptionsCalculation is ticked. You could have a Data Table without a parameter in simulation or a Data Table with two parameters in a data table matrix. In the former, you need to choose an empty cell for the column input cell and in the latter, you need to correctly choose cells for both column input cell and row input cell.

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Excel Data Analysis

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**Excel tutorial: Install Analysis ToolPak**

Open Excel Go to ToolsAdd-Ins, tick Analysis ToolPak, and then click OK Data Analysis will appear in your Tools menu You may need the computer installation CD to finish this task

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**Excel tutorial: Create a histogram (frequency table)**

Open Excel with your data Create bins, say, 0, 2500, 5000, ..., 7500, ... arranged in a column Go to ToolsData Analysishistogram. You get a dialogue window In Input Range: Select all data area. To highlight or select a whole rectangular area (control-shift and right-arrow to populate the row, control-shift and down-arrow to populate the column) In Bin Range: Select the bin range Output options: Select new workbook and chart output for charts too Click OK

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Excel Solver

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**Excel tutorial: Install Solver Open Excel Install Solver:**

Tools->Add-Ins->Solver Add-In->OK You will see Solver in Tools menu

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**Solver- design and build models**

Excel tutorial: Solver- design and build models Arrange data Allocate Change Cell Allocate Target Cell Allocate Constraint Cells Assign proper tags Add proper comments Add proper colours

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**Excel tutorial: Link to Solver Go to Tools->Solver Set Target Cell**

Equal To By Changing Cells Subject to the Constraints: Add, Change, Delete Set Solver Options

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**Solver Options and Solution Reports**

Excel tutorial: Solver Options and Solution Reports Max Time Iterations Tolerance Assume Linear Model Use Automatic Scaling Assume Non-Negative

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Excel tutorial: View Solver Reports Answer Sensitivity Limits

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**Excel tutorial: Solver Enhancements**

Insert names: Highlight the area and then insert name SUMPRODUCT(row_variables, row_constraint_i) Add comments and proper tags

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Excel XLSim

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**Excel tutorial: Install XLSim**

Download XLSim from or install XLSim from the CD of the book of Sam Savage: Decision Making with Insight Installation is accomplished by running Setup.exe Launch Excel Open XLSim.xla from File menu of Excel Select Tools Add-Ins and then select XLSim. You should see Simulate on your Excel menu. If it does not, it won’t work You may also need to (1) Copy XLSim.xla into Excel Library or MSOffice\Library directory (2) Copy SIM5016.DLL and SIM5032.DLL to Windows\System directory

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**Excel tutorial: Conduct simulation**

Go to Simulate Simulation (You are given an editing window) Add outputs Choose simulation size Click OK You get another worksheet called Statistic Go to Simulate Graphs Choose Bin Size for histograms Click histogram to generate a histogram Click cumulative to generate a CD graph

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**Excel tutorial: Parametric simulation**

Determine which parameter for your sensitivity analysis Select a few values for your parameter and store them in your worksheet Go to Simulate Parameterized Sim You get a new dialog window Select your output cell and give a name Select the number of trials Select the parameter cell used in your model Give a name for your parameter Select a range of values for your parameter that you stored before Save this parametric simulation in a cell

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**Excel tutorial: Parametric simulation**

You can save and load parametric simulations After creating or loading a parametric simulation, click OK for experiments Go to Simulate Common Graphs in order to plot either histograms or CD graphs in one diagram. You could have a choice of 3D histograms By varying parameter values or changing ranges of parameter values, you can conduct and refine your parametric simulation experiments For more detail, see Chapters 2 and 3 of Sam Savage, Decision Making with Insight

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**Excel Tornado Diagrams**

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**Experiment with Tornado Diagram**

Excel tutorial: Experiment with Tornado Diagram We use Customer Manag.xls as an example and assume that you have already done your calculations in workbook “Sensitivity”. We want to test how the system output is sensitive to various inputs. Open Customer Manag.xls Move to workbook “Sensitivity” Open Tornado.xls and you see “TM” tab in the Excel menu bar Go to TMTornado Diagram and window “Tornado Dialog” pops up

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**Experiment with Tornado Diagram**

Excel tutorial: Experiment with Tornado Diagram Move your curser to the box underneath “Data Range” Select range A22:D25, which contains input parameters and the ranges of values in a pre-specified format. The first row of this matrix is for labels: Assumptions, Base, Low, High, each of the remaining rows are for a particular input parameter. For each row other than the first, the first column stores the parameter name, the second, third and fourth store its base, low and high values. Move your curser to the box underneath “Result Cell” Select P13, which stores the system output Click “OK” We are done!

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