Identify the Critical Factors in Your Models
Have you ever been faced with a large, complex spreadsheet model and been tasked with determining what the most important factors are? What if you need to determine how sensitive your profits are to particular variables, such as material costs or market share? Or perhaps you want to run a risk analysis in @RISK, but don’t know which variables are important enough to add distribution functions to.
Included with the DecisionTools Suite, TopRank performs automated “what if” sensitivity analysis on Microsoft Excel spreadsheets to answer these questions. Define any output or “bottom line” cell or cells, and TopRank will automatically find and vary all input cells which affect your output. You can also control exactly which cells you’d like to analyze. The end result is easy-to-understand tornado charts, spider graphs, and other reports which clearly identify and rank which affect your bottom line the most.
How TopRank Works
Simply take your existing spreadsheet model, select any cell or cells as outputs, and TopRank scans the spreadsheet to find cells which affect your results. Click the ‘Run What-if’ button and TopRank tries different values for each variable cell, changing values over ranges such as -10% and +10%. Each time a new value is tried, the spreadsheet is recalculated and new results are generated. Upon completion, TopRank ranks the variable cells according to the effect they have on your selected outputs. You can also select exactly which cells you wish to vary, and by how much, for a more customized analysis.
TopRank uses Vary functions in Excel to vary inputs across a range. TopRank functions are true Excel functions, and behave exactly as native Excel functions do. TopRank windows point to the cells they refer to via callouts, and changes in one place are automatically carried out in the other.
TopRank results are displayed in a variety of reports and charts. Graphs include:
Tornado Graphs – Display the relative ranking of one input versus another by comparing the effects of all inputs on results. For each input, the length of the bar indicates the amount of change the input caused on results.
Spider Graphs – Also compares the effects of multiple inputs on results. For each input, the percentage changes in its value from the base case is plotted on the X-axis, and the percentage change in results is plotted on the Y-axis. As inputs have different effects on results, the graph often resembles a spider.
Sensitivity Graphs – The effects of an individual input on results can be plotted with a standard line graph. The value of the input is plotted on the X-axis and the value of results is plotted on the Y-axis. This simple X-Y plot indicates how results change in conjunction with the underlying input.
Multi-Way What-If Analysis – Varies two or more inputs at the same time instead of one at a time. Multi-Way What-if Analysis calculates the effect of each combination of input values on the results.
VaryTable Function – Often in the real world inputs only vary among several possible values. The VaryTable function lets you specify a list or table of values among which an input varies.
Support for @RISK Functions – The Industrial version of TopRank recognizes @RISK probability distribution functions to provide more flexibility in modeling variation across an input. @RISK functions can model a greater variety of ranges and probabilities than standard TopRank Vary functions.
Until now, What-if analysis was done by manually selecting a cell, trying two or three different “What-if” values, recording the values of some result cell, and repeating for a few other cells in the spreadsheet. This process was both time-consuming and non-rigorous. Now, in a matter of seconds, TopRank gives you the answers you need by performing a fast and rigorous analysis.
Designed for your largest, most complex models, TopRank Industrial adds the following features:
Support for @RISK Functions – TopRank Industrial recognizes @RISK probability distribution functions to provide more flexibility in modeling variation across an input. @RISK functions can model a greater variety of ranges and probabilities than standard TopRank Vary functions.
Unlimited Multi-Way What-If Analysis – TopRank Industrial supports an unlimited number of input combinations, while TopRank Professional allows only two or three variable combinations.
Part of the DecisionTools Suite
TopRank is part of the DecisionTools Suite, Palisade’s complete risk and decision analysis toolkit. The DecisionTools Suite includes @RISK for risk analysis using Monte Carlo simulation, NeuralTools for prediction using neural networks, StatTools for statistical analysis, PrecisionTree for decision trees, Evolver for optimization, and more. TopRank is fully compatible with all DecisionTools programs and can be combined with them for greater insight and analysis. For example:
TopRank then @RISK
TopRank is useful for narrowing down the focus of large models before performing a risk analysis with @RISK. Especially with large models, this saves time and improves accuracy of your @RISK analysis. In addition, TopRank can use @RISK to represent a wider range of values than TopRank’s standard functions.
TopRank can also be run with PrecisionTree models to identify the most critical factors in larger, more complex tree models.
Save Over 50% When You Buy the Suite
When you buy the DecisionTools Suite, you save over 50% versus buying all components individually. The best analyses at a great price–with the DecisionTools Suite.
Licensing and Training
TopRank is available through a variety of licensing options, including corporate, network, and academic licenses. Training, consulting, and books can be bundled with your software to ensure you and your staff get the most out of your investment.
TopRank calculations are performed 100% within Excel, supported by Palisade sampling and statistics proven in over twenty years of use. Palisade does not attempt to rewrite Excel in an external recalculator to gain speed. A single recalculation from an unsupported or poorly reproduced macro or function can dramatically change your results. Where will it occur, and when?
64-bit technology enables Excel and DecisionTools software to access much more computer memory than ever before. This allows for vastly larger models and greater computational power.