TreePlan helps you build a decision tree diagram in an Excel worksheet using dialog boxes.

Decision trees are useful for analyzing sequential decision problems under uncertainty.

TreePlan automatically includes formulas for summing cash flows to obtain outcome values and for calculating rollback values for determining optimal strategy.

SensIt performs sensitivity analysis on your Excel worksheet what-if model.

SensIt automates sensitivity analysis and creates simple plots, spider charts, and tornado charts.

In a decision situation, sensitivity analysis helps you determine which of your input assumptions are critical so that you know where to focus your effort for gathering more information or reducing uncertainty.

RiskSim provides random number generator functions as inputs for your Excel worksheet model, automates Monte Carlo simulation, and creates charts.

RiskSim automates the simulation by trying thousands of what-ifs consistent with your assessment of the uncertainties and displays the results in both histogram and cumulative distribution charts.

TreePlan ToolKit is the bundle of all three add-ins: TreePlan, SensIt, and RiskSim.

WhatIf ToolKit is the bundle of SensIt and RiskSim for analyzing a spreadsheet what-if model.

Better Histogram is a free add-in for creating a better histogram from data on a worksheet.