Spider Analysis Option
Use this option to analyze how the selected Output varies as each
input does.
Input changes are expressed as a percentage of the initial value.

Tornado Analysis Option.
Use this option to analyze how the selected Output varies as each
selected input does, with input ranges depicted as horizontal bars.

Sensitivity Tables Option.
Use this option to do "What if" analysis.
Analyze how one or multiple Outputs in your model vary as selected
inputs take different values.
You can work with up to 20 Outputs and 10 inputs.

Note: An Input is any variable in your model which is not the result of a
formula, but is part of one, and is not a string.
An Output is any variable in your model which is the result of a formula
with numerical inputs.