Vensim has two methods of setting up sensitivity simulations. One is to use the Sensitivity tab of the Simulation Control to set up the control files. The other way is to use the Sensitivity button on the Toolbar to activate the Sensitivity Wizard.
| Ø | Double click on the Runname editing box and type the name sensitivity for the dataset (currently baserun). |
| Ø | Click the Sensitivity button  on the Toolbar. |
The Sensitivity Wizard opens at the Sensitivity Control
| Ø | Make sure that the radio button for Multivariate is selected and that the Number of Simulations is set to 200. |
Monte Carlo multivariate sensitivity works by sampling a set of numbers from within bounded domains. To perform one multivariate test, the distribution for each parameter specified is sampled, and the resulting values used in a simulation. When the Number of Simulations is set at 200, this process will be repeated 200 times.
| Ø | Click on the Parameter button, a Control Parameter dialog box will open showing all the parameters (Constants) in the model that can be selected for Monte Carlo sampling. Click on sales force productivity and click OK. |
