What is a Scenario Parameter?

Scenario parameters are placeholders like variables, only to represent a value that changes from scenario to scenario. For example, if you want to run three model scenarios experimenting with different numbers of resources, you would enter a scenario parameter Quantity field and then define three different scenarios with three different numbers in the Scenarios Parameters tab of the Attributes, Variables & Scenarios dialog.

What is the actual value of using scenario parameters compared to making the changes directly to the model? Good question! Scenario parameters combined with scenarios allow the comparison of all experiments on the same output with no extra work on your part. Scenario parameters also allow the optimizer to change values to find the best solution automatically.

Scenario Parameters

New This button creates a new parameter that may then be edited. By default, all scenario parameters start with “p_.” The common prefix avoids naming conflicts with all other model entries and makes these names easy to identify.

Delete This button deletes the selected parameter.

Name The name of the parameter to be used in the model in place of actual values.