The Output Relate option is used to establish the relationship between modeling input data and simulation output results.  Once a relate (link) is established, the user can then apply queries against the current project based on modeling inputs and simulation output results simultaneously.

To create or modify an Output Relate, go to the Model Explorer, click the Operation tab on the bottom, navigate to the Output Relate group, and right-click on the Output Relate and select New to create an Output Relate, or double-click on any existing Output Relate to modify.