Mandatory element
Once a simulation is completed and hopefully well initialized at a feasible solution, the user might be interested in an optimization for design or control.
Purpose
The constraints editor basically loads the underlying simulation, which is then used for the optimization.
Explanation of the editor
In the constraints editor in Figure 1, the user supplies the simulation, which is then visualized in the equations and the functions tab. The indexing cannot be changed anymore as this is only done at the simulation level. Beyond that, there is nothing the user needs to do.