The model assistant is a new Reves DSE feature focused on helping you understand your model better and provides a method to play with some input values and see the results as if you are using Excel.
Each parameter in your model will appear in the table of the model assistant panel on the right when you are in the Knowledge environment. The model assistant will attempt to solve your current model after a knowledge change, an parameter input change or a manual recalculate. Any calculated values and other relevant data will appear in the model assistant table and the parameter details panel below the table.