A test harness is a constructon around the system under test to stimulate it with specified inputs and record the data to be evaluated. If you use Arttest for your Model tests, you do not need to worry about the harness construction. Arttest generates the harness automatically on your command.
Thus, once generated, you can start with the specification and execution of the test.
Besides the standard configuration, Arttest enables you to configure the harness generation specific to your needs. E.g., if you want to