A DUT type represents a specific variant of your devices under test. You need to define at least one DUT type.
To add a DUT type simply click on an empty row in the grid and type a name. Description is optional.
To delete a DUT type select a row and press the DEL key on your keyboard.
Later, when you configure your test, you assign each DUT a DUT type. The DUT type also determines which set of limits to use for that DUT, since each DUT type has its own set of limits.