Example - determine matrix
The tool might present the user with several standard arrays including the one we used before. Lets just select that one.
The user is asked for a name for the first factor. (e.g., Memory Size). Then the tool asks for names for each of the levels. (e.g. 64 mg, 128 mg)
Notice that there are only 2 memory sizes. When the user is asked for a name for the third level, the user selects which of the previous two items to repeat.