I got a problem with SPLIT when 1 column was not included in Group. I intended to make it not in Group and hope it the values in another column can be averaged.
So I made a sample Data Table to play and try to understand what's going on.
Sample table below:

Scenario1:
I want to Split "Random metric value", Split by Tool A&B, Group by only "Test", and hope the "random metric value" from different iterations can be averaged for the same "Test".
Here is what I got:

Scenario 2:
But when I do manual averaging (Summary-Mean(Random Metric Value) then split by tool A&B), the results are different:

Above should be the right results.
But my question is: what is happening when I do SPLIT in the 1st scenario without cast "Iteration" column anywhere?
Best regards,
Zihao
The split does not do any calculations. In your first case, it is selecting the last iteration value for each test and placing that into the appropriate Tool A or Tool B.