RapidMiner is always executing one operator at a time. How can I change the order?
Changing the exectution order is usually not necessary. There are only a few cases where you need to do it:
To do this you can click on the small blue icon on the upper right most edge of the Process Panel
Once you clicked on it you see the real execution ordering. You can not right click on the numbers
to make the execution of the operator as early as possible.
You can also change the ordering manually by clicking on the first operator (here: Multiply) and then on the operator which should be excecuted next (here: Validation).