Hi Alex, this option is only used with the managed execution option of the same name.
Excerpt from the user guide:” Classification: When more than one object is ready to executed, TimeXtender prioritizes the objects based on their table classification. The order will be “Fact Table – Large”, “Fact Table”, “Dimension Table – Large”, “Dimension Table”. If two tables have the same classification TimeXtender will use the execution number as the secondary criteria.”
However we still suggest execution time as the most efficient option in most cases.

Yes, thats what I was looking for. Thank you very much, Joseph.