Measure Group with mixed aggregation   

What is the best way to handle the situation where a measure group contains 
some measures which are summed and others which have AggregationFunction set 
to "None"?   I would instinctively split these measures into two separate 
measure groups to exploit aggregation.  Is this a reasonable approach to take?

date: Fri, 4 Jul 2008 05:15:01 -0700   author:   JimS