MDX Using SUM() to Convert A Query to A MDX Statement

Using SUM() function allows you to convert a regular MDX query to a MDX statement. So it can be used in for calculated member. The post below talks about it:

http://social.msdn.microsoft.com/forums/en-US/sqlanalysisservices/thread/7c2b58e1-4b20-4f8b-866f-7c328add916d/

If more than one set if required to slice the data, wrap the sets and measure with SUM() function. It's like using a tuple that allows slicing by sets instead of members. See example:

SUM(([Measures].[_Microsoft_VSTS_Scheduling_CompletedWork], [WorkStreams], [Work Item].[System_WorkItemType].&[eScrum Sprint Task]))