ASO MDX member formula and performance

Question

Hi,
I am doing some testing about MDX formulas and performance. I found a performance issue but I can not understand why is taking so long time a report.
The situation is:
I create a report or a MDX query with:
6 dimensions in row and 1 dimension in column
rows:
Period - Filtered using a member
Year - Filtered using a member
Relationship Manager - Filtered using a member
Report Type - Filtered using a member
Local Relationship Manager - 4400 members level 0
Global Relationship Manager - 10400 members level 0
Column:
Account dimension, only a member
The member selected for Report Type (RM.Local) has a formula
My Report Type dimension has 10 members, there is one member where I store data called : RM.Input
My first test was
RM.Local his formula is [RM.Input] , the report is run in 1 second
RM.Local his formula is ([RM.Input],[MTD]) where MTD is a member level 0 store in my view dimension. The report run in 20 minutes. I was not expecting so bad performance when I only pointing at [RM.Input],[MTD]
Do you consider this time is reasonable when I am using this formula?
The mdx report is:
With
set [_Local Relationship Manager3] as 'Descendants([All Local Relationship Managers], 2)' = level 0 members
set [_Global Relationship Manager4] as '[Global Relationship Manager].Generations(4).members' = level 0 members
set [_Period0] as '{[Period].[Oct]}'
set [_Relationship Manager4] as '{[Relationship Manager].[Dummy1)]}'
set [_Report Type0] as '{[Report Type].[RM.Local]}'
set [_Year2] as '{[Year].[FY-2013]}'
select
{ [Account].[Expenses]
} on columns,
NON EMPTY {crossjoin({[_Local Relationship Manager3]},crossjoin({[_Global Relationship Manager4]},crossjoin({[_Period0]},crossjoin({[_Relationship Manager4]},crossjoin({[_Report Type0]},{[_Year2]})))))} properties MEMBER_NAME, GEN_NUMBER, [Global Relationship Manager].[MEMBER_UNIQUE_NAME], [Global Relationship Manager].[Memnor], [Local Relationship Manager].[MEMBER_UNIQUE_NAME], [Local Relationship Manager].[Memnor], [Relationship Manager].[MEMBER_UNIQUE_NAME], [Relationship Manager].[Memnor], [Period].[Default], [Report Type].[Default], [Year].[MEMBER_UNIQUE_NAME], [Year].[Memnor] on rows
from [DICISRM.DICISRM]

Answer 1

Ok Try this one
But here you have to change the MDX formula every month.
Year
--FY2009
--FY2010
--FY2011
--FY2012
Period
--TotalYear
----Qtr1
-------Jan
-------Feb
-------Mar
Let say if you're CurrentYear  is FY2011 and you're Current Month is March then you're MDX will be
case when contains([Year].CurrentMember,MemberRange([FY2009],[FY2010])) and contains([Period].CurrentMember,MemberRange([Jan],[Feb]))
Then
B
else
C
end
For the Next month you just have to make a change in the MemberRange I.e.,(Replace Feb with Mar)
*case when contains([Year].CurrentMember,MemberRange([FY2009],[FY2010])) and contains([Period].CurrentMember,MemberRange([Jan],[Mar]))*
Then
B
else
C
end
I tested it and Its working fine.
I think this will solve you're problem but there might be a more elegant solution out there.
Regards,
RSG