How to calculate a YTD based on the Month short - ssas

Question

I have hierarchy: Month,Monthshort and Year-Quarter-Month under TimeDim Dimension,a scope is available like below to calculate YearToDate(YTD)
Scope([TimeDim].[Year - Quarter - Month].[Month].members, [TimeDim].[Month].Members);
YTD:
([TimeDim].[YTD]=
Sum(
CrossJoin(
{[Time Calculation].[Current Period]},
PeriodsToDate([TimeDim].[Year - Quarter - Month].[Year],
[Timedim].[Year - Quarter - Month].CurrentMember
)
)
)
);
Month will be in format YYYY-MM fullname(eg: 2017-10 October) and Month short will be MMM(Oct). If I calculate YTD on the measure based on month it works fine,
How to calculate YTD based on Month Short? Do I require to create new scope to calulate YTD based on Month short? I am new to SSAS. Please help

Answer 1

Yes, this requires new SCOPE.
Because current scope contains Year "anchor" here: [TimeDim].[Year - Quarter - Month].[Year].
Answer will be updated once all additional questions answered

Answer 2

I created below scope for YTD with month short. Thus solved the problem.
Scope([Time Year Month].[Year].members,[Time Year Month].[Year - Month].[Month Short].members);
-- accumulated YTD CALCULATIONS
([Time Calculation].[YTD]=
SUM(
CrossJoin(
{[Time Calculation].[Current Period]},
PeriodsToDate([Time Year Month].[Year - Month].[Year]
)
)
)
);
End Scope;