Re: Substring

Since these are member names and I assume you have parents that denote the years, you could use the ISancestor function for the currentmember. Note ISAncestor does both ancestors and descendants dependent on the order of members so something like
Case When ISANCESTOR(time.currentmember,time.[FY10]) Then
....
When...
End

Note you might need to switch the two paramaters, I never remember which goes first