How to split one record from ff to 3 records in cube

Hi,

I have to load data from flat file  to cube, ,here the logic is as shown below in the flat file it is single record and in cube it shd be 3 records based on activity type where we give activity type in the transformation which shd be constant, in the cube there shd be three records, what are the ways to achieve it, please advise

Thanks in Advance,

harshitha