BPC NW 7.5: use standard dimensions

hi gurus:

i m reading a business blueprint for legal consolidation which was designed for a consultant who is unavailable for contact, so he suggested in the document to use Z dimensiones like: Z_COMPCODE, Z_DATASRC, Z_TIME, Z_MONEDA, but i d like to hear from ur experience, is this recommendable? Why not to use standar dimensions like: Entity, C_DataSrc, Time, RptCurrency? may be there are some advantages.

regards

jav