Hi,
creating the hier is possible only BW 3.X and BI 7.3 but not possible to create the hier in BI 7.0.
you want create the hier entet the tcode - RSA1OLD create the hier.
then check the hier in BI system enter tcode - RSA1 for specific object.
plesae search on google "how to load the hier in sap bi".
Thanks,
Phani.