Hi,
Are you extracting data from ECC!
If yes, you need to check the hierarchy structure at ECC side and need to talk with functional people.
Let’s take an example to solve one hierarchy issue:
0GL_ACCOUNT hierarchy is not updated correctly.
Then you need to check the hierarchy structure in ECC side using T code: FSE3.
Then conclude structure you extracted into BI is same with ECC or not.
Regards,
Vijay