AA,
You didn't answer my question about strategy. You also didn't answer my question about why the business wants different Base Units of Measure between ECC and APO. In this context, it seems that the BT/BOT issue is irrelevant.
It is OK to have BT BUOM in ECC system X for Material A; and CIF to APO.
It is OK to have BOT BUOM in ECC system Y for Material B; and CIF to APO.
It is NOT OK to have BT BUOM in ECC system X for material A; and BOT in ECC system Y for Material A, and then try to CIF Material A data from both systems into APO. SAP doesn't really support this in unenhanced standard.
Are you saying that the BUOM in the APO Product Master is different from the ECC Material Master BUOM? How did you arrange for that to happen?
Where do your forecasts originate; one or both of the ECC systems; or SCM DP? Or....? As mentioned by expert Ada, PGI is normally done in BUOM in ECC, and BUOM should be the same in ECC as it is in APO for any single material.
Best Regards,
DB49