Rounding confirmation quantity


I am trying to round down the ATP confirmation qunaity in order UOM in APO before publishing the result to ECC. Aprreciate quich input.

Following three didn't fit the requirements.

Rounding options:

1. via Packaging Specification

2. via rules based ATP - calculation profile (package size):

3. Rounding to Sales Units

We are looking for a solution for CRM ERP orders that would work for RBA and non RBA ATP checks.

Many Thanks,