Rounding confirmation quantity

Hi,

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

http://help.sap.com/saphelp_scm70/helpdata/en/cf/fb8042498bd665e10000000a155106/content.htm

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

http://help.sap.com/saphelp_scm70/helpdata/en/aa/1772377a2aab49e10000009b38f842/frameset.htm

3. Rounding to Sales Units

http://help.sap.com/saphelp_scm70/helpdata/en/4d/fc8042498bd665e10000000a155106/content.htm

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

Many Thanks,

Bijit