fractional quantities in OTM

Summary: Continuation from the following post: How are fractional quantities handled in OTM?

OM Dev is investigating fractional issue and trying to learn the functionality of OTM.

1. In shipment planning does OTM uses ship unit weight for planning ?
2. Or Do they use Order Release level weight for planning ?
3. Is there a way to force OTM to plan based on ship unit weights only ? If yes, then what are the steps/configuration required.

Why we are asking above questions is because we understand that OTM does not allow ship unit count or packaged item count in fractional quantities so even if we pass 0.8 as ship unit count it will not process the xml.