Global Order Promising needs at lot level for specific source/channel of order

Summary:

Item A is procured for different channels at different purchase prices and these are lot controlled.

Now for a SO that is coming in through a specific channel, the item A lot which was purchased for that specific channel needs to be used to fulfil the SO as the purchase prices are different for different channels and for this Gross Margin needs to be calculated correctly.

Now for Order Promising, we need to model each of these channels as Inventory Orgs, however, physically they are not. Moreover, we have a 3rd party WMS involved here, so reservations will be done at wave picking by the WMS and we do not want to reserve stock in oracle.