Adjustment Cart stores items which could not be fulfilled in a certain order. The 'Supplier' when editing the order, can add the item to the next order if that item is currently not available. Likewise if the entire quantity of the item ordered cannot be fulfilled, the balance can be sent to the adjustment cart. All these items are added to the adjustment cart.
The items added to the adjustment cart are displayed with the Order#. Both the 'Buyer' & the 'Supplier' can move items from the Adjustment Cart to the currently selected Order Cart.