KANBAN Subcontract Replenishment

Question

We have a scenario where we are using KANBAN to manage a subcontract item.  We know that subcontract scheduling agreements will not properly deduct the component inventory from the supplier's inventory (543 movement type) and that SAP admits that scheduling agreements cannot be used for this replenishment.
We would rather avoid using purchase orders for the replenishment, as the number of created purchase orders would overwhelm the accounts payable folks.
What other solutions would be available to us to manage subcontract through KANBAN?

Answer 1

It's been explained in the OSS Message 0020079747 0000841607 2009
that        
"In Customizing under Logistics Execution ->Warehouse Management ->    
Interfaces -> Stock Transfer for Kanban, you assign the WM storage type
(interface) to the KANBAN (demand) storage location and also define the
movement type for the transfer posting from the WM storage location to 
the KANBAN storage location (standard 311)."                                                                               
If you are doing stock transfer with Kanban, the material will be      
transferred from the WM storage location via the Kanban interface to the
supply area, which is set in the control cycle. Therefore, the Kanban  
interface must be maintained in the customizing specific to each of the
receiving(supply area) storage locations. It is imperative that we have
different interface storage types for each of the receiving Kanban     
storage locations.                                                                               
It is not the question of permitting multiple supply areas rather is the
restriction of using same interface storage type for many supply areas 
(belonging to different storage locations). Please check if the Kanban 
interface storage type assigned in control cycle under question is     
already been defined as the interface for some other Storage location in
which case you may have to define new storage type for each of the     
Supply area storage locations!