Before explaining the difference of material stock transfer with or without WM in SAP system, let's clarify two different levels IM and WM:
* IM -- Inventory Management, all materials will be managed at this level without WM module activated;
* WM -- Warehouse Management, if
WM is activated at someone storage location, then all materials at the
storage location will be managed at WM level, that is to say at storage
bin level.
So we can see the difference processes of stock transfer as follows:
* Storage location to Storage location without WM: When do it with MIGO or MB1B, system will only generate the material document to record the operation of stock transfer in SAP system, the stock will be transferred to the destination storage location automatically;
* Storage location without WM to Storage location with WM: Under this scenario, because the destination storage location with WM, after do it with MIGO or MB1B, you need to create the transfer order or let system generate it automatically. The stock will not be transferred to the destination until the transfer order is confirmed;
* Storage location to Storage location
with WM: At this scenario, you need to create two transfer orders, the
first one is for the pick up process from source bin of the first storage
location, the other one is for the put away process to destination bin
of the second storage location.
For stock transfer from plant to plant and storage location to storage location, you have following options available:
Transfers from a WMS storage location to a non-WMS storage location.
In WMS, this is processed the same as a goods issue (and subsequent pick).
Transfers from a non-WMS storage location to a WMS storage location.
In WMS, this is processed the same as a goods receipt (and subsequent putaway).
Transfers from a WMS storage location to another WMS storage location.
When two different warehouses, for example, are assigned to two separate WMS storage locations, this type of transfer is processed the same as a goods issue (and subsequent pick) in the issuing warehouse and as a goods receipt (and subsequent putaway) in the receiving warehouse.
If materials are transferred within the same WMS warehouse which is assigned to two separate WMS storage locations, it is handled as a plant to plant posting change.
