Depending on your organizational model, you will have different documents for the staging process.

If you are using two separate SAP EWM-managed storage locations in one warehouse, or one single SAP EWM-managed storage location, the system uses a posting change delivery.
Note
When the destination storage location is an inventory-managed (MM-IM) storage location only, you have an outbound delivery from the supplying storage location or SAP EWM warehouse. You can have a two-step stock transfer when using two SAP EWM-managed storage locations with two separate warehouse numbers. In this case, there is an outbound delivery from the supplying storage location or warehouse for the first step, and an inbound delivery for the second step.
The ERP system does not know of such a delivery, so technically the delivery in ERP is always an outbound or an inbound delivery. In a warehouse internal movement, it is an outbound delivery document type.
Delivery-based Staging Documents

Note
These different scenarios are reflected at two customizing topics, one in SAP ERP, one in SAP EWM. In SAP ERP there is a Delivery Type Determination in EWM Manufacturing Integration, the path is Logistics Execution → SAP EWM Integration → Production Planning and Control → Define Delivery Type Determination. For a combination of plant (optional), storage location (optional) and Process (mandatory), you define the delivery type and movement type (only for 1-step stock transfers) to be used. SAP delivery some default entries in the standard.
With the Process, you distinguish the following:
- Different staging indicators (pick parts or release order parts)
- Specific production processes (kanban or repetitive manufacturing)
- Whether it is a staging step or a goods issue step
This process translates in SAP EWM into the Code for Initiator of a Communication Chain, which is used to map the ERP document type to the EWM document type (SCM Extended Warehouse Management → Extended Warehouse Management → Interfaces → ERP Integration → Delivery Processing → Map Document Types from ERP System to EWM. Examples are as follows:
- PSD Production Supply (Inbound/Outbound)
This would be used for an inbound (if required) and an outbound delivery in the scenario where the supplying storage location and the receiving storage location are not connected to the same warehouse number.
- PSP Production Supply (Posting Change)
Only one storage location is used or the supplying and the receiving storage location are connected to the same warehouse number.
- PCD Consumption for Production
- When the staged components are consumed from ERP and goods issue is posted.