Maintaining a Product Storage Definition 
A product storage definition in SAP SCM is a separate business object assigned to a source of supply (SOS). The allowed storage resource alternatives, along with their priorities, are defined for each product storage definition.
Prerequisites
You have defined the following before creating a product storage definition:
A source of supply, for example, a production process model (PPM) or production data structure (PDS)
A container resource
The following conditions have been met in order to automatically integrate product flow data with the product storage definition when generating the PDS or PPM:
Enhancement package 4 for SAP ECC 6.0 is available.
The recipe for a material is present in SAP ERP. Product flow maintenance in the recipe is optional; if product flow is not maintained, only a blank storage definition will be created in SAP SCM during PDS or PPM generation.
You have created an active integration model to send recipe data as PDS or PPM.
Procedure
To create a product storage definition, complete the following steps:
On the SAP Easy Access screen, choose
Advanced Planning and Optimization 
Master Data Product Storage Definition [folder] Product Storage Definition
.On the selection screen, enter one or any combination of a source of supply (PPM or PDS), product, or location, then choose Execute.
NoteIf in display mode, switch to editing mode by choosing Display/Change.
End of the note.Select a source of supply and choose Display Storage Materials.
Choose the Assign Product to SOS.
Select one or more products and choose OK.
Set the consumption type.
Select one of the newly added products from the list in the Products for Source of Supply screen area of the Product Storage Definition screen, and choose Display Resource Alternatives or double-click the product name.
Choose Assign Resource Alternatives in the Alternative Resources screen area.
In the Resource column, enter one or more storage-capable container resources with the same location as the source of supply.
Assign a priority to each alternative resource.
Save the data.
Integrating Product Flow Data with Product Storage Definition During PDS or PPM Generation
You have defined product storage data as product flow in the recipe in SAP ERP. Use the BAdI as described below to automatically integrate this data with the product storage definition in SAP SCM when generating the PDS. Note that this integration works only in the direction from SAP ERP to SAP SCM.
On the SAP Easy Access screen, go to
Tools ABAP Workbench Utilities Business Add-Ins (BAdIs) Definition .Select the BadI Name option.
Enter /SAPAPO/CURTO_CREATE in the BAdI Name field.
Choose Create from the Enhancement Implementation menu.
Enter an implementation name, then choose Continue.
Enter a short description in the Implementation Short Text field, and go to the Interface tab screen.
In the list of methods, double-click CREATE_STORAGE_DEF, or select it and then choose
Implementation Activate .Save the data.
Proceeding to the Class Builder screen, set method parameter EV_TRUE to X.
To automatically integrate the product flow data with the product storage definition when generating the PPM, complete the following steps:
Activate the BAdI method in Customizing for SAP SCM under
Integration with SAP Components Integration via APO Core Interface (CIF) Application-Specific Settings and Enhancements Enhancements
of Production Process Models (PPMs) Inbound Processing of Production Process Models Influence Production Process Model Data in APO Inbound Processing (/SAPAPO/PPM_INBOUND → CREATE_STORAGE_DEF).Proceeding to the Class Builder screen, set method parameter EV_TRUE to X.
NoteWhen the BAdI is activated, direct creation of product flow in PPM is not allowed and produces warning and error messages if ignored.
End of the note.