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Transfer and Inventory Management 
Transfer and Inventory Management in SAP Service Parts Management (SPM) in ERP encompasses the following functions:
· Stock transfer functions map the transfer of stock from connected systems (SAP CRM, SAP APO) and execute these transfers in SAP EWM.
For more information, see Stock Transfers.
· Inventory management functions hold valuated stock in the Inventory Management (MM-IM) component and communicate this data to Financial Accounting (FI) for further financial processing.
For more information, see Inventory Management.
Transfer and Inventory Management maps processes between the following components:
· SAP EWM is the leading system for quantified stock and for goods receipts, goods issues, physical stock transfers, and posting changes.
· SAP SPM distributes information about the stock movements between SAP EWM and SAP APO.
· SAP APO plans the deployment of stock across storage locations and processes backorders.
· SAP CRM is the leading system for returns and assigns returns material authorization (RMA) and core credit request (CCR) numbers.
