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Location Determination 
You can use this function to determine the target locations for physical returns (ship-to party for returned parts).
You need the following component processes:
● SAP CRM
● SAP ECC
● SAP Supply Chain Management, Advanced Planning and Optimization (SAP SCM, APO)
Customizing SAP APO
● In integrated rule maintenance, you have created a location determination procedure.
On the SAP Easy Access screen, choose Advanced Planning and Optimization ® Master Data ® Rule Maintenance ®Integrated Rule Maintenance.
○ For more information about integrated rule maintenance, see help.sap.com ® SAP Supply Chain Management ® SAP Advanced Planning and Optimization (SAP APO) ® Global Available-to-Promise (Global ATP) ® Settings for Global ATP ® Settings for the Rules-Based Availability Check ® Integrated Rule Maintenance.
○ For more information about the location determination procedure, see help.sap.com ® SAP Supply Chain Management ® SAP Advanced Planning and Optimization (SAP APO) ® Global Available-to-Promise (Global ATP) ® Settings for Global ATP ® Settings for the Rules-Based Availability Check ® Integrated Rule Maintenance ® Creating Location Determination Procedures.
● You have specified conditions and available-to-promise (ATP) profiles.
To do so, in Customizing for SAP SCM, choose Advanced Planning and Optimization ® Global Available-to-Promise (Global ATP) and complete the following activities:
○ General Settings ® Maintain Requirements Profile
○ Rules-Based Availability Check ® Define Condition Table
○ Rules-Based Availability Check ® Maintain Access Sequences
○ Rules-Based Availability Check ® Maintain Condition Type
○ Rules-Based Availability Check ® Maintain Rule Strategy
Customizing SAP CRM
You have defined an ATP profile.
To do so, in Customizing for SAP CRM, choose Basic Functions ® Availability Check ® Availability Check Using SAP APO ® Define ATP Profile.
● Settings for target location
You have assigned an ATP profile to the item category of the returns authorization, which corresponds to a requirements profile in SAP APO.
To do so, in Customizing for SAP CRM, choose Transactions ® Basic Settings ® Define Item Categories.
For more information, see the Implementation Guide (IMG) documentation in Customizing for SAP Supply Chain Management by choosing Advanced Planning and Optimization ® Global Available-to-Promise (Global ATP) ® General Settings ® Maintain Requirements Profile.
○ You have assigned a partner determination procedure to the item category of the returns authorization.
To do so, in Customizing for SAP CRM, choose Transactions ® Basic Settings ® Define Item Categories.
○ You have defined the assigned partner determination procedure as follows:
■ The partner determination procedure has function Ship-To Party (Returns) as the Partner Function in Procedure.
■ The partner determination procedure has Return Delivery Partner via APO as the Access Sequence.
To do so, in Customizing for SAP CRM, choose Basic Functions ® Partner Processing ® Define Partner Determination Procedure.
● You have assigned the locations (plants) to the partners.
To do so, in Customizing for SAP CRM, choose Transactions ® Settings for Complaints ® Integration ® Logistics Integration ® Assign Locations to Business Partners.
● The locations are replicated from SAP SCM to SAP ECC.
For each returns authorization item of a return document, used part returns document, or complaint document in SAP CRM, the system triggers location determination in SAP APO.
SAP APO determines the location and transfers this data to SAP CRM. The location is entered as the business partner of the returns authorization item.
If the location is copied from a preceding document, such as a marketing campaign or recall, there is no additional location determination in SAP APO.