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Association Maintenance 
You can use the association function when you are processing a trading contract in one of the following processes:
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· Creating or changing a contract
· Creating a new logistics document (only in sales processes)
· Changing an item quantity when processing logistics documents (only in the purchasing process)
· Maintaining an association independently using the Trading Execution Workbench.
· Purchasing-side process
In purchasing document processing, the system checks the processed quantity. If an item quantity is changed in the document, the associated quantity can be adjusted either automatically or manually.
· Sales-side process
If you create an association during trading contract processing, this relationship is passed on to the follow-on logistics document. If you process the trading contract further, the system checks for an association record. During sales document processing, the system provides a screen for creating or confirming an association partner item. Only selected association partners and quantities can be passed to the document.
· Creating an association from the Trading Execution Workbench
After creating a logistics document, you can create an association for a document item in the Trading Execution Workbench. When executing the process you are taken to a screen where you can select association candidates. In this screen, you create a new association record. When doing this you must enter the association quantity. This must not be greater than the open quantity of the items involved.
