Additional Windchill Capabilities > Windchill Supplier Management > Windchill Supplier Management Administration > Who Can Modify the AML/AVL and the Sourcing Status
  
Who Can Modify the AML/AVL and the Sourcing Status
Consider the following rules for making changes to the AML/AVL and the sourcing status.
If the user is a member of the Supplier Administrators group (with Read permission to the part), modifying the AML/AVL does not require a checkout of the OEM part, and the OEM part does not get iterated.
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A Supplier Administrator cannot modify the AML/AVL if the part is checked out to another user.
If the user is not a member of the Supplier Administrators group, the OEM part is auto-checked when the following properties are set to True:
When the system property com.ptc.windchill.suma.iterateOnAddRemoveAXL is set to True, the OEM part is auto-checked out during adding or removing AML/AVL relationships for users that are not members of the Supplier Administrators group.
When the system property com.ptc.windchill.suma.iterateOnModifyPreference is set to True, the OEM part is auto-checked out during the sourcing status update for users who are not members of the Supplier Administrators group.
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The history of changes is tracked even if the checkout of OEM parts is not required.