Assisted Association identifies the physical element that is overlapped by the newly created analytical elements and creates the association between them with no additional clicks.
While creating the analytical representation for a Revit model manually, you need to associate each analytical element with its physical context. Prior to the 2023.1 release of Revit, you could only create this association manually, after creating each analytical element. Now, Assisted Association will help you speed up your work.
When you create an analytical element, in the contextual Modify tab of the element 
Coordination panel, click
(Assisted Association) to turn on the automatic association between the physical and the analytical overlapping elements. Then, draw an analytical element over a physical one. If the association was successful, the physical model is highlighted.
This feature is described on the
product road map.
See Assisted Association.