Carry out these steps to associate the selected root causes to all concerns that are added for the selected part.
Select the Attribute tab.
Click Parts/Concerns/Repairs.
Select a part from the list in the upper-left pane.
The list of associated concerns is shown in the lower-left pane.
Select the Root Causes tab in the right-hand pane.
Drag and drop root causes from the right-hand pane onto the required concern in the lower-left pane.
Click OK.
The root cause is associated to the part/concern.