Using the Impact window Tree view, you can group the listed CIs according to attribute.
To group by attribute:
On the Impact window Tree View, right-click a CI, then click Group by attribute. The Group by attribute window appears, listing all the business objects that have a relationship with the source CI for which you are checking impact.
Select the relevant business object, then select the attribute by which you want to group the CIs in the Tree view.
Click OK. All CIs are grouped according to the attribute you selected. If a business object does not contain the selected attribute, then those CIs are placed in the Other folder.
Grouping by attribute is temporary and the view is not retained after you close the Impact window.