How About a Group Inventory?

Step Four and Step Ten have to do with personal inventory. All twelve of AA's suggested Steps are personal in that they deal with the individual. They constitute his charter of freedom. The Twelve Traditions, On the other hand, they relate to AA as a whole and to AA in its various parts, particularly the groups. They constitute AA's guide to unity. Now if the individual should take periodic inventory, why not the group? (And, incidentally, why not the local club, Intergroup, and General Service Headquarters?)