I would say ALL panels as what panel does NO-t have an integer or a character on it?
What are you trying to do?
What impact are trying to work out?
Why just the panels...what about the webservces model ...what about the web pages model....any change to your standards layer (in Agria case it is obs-strd) then it will effect all the group models.
www.stellatools.com have got tools that can help but only if you are clear on what you are trying to do and know the impact of that change.