[sonali31]

First of all, the functions the atrium should fulfill must be defined and assessed; are they feasible as such and in combination? Position and shape of an atrium determine some aspects already, like wayfinding, day light, contact with nature.
The next priority is the comfort of users/occupants of the atrium: thermal, acoustical, visual: depending on the functions for each aspect of comfort limits can be set and differentiated locaaly if necessary, for instance in a seating area higher demands for thermal and acoustical climate.