The following assumes a commercial building with a ground floor and four upper floors. On the ground floor is a retail outlet with a showroom. Each of the upper floors has four offices, three laboratories, and one IT room (server, printer, fax etc.) Access to the upper floors is via a staircase and service elevator. There are various alternatives for dividing this commercial building into operating zones.
The commercial building is occupied by only one tenant. In this case, the building can easily be divided into 5 room groups or "geographical zone (apartm.)".
Ground floor: 🡺 Geographical zone (apartm.)=1 (Room group 1)
Stairwell: 🡺 Geographical zone (apartm.)=2 (Room group 2)
All IT rooms, Floors 1 – 4: 🡺 Geographical zone (apartm.)=3 (Room group 3)
All offices, Floors 1 – 4: 🡺 Geographical zone (apartm.)=4 (Room group 4)
All labs, Floors 1 – 4: 🡺 Geographical zone (apartm.)=5 (Room group 5)
There are five tenants in the commercial building. Tenant 1 occupies the ground floor, and tenants 2 to 5 each occupy one of the four upper floors. All tenants have their own requirements for their offices and labs. From a technical perspective, this requires the building to be divided into eleven "geographical zone (apartm.)" or room groups.