A method for providing an operating and monitoring mechanism for a group of actors (Act1 - Act4) in a building automation system, wherein each of the actors (Act1 - Act4) is represented by a building automation object (BAO1 - BAO32), wherein each of the building automation objects (BAO1 - BAO32) is a data object comprising semantic tags (T1 - T10, T5'- T6', T5" - T6", Tag1 - Tag4), characterizing each a respective actor, the method comprising: providing the building automation objects (BAO1 - BAO32) of the respective actors (Act1 - Act4) of the group by dereferencing the respective semantic tags (T1 - T10,T5'- T6`,T5" - T6", Tag1 - Tag4); selecting a group master object (GMO1, GMO2) from the provided building automation objects (BAO1 - BAO32) by analyzing attributes (AT1 - AT17) of the building automation objects (BAO1 - BAO32); assigning a user interface (UI1 - UI4,UI2',UI3') to the selected group master object (GMO1, GMO2) adapted to operate and monitor the selected group master object (GMO1, GMO2), wherein the user interface (UI1-UI4, UI2', UI3') is provided on a display (D1, D2); characterized in that performing the selection of the group master object (GMO1, GMO2) is dynamically and permanently executed during runtime based on the analyzed attributes (AT1 - AT17) of the building automation objects (BAO1 - BAO32), and wherein the selection is based on analyzing a physical status and an applicative status of the respective actors (Act1 - Act4), wherein the selected group master object (GMO1, GMO2) is acting as a speaker of the group, and wherein the group master object (GMO1, GMO2) is representing the group also regarding visualizing a status and/or a present value (PV1, PV2) of the group. providing the building automation objects (BAO1 - BAO32) of the respective actors (Act1 - Act4) of the group by dereferencing the respective semantic tags (T1 - T10,T5'- T6`,T5" - T6", Tag1 - Tag4); selecting a group master object (GMO1, GMO2) from the provided building automation objects (BAO1 - BAO32) by analyzing attributes (AT1 - AT17) of the building automation objects (BAO1 - BAO32); assigning a user interface (UI1 - UI4,UI2',UI3') to the selected group master object (GMO1, GMO2) adapted to operate and monitor the selected group master object (GMO1, GMO2), wherein the user interface (UI1-UI4, UI2', UI3') is provided on a display (D1, D2); characterized in that performing the selection of the group master object (GMO1, GMO2) is dynamically and permanently executed during runtime based on the analyzed attributes (AT1 - AT17) of the building automation objects (BAO1 - BAO32), and wherein the selection is based on analyzing a physical status and an applicative status of the respective actors (Act1 - Act4), wherein the selected group master object (GMO1, GMO2) is acting as a speaker of the group, and wherein the group master object (GMO1, GMO2) is representing the group also regarding visualizing a status and/or a present value (PV1, PV2) of the group. wherein the selected group master object (GMO1, GMO2) is acting as a speaker of the group, and wherein the group master object (GMO1, GMO2) is representing the group also regarding visualizing a status and/or a present value (PV1, PV2) of the group. <EOS>