Apparatuses, methods and systems of a building control system are disclosed. One building control system includes a plurality of building sensor fixtures, wherein at least one of the plurality of building sensor fixtures includes a sensor, a controller and a communication port. The building control system further includes a system controller. At least one of the system controller and one or more controllers of the plurality of building sensor fixtures is operative to determine a plurality of selected groups of the plurality of building sensor fixtures, compare a first characteristic between the plurality of the selected groups, and identify deviations of the compared first characteristic between the plurality of the selected groups.