1. An arrangement for use in a control system within a building, comprising: a plurality of sensor Microsystems configured to obtain environmental information regarding a plurality of areas in the building; a processing circuit operable to obtain data representative of the environmental information regarding the plurality of areas in the building under a first set of operating parameter values; cause the building control system to operate under a second set of operating parameter values, wherein a first parameter of the operating parameters to has a changed value; obtain data representative of the environmental information regarding the plurality of areas under the second set of operating parameter values; store the data representative of the environmental information under the second set of operating parameter values in a knowledge base; at a subsequent time, employ the knowledge base to adjust the operating parameter values.