Abstract: The invention relates to a method of operation for a building automation system comprising the provision and/or collection of at least one piece of information which describes at least one time involvement and/or energy involvement provided in order to attain at least one particular building zone climate and/or at least one particular building zone climate change, using the at least one piece of information in order to ascertain at least one requisite time involvement and/or energy involvement in order to attain at least one building zone climate that is to be achieved and/or at least one building zone climate change that is to be achieved, and/or using the at least one piece of information in order to ascertain at least one measure for influencing the building zone climate, which measure can be used to attain at least one building zone climate that is to be achieved and/or at least one building zone climate change that is to be achieved in time-optimized and/or energy-optimized fashion or to attain it/them w