Department of Facilities Management, Faculty of Cooperative Studies, Berlin School of Economics and Law, Berlin, Germany, Department of Engineering (II), University of Applied Sciences HTW Berlin, Wilhelminenhofstraße, Berlin, Germany., Department of Engineering (II), University of Applied Sciences HTW Berlin, Wilhelminenhofstraße, Berlin, Germany. and Department of Facilities Management, Faculty of Cooperative Studies, Berlin School of Economics and Law, Berlin, Germany.