This document specifies: — a structured list of control, building automation and technical building management functions which contribute to the energy performance of buildings; functions have been categorized and structured according to building disciplines and building automation and control (BAC); — a method to define minimum requirements or any specification regarding the control, building automation and technical building management functions contributing to energy efficiency of a building to be implemented in building of different complexities; — a factor-based method to get a first estimation of the effect of these functions on typical buildings types and use profiles; — detailed methods to assess the effect of these functions on a given building.