In fact, during the three-year period, various actions were taken at both the technical level (e.g., refurbishment of part of the lighting systems and installa tion of inverters in fixed-speed engines, technological upgrading of some pro duction plants) and the management level (e.g., achievement of high yield levels by production lines, powering down of stand-by equipment, optimal regulation of air treatment systems in industrial buildings) aimed at making the produc tion process and the building management more efficient.