The focus of the study is to observe and analyze control-oriented occupants behavior toward lighting, shading and natural ventilation systems based on a long-term study in two office buildings. Internal and external parameters; state of occupancy, state of lights, indoor and outdoor illuminance, temperature, relative humidity, state of shades and windows were continuously observed and recorded every five minutes over the period of 9 and 12 months. Subjective impressions and attitudes of observed building occupants were documented with questionnaires. Based on the results from this research,...