オフィス照明のゾーニング運用が執務者の行動・意識に与える影響の評価

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  • EVALUATION OF INFLUENCE OF SEVERAL LIGHTING ZONE OPERATIONS ON OFFICE OCCUPANTS' ZONE SELECTION AND CONSCIOUSNESS
  • オフィス ショウメイ ノ ゾーニング ウンヨウ ガ シツムシャ ノ コウドウ ・ イシキ ニ アタエル エイキョウ ノ ヒョウカ

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<p> Multiple studies have revealed that various lighting environment has some effects on workplace productivity. An environment where the illuminance and color temperature are set low (about 3000K), has some effects of relaxation and creative works. Also, an environment where the illuminance and color temperature are set high (about 1000lux/5500K) has some effects on focusing works. However, conventional design of lighting environment in an office used to take priority on setting uniform lighting environment. That’s why these lighting methods have not been applied to actual offices. On the other hand, ABW (Activity Based Working) has been focused on as a new style of workplace from the view point of office occupants’ productivity. The ABW office provides various zones according to occupants work activity, and flexible selections service in a workplace. In this study, we propose lighting zone operation system which controls various lighting levels and color temperature each zone according to occupants’ work style, so that working zones with various lighting environment are available according to the occupants’ preference.</p><p> In order to confirm the effect of lighting zone operation on occupants’ satisfaction and zone selection, experiments were conducted in an actual ABW style office where 129 people worked. The target office was divided into 3 zone spaces, “focusing zone”, ”buffa zone” and “relaxation zone”, and lighting zone conditions were designed as 1100lux/5500K in focusing zone and 750lux/3200K in relaxation zone. A series of questionnaire survey of satisfaction was conducted at the pre-operation, 1 month, 4 months and 1 year later from zone operation start and occupants’ zone selection was measured by Location Position System every 1 minute.</p><p> Regarding zone selection activities, it was found that there were some occupants’ types; some occupants frequently selected a specified working zone that they preferred, and some occupants sometimes changed working zones according the job situations and feeling. Moreover, since lighting zone operation started, more occupants who had preferred buffa zone before lighting zoning operation tended to shift to “focusing zone” and “relaxation zone”which were different from conventional working zone in lighting conditions. On the other hand, regarding consciousness of working zone selection, it was shown that 30% of occupants in the “focusing zone” and “relaxation zone” became to regard lighting conditions as one of factors for working zone selection. Thus, occupants didn’t consider lighting environment as important at the pre-operation, but gradually became to recognize lighting environment as significant. Regarding occupants’ satisfactions, it was shown that occupants’ satisfactions were highest at working zones which occupants usually selected, and at the same time some colleges with similar preference came to work at the same zone. As a result, dissatisfactions were improved from 21.6% to 2.2%.</p>

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