Abstract
Interior/facilities system for multi-unit residential building, which can be installed easily by multi-skilled workers, was developed. This system is characterized by the prefabricated components, the integration of the facilities and the interior, and rationalization of the construction. In order to compare the work efficiency of this system with conventional construction, the efficiency measurement by a work-sampling method was carried out through the actual construction.Work time of the developed system was 3% more than that of conventional construction.