Today, it is an urgent necessity to improve on construction work. In the housing construction, it will not too long before new foundation method with pre-fabricated members is put into practical use. To learn actual condition of working time helps us to evaluate the productivity of new foundation method. In this report, the process of the foundation work for detached housing at site was analyzed. The result of time study shows the standard working time can be determined by five factors : the length of wall footing, the side area of wall footing, the number of compartment, the number of crossing and protrusion of wall footing and pre-fabricated reinforcement ratio.
