In the construction industry, many individual trades have to work concurrently. This creates many potential difficulties on the construction site, primarily in relation to efficiency loss and construction period extension. We conducted process analysis in the observation of medium sized apartment house interior finishing works. By analyzing the work process we made a process chart of interior finishing and building services works that can be used for work improving job. In the paper we measured the man-hours of each process. We categorized the man- hours into four : main work, adjective work, extrinsic work, and allowance. By using these data we clarify the job characteristics, and carried out further analysis.
