Based on the result of our previous paper, the purpose of this study is to clarify the spatiotemporal working patterns of discretionary labor in detail, and to propose the index of measuring and comparing the working mobility of individual labor. First, about 48 labors categorized in the 4 working styles, the features of their working time distributions are investigated by recounting the e-mail access log in each style. Next, the locations (longitude and latitude) of their external workplaces are specified based on the IP addresses recorded in the log file, and the zenithal map is drawn to confirm their spatial distribution using GIS. The relations between the distances from the office and amounts of work at the external workplaces are analyzed on the spatiotemporal distribution charts. Then, the distances are normalized by translating to the hyperbolic plan, and the working mobility index is formulated. The index is to give a certain dimension to the concept of “field of presence” substituted for “point of presence” in the post sedentary society.
