Abstract
This paper shows the simulation model to explain and estimate the efficiency of office space, and the fact that the efficiency is mainly decided by the organization system of office spaces, organization system of staffs and its annual change. The concept of this study and outline of this model have been published in "study on the flexibility in the office space" by Koichiro Okamura and Motohiro Yano, Trans. of A.I.J. No.297, Nov. 1980 Based on this report, here the further developed model is applied to simulate three prefectural offices in Kumamoto, Oita and Kagoshima in Japan.