Abstract
In this paper, we extend our investigation of the reasonable number of sanitary fixtures in schools which we had mentioned in our previous paper. The contents are as follows : 1. Investigating the children's behaviour using lavatories in a kindergarten and an elementary school, we analysed the distributions of using-times, using-frequencies and simultaneous uses of sanitary fixtures. 2. Simulation method was applied for the calculation of the number of sanitary fixtures, therefore we analysed several arrival distributions at the lavatories in recesses of ten minutes between lessons, and suggested one of the arrival distribution models. 3. In addition to the above-mentioned arrival distribution, we suggested several conditions for the calculation which included not only the using-times and the using-frequencies but also the three levels of maximum waiting time as the evaluating index for the decision of the reasonable number. 4. As the results of the calculation, we showed the reasonable number of urinal for male and that of closet for female in elementary, junior high and senior high schools in each of three levels.
