2019 Volume 75 Issue 3 Pages 158-171
The paper proposes a weighted optimal classification tree (WOCT) to classify condition ratings of public facilities. We can distinguish and avoid the fatal error, such as buildings in ‘bad’ condition are classified as ‘good’ condition, in WOCT. Furthermore, the deterioration survey was conducted on 32 public facilities in Matsuyama City, Ehime Prefecture. And we applied our method and found that it is possible to construct an optimal classification tree for careful judging of condition rating so as to avoid fatal misclassification without degrading the accuracy of the classification tree.