The purpose of this study is to extract defect-forecasting method by influencing factors of the apartment construction which become the nationwide concern due to recent tremendous casualties on korean apartment housing For this, the study tried to forecast defect occurrence by presenting a regression formula when the defect factors analysed to have affected the defect occurrence were interwoven with each other ; the construction company, the construction method and contract method As the regression formula for estimation of defect occurrence suggested in this study clearly is expected to include most of the major construction types available in korea, it will be of benefit as a useful and indispensable data for an improved level of defect management business that is facing with establishing of the specialized company for defect repair(or mending) and maintenance.
