Abstract
The purpose of this study is deduction of finishing area approximate estimating equation by apartment houses element for the finishing material takeoff and application according to the performance requirements by building. For this purpose, Understand building materials of approximate estimating methods and deduct the problem of approximate estimating by limited the range of study to the apartment houses and analyze a needed component and process of finishing material design and investigate research status. then select a finishing material using bill of quantity and architecture drawing of apartment building and suggest finishing area approximate estimating equation by apartment houses element for prediction cost estimation or environmental load assessment. furthermore perform deviant-case analysis for decision the possibility of application about suggested finishing area approximate estimating equation. as a result, in case make a comparison between quantity from bill of quantity and quantity from finishing area approximate estimating equation, survey figure show 10.08% measuring efficiency in common use space and 8.15% measuring efficiency in residental space. in addition, analyze result sorted by finishing material, show 6.75% measuring efficiency.