성과공개

1차

구성기술1

경상국립대학교

일반학술지

공공청사 개산견적 정확도 향상을 위한 공사비 영향요인 분석

한국건축 시공학회지

1598-2033

Vol.21 No.5

2021.10

조영호,윤석헌

A Conceptual cost estimate, which is computed in the preliminary step of a project, is important for
decision-making by a contractor in terms of the project budget, economic feasibility and validity
analysis, and alternative comparisons. Therefore, a high error rate of a prediction model for a
conceptual cost estimate can lead to various problems including excessive project expenditures and a
delayed break-even point. this study proposed optimal impact factors by configuring quantitative
impact factors computable in a preliminary step in various cases(combinations of impact factors).
subsequently, the accuracy of different cases was comparatively analyzed by using the cases as input
values of a prediction model using regression analysis. when the optimal combination of impact factors
proposed in this study and other combination of impact factors were applied to the prediction model,
the regression analysis-based prediction model exhibited 0.2-4.7% improvements in accuracy,
respectively. the optimal combination of impact factors proposed in this study improved the accuracy
of the prediction model of a conceptual cost estimate by removing unnecessary impact factor.