Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
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Presumption Method for Optimum Correction Rate of Total Construction Cost Using the Median based on Historical Data Analysis in Public Office Buildings

공공건축물 실적자료 분석에 따른 중위수를 활용한 총공사비의 적정보정율 추정방법

  • Yim, Jin-Ho (Graduate School, Chungbuk National University) ;
  • Park, Jun-Mo (Institute of Construction Technology, Chungbuk National University) ;
  • Kim, Ok-Kyue (Department of Architectural Engineering, Chungbuk National University)
  • Received : 2014.01.08
  • Accepted : 2014.06.16
  • Published : 2014.10.20
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Abstract

There is growing difference between a planned value and an actual cost for increasing as an risk of construction cost. A construction cost index is an alternative to redeem a problem, but it is still very difficult to reduce an actual differential as a price fluctuation. Furthermore an existing theory of a construction cost index is overly complex, and is unsuitable for using in working-level. This study suggests an optimum correction rate in respect of a total construction cost. It is analyzing the actual cost of 53 public buildings that the Public Procurement Service ordered. The objects are main processes that include architectural works, mechanical works, electrical works, telecommunication works, and service facilities. It is compared a total construction cost based on absolute error rate using the median from frequentist principle. For this, it is selected the suitable regression model and set a correction rate.

본 연구는 공공건축물의 실적공사비 분석을 통해 총공사비에 대한 적정보정율을 기초자료로 제시하고자 한다. 이에 대해 조달청에서 발주한 2009~2011년에 준공된 53개 프로젝트를 연구 대상으로 하였다. 공사비 분석은 주요 공정인 건축, 기계, 전기, 통신, 부대시설에 대하여 빈도론적 관점에서 중위수를 활용한 절대오차율을 기반으로 총공사비에 대해 비교 분석하였다. 이를 통해 적합회귀모형을 선정하고 보정율을 책정하였다.

Keywords

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Cited by

  1. Cost Estimating Method of Public Building Construction through Construction Scale vol.15, pp.3, 2015, https://doi.org/10.5345/JKIBC.2015.15.3.307
  2. Construction Cost Estimate Model Based on Process Costing System vol.31, pp.7, 2015, https://doi.org/10.5659/JAIK_SC.2015.31.7.91