Korean Journal of Construction Engineering and Management (한국건설관리학회논문집)

Korea Institute of Construction Engineering and Management (한국건설관리학회)
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Development of a Conceptual Estimate Methodology for Plant Construction Projects

플랜트 건설 프로젝트를 위한 개산견적 방법론 개발

  • Kim, Hyun-Joong (School of Architectural Engineering, Korea University of Technology and Education (Koreatech)) ;
  • Choi, Jaehyun (School of Architectural Engineering, Korea University of Technology and Education (Koreatech))
  • Received : 2018.11.05
  • Accepted : 2018.12.11
  • Published : 2019.01.31
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Abstract

In the overseas plant construction market, the domain construction firms' construction capability has been greatly improved, but the capability of project management is evaluated to be insufficient compared to the technical aspect. Project management capabilities from the initial planning stage of project execution are regarded as the core competence of advanced construction companies. Among them, it is urgent to improve the capacity of conceptual estimate for domestic companies. In this study, the researchers surveyed and analyzed the methodology of estimating project cost in the planning phase of the plant project and developed an estimation method by conducting a case study analysis. Based on the logic of the cost index and parametric estimation method among the existing estimation methodology, the estimation tool was developed by deriving the input and output variables tailored to the plant project. The validity of the proposed methodology was evaluated by comparing the accuracy between the project estimate amount of the case project and the actual project amount. In order to increase the utilization of the developed conceptual estimate methodology,for plant construction project, it is necessary to systematize the data of the historical project data. Increasing the accuracy of future project cost estimates is directly related to increasing project award and profitability of the domestic construction company.

해외 플랜트 건설시장에서 국내기업의 기술적 위상은 크게 향상되었으나 기술적 측면에 비해 프로젝트 관리 측면의 역량은 미비한 수준으로 평가되고 있다. 프로젝트 관리 중 프로젝트 수행 초기인 기획단계에서의 사업관리 역량은 선진 건설 기업의 핵심 역량으로 볼 수 있으며, 그 중 초기 원가산정 기술은 국내 기업의 역량 향상이 시급하다. 본 연구에서는 플랜트 프로젝트 기획단계에서 진행되는 개산견적 방법론에 대해 조사 및 분석하고, 사례분석을 통해 개산견적 방법을 제시하였다. 기존의 개산견적 방법론 중 비용지수법과 변수견적법의 로직을 토대로 플랜트 프로젝트에 특화된 입출력 변수를 도출하여 개산견적 도구를 개발하였다. 제시된 방법론의 유효성은 사례 프로젝트의 개산견적 금액과 실적 프로젝트 금액 간의 정확도 비교를 통해 평가하였다. 개발된 플랜트 개산견적 방법론의 활용성 증대를 위해 실적 프로젝트의 체계적인 데이터화가 필수적이다. 향후 프로젝트 원가산정의 정확성을 높이는 것은 기업의 프로젝트 수주 및 수익확보와 직결되므로, 개발된 도구의 적극적 활용이 기대된다.

Keywords

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Fig. 1. Contract value for domestic construction market(Construction Association of Korea, 2015)

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Fig. 2. Scope of research for preliminary estimation

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Fig. 3. Research procedure

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Fig. 4. Accuracy range according to quotation classification(AACE, ACostE, PMI)

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Fig. 5. RS-MEANS cost database applied

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Fig. 6. Construction cost index (Korea)

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Fig. 7. Construction cost index (Korea)

Table 1. Case study project overview

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Table 2. Result of estimated amount

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Table 3. Result of final preliminary estimate

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Table 5. Range of accuracy

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