• Title/Summary/Keyword: 건설공사비지수

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A Study on Development of Cost Index Model for Military Facilities Construction (군 시설공사의 공사비지수 개발에 관한 연구)

  • Park Jong-Won;Son Bo-Sik;Lee Hyun-Soo
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2004.11a
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    • pp.256-260
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    • 2004
  • As a large portion of defence budget are alloted for military facility construction, reasonable budget estimation in the planning stage has been officers' main concerns. However the proper estimation of construction cost is difficult to be carried out due to the absence of systematic criteria. To improve the budget estimation for military facility construction, this study proposes a cost index model which can convert historical cost to current cost. Thus the developed cost index would enhance effectiveness of budget estimation process 3nd support reasonable decision making. This cost index model is developed by analyzing historical cost data with statistical methodology The study is executed by following process. First, factors which affect construction cost for the most are selected by analyzing historical cost data. second, the selected factors are categorized material cost, labor cost and equipment cost, and weights of those factors are calculated by dividing the cost of each factor by total item costs. Last, cost index is developed by using weighted average method.

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The Rationalization through Comparative Analysis of Price Fluctuation Adjustment Method (물가변동 조정방법의 비교분석을 통한 합리화 방안)

  • Kim, Seong-Hee
    • Korean Journal of Construction Engineering and Management
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    • v.13 no.1
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    • pp.67-76
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    • 2012
  • There are index adjustment method and item adjustment method in estimation methods for price fluctuation rate of public constructions. A relevant regulation has put item adjustment method as a principle, but in most construction, contract sum adjustment has been made by index adjustment method. Hence, this study, by figuring out width and causes of the gap between index adjustment method and item adjustment method through direct comparative analysis, solved inequality caused by difference between them and suggested a rational way against irrationality of each method. For building operations of public housing construction, a detailed fluctuation rate by index adjustment method and item adjustment method of construction cost elements of the same construction, that is, direct material cost, direct labor cost and historical construction cost was estimated to analyze difference between two adjustments and establish its cause. Across the analysis, it was found that fluctuation rate by item adjustment method was estimated lower than that by index adjustment method and difference between methods for estimating fluctuation rate of quotation unit price and application of index unrelated to construction type and construction nature are main causes of the difference. This study has a significance in that, for smooth contract sum adjustment between contracting parties, it practically proved the real difference between adjustment methods by conducting comparative analysis of the difference in direct correspondence way.

A Study on the Prediction-Formulas of Approximate Estimate Based on Actual Work Cost for Subway (실적공사비에 의한 지하철 공사비 예측모형에 관한 연구)

  • Park, Jong-Hyuk;Jeon, Yong-Bae;Park, Hong-Tae
    • Journal of the Society of Disaster Information
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    • v.9 no.1
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    • pp.11-21
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    • 2013
  • This study proposed cost prediction equation model by considering duration, construction, size, actual cost with the subway construction started by the actual cost system which was introduced since 2004. Costs - scale exponent n(confidence range: 0.5 to 0.7) for cost prediction of subway construction was drawn total cost(0.713), net cost(0.77) in point of the 11 subway construction data. The cost prediction equation model of the subway construction which was presented in this study is able to effectively apply to business planning, preliminary investigation, feasibility study, basic design stage to estimate the approximate cost in the future.

A Study on the Statistical Continuity of Electrical Construction Cost Index Applied Chain Method (전기공사비지수의 산정방식 변경에 따른 통계연속성 실증분석 연구)

  • Park, Houng-Hee
    • Korean Journal of Construction Engineering and Management
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    • v.16 no.2
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    • pp.46-53
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    • 2015
  • Electrical construction cost index is composed of the cost of albor and material. The producer price index is used to the cost of material. The Bank of Korea restructured the formation method and the basic period of the producer price index in 2013. Because fixed-weighted method can't faithfully reflect industrial structure changes. The weighted value and price index of fixed-weighted method is fixed on the basicp eriod. Electrical construction cost index is changed from fixed-weighted method to chain-weighted method in september 2014, because of these on the need. But the change of organization in formation method changes the weighted value. So there is the need of analysis about the statistical continuity of electrical construction cost index. This study is focused on the time series analysis between fixed-weighted and chain-weighted electrical construction cost index. We uses unit root test, cointegration test, regression analysis of long and short term equation, fitness for the estimation of static forecast as time series analysis. We verify that chain-weighted electrical construction cost index can be replaced to fixed-weighted construction cost index accounting analyses result. So users of it recognize that chain-weighted electrical construction cost index has statistical continuity.

A Case Study on the Prevention of Construction Delays Using the Delay Management Index in Program Level Construction Projects (프로그램 수준 건설사업에서 지연관리지수(Delay Management Index)를 활용한 공사지연 예방 사례연구)

  • Yu, Jun-Hyeok;Kim, Ok-Kyue
    • Journal of the Korea Institute of Building Construction
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    • v.21 no.4
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    • pp.347-359
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    • 2021
  • Recently, construction projects have emerged in the form of program management, which is complicated by the large-scale of construction, and requires astronomical construction costs. In particular, projects that absolutely require management at the program level, such as large-scale construction projects, require overall control of the planned schedule and cost as a set of various projects, including infrastructure. But in Korea, there is no specific management standard for delays in construction. In order to avoid the risk of cost increase and project delay in the program-level construction project, it is necessary to apply more systematic management standards to prevent delay and to take a more preemptive response in the construction process. Therefore, in this study, a delay management index (DMI) was developed to successfully carry out large-scale construction projects at the program level and prevent delays in advance. In addition, case studies were conducted for large-scale construction projects, and a delay prevention system was established for program-level construction projects.

Case Study on Development of Residential Building Cost Index Compilation Model (주택원가지수 산정모델 작성 사례연구)

  • Cho Hun-Hee;Lee Yoo-Seob;Kang Tai-Kyung
    • Korean Journal of Construction Engineering and Management
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    • v.4 no.4 s.16
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    • pp.220-226
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    • 2003
  • The Residential Building Cost Index which presents price variation of construction resources required in a residential building project in single value, has been compiled to evaluate appropriate level of the price variation. This research reviewed the compilation methodology for Residential Building Cost Index based on comparative analysis on domestic statistics and proposed the Residential Building Cost Index through a variety of case studies. It would facilitate monitoring the price variation of a residential building cost and contributes to enhancing the applicability of construction cost data.

A Study on the Estimation of Elemental Costs for an Apartment Building (공동주택에 대한 부위별 공사비 산정에 관한 연구 - 사례 H사의 실행단가를 중심으로 한 연구 -)

  • Kang, Hyun-Wook;Yoo, Jong-Hwan;Kim, Yong-Su
    • Korean Journal of Construction Engineering and Management
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    • v.8 no.2
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    • pp.173-181
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    • 2007
  • The purpose of this study is to estimate elemental costs of an apartment building. The adapted research method includes a case study from $^{\circ}{\AE}H^{\circ}{\phi}$ construction company. The results of this study are as follows: 1) An elemental cost format of an apartment building is proposed, 2) An elemental cost table based on a case study of $^{\circ}{\AE}H^{\circ}{\phi}$ construction company is suggested.

Tunnel Cost Estimating Model Based on Standard Section and Cost Variance Index (I) - Analysis Of Critical Cost Factors - (표준단면을 이용한 터널 공사비 예측모델 개발 (I) - 공사비 영향요인 분석 -)

  • Cho, Jeongyeon;Kim, Kyong Ju;Kim, Kyoungmin;Kim, Sang Kwi
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.28 no.5D
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    • pp.665-675
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    • 2008
  • The objective of this paper is to provide an approximate cost estimating model for tunnel that can be utilized both in quick construction cost estimating for design alternatives, and in evaluating efficiently the cost effects according to the environmental changes during design and construction stage. To meet this requirement, this study analyzes critical cost factors influencing tunnel construction costs. The cost factors include 7 elements such as rock drilling method, advancing method, type of detonator, loader capacity, unit weight and soil volume change factor, length of tunnel. This paper investigates the cost variance according to the change of the cost factors. The result is expected to be used in formulating approximate tunnel cost estimating model.

The Study on the System to Estimate the Cost by Using Regression in the Early Stage of the Project (공사 초기단계에서의 회귀분석을 이용한 최종공사비(EAC) 추정 방법)

  • Lee, Youn-Mi;Lee, Man-Hee;Lee, Hak-Ki
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2006.11a
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    • pp.274-277
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    • 2006
  • The EAC(Estimate at Completion) among existing methods, which estimate cost and time effectively, help managers anticipate changeable several results at the point of $15{\sim}30%$ in the project progress. However, this method may cause such some problems as not to consider the periodically changing circumstances caused by construction risks or uncertainties which can affect the cost and time in the project, and to regard collected and accumulated data only as a single value when predicting the results on the progress. Accordingly, it is very difficult to accept the even small range of variability based on the anticipation of EAC. Consequently, the study focuses on the possibility methodology to anticipate time and cost accurately on the way to utilize EVMS(Earned Value Management System), and also suggest the way to perform the right estimation of EAC as considering various risks and uncertainties in construction projects.

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A Validation on Estimate at Completion Evaluation Methods of EVMS (EVMS에서 최종예상공사비(EAC) 평가방법에 관한 검증)

  • Park Eun-Jin;Kim Soo-Yong;Hwang Hyo-Soo
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • autumn
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    • pp.405-410
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    • 2002
  • Earned Value Management System(EVMS) has been institutionalized as an advanced management technique of construction project lately. And its research has been in the active progress in order to utilize the earned value concept as a project management tool for construction project ordered by both government and private sector. However it is necessary to test and prove the EVMS's adaptability to our construction environment by EVMS's several of operations before its introduction. Project forecasting phase of EVMS is the Estimate at Completion by utilizing earned value data. So, the purpose of this study is to propose EAC evaluation method for evaluation the accuracy of the EAC and encouraging cost realism, and to test for proving the validity of the evaluation methods through hypothesis testing.

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