• Korean Journal of Construction Engineering and Management
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• v.24 no.4
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• pp.25-34
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• 2023

The purpose of this study is to calculate and compare construction costs for On-Site Construction and Off-Site Construction in Plant Project. For this purpose, the target for calculating the construction cost was limited to the Pipe Rack(Steel Structure and Piping). The results derived according to the purpose of the study are as follows. 1)The direct construction cost for On-Site Pipe Rack construction was KRW 56 billion, with Steel Structure KRW 25.1 billion and Piping KRW 30.8 billion won. 2)Comparing the rate of change between On-Site Construction and Off-Site Construction, material costs increased by 1.9% and expenses by 192.1%, but labor costs decreased by -9.1%, resulting in a total direct construction cost increase of 8.4%. These results can be used as reference data to check the current status of the increase or decrease in construction costs when constructing Pipe Racks as Off-Site Construction.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.3
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• pp.1474-1480
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• 2013

This study attempted to estimate construction costs in accordance with the resource-based cost estimation (unit cost price) system by diameter for TBM method, and analyzed the direct cost and the total cost. Based on such figures, this study performed a regression analysis and proposed a model for an equation for estimating construction costs. model for the resource-based cost estimation (unit cost price) system classified by diameter for TBM method proposed by this study can be effectively applied to business planning, preliminary investigation, feasibility study, construction cost estimations in the early design stages.

• Korean Journal of Construction Engineering and Management
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• v.23 no.3
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• pp.25-35
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• 2022

The purpose of this study is to derive risk events that occurred during aircraft runway construction and analyze loss costs for project participants. For this purpose, design change data, contracted statement and completed statement were investigated. The results of this study are as follows: There were 12 risk events in the process of construction, 5 design errors and 7 construction errors. The increased construction costs due to such risk events were calculated as KRW 726 million. Of the KRW 726 million that was increased due to risk events, about 52.57% was spent by the ordering agency, and about 47.43% contractors. The increased construction costs due to such risk events are about 4.86% of the direct construction costs of KRW 14.9 billion. Based on the results derived from these case studies, a method for estimating reserve costs and construction costs considering risk events is presented.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.6D
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• pp.637-643
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• 2012

This research collected work drilling report of TBM method site developed by WRITH company to TBM equipment company in Germany and analyzed work operating productivity. Based Oil the data analyzed TBM operating productivity, This research derived and presented excavation speed (m/day) by TBM diameter (3.0m, 3.5m, 3.8m) and rock. Also, based on the excavation speed (m/day) by TBM diameter, This research estimated a day direct construction cost and total direct construction costs by applying a direct construction cost which spent on per 1m. When we perform a similar geological construction in the future, excavation speed and direct construction cost which were derived by TBM diameter and rock is thinking the effective utilization data to estimate construction cost and plan schedule management before the start of construction.

• 월간 기계설비
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• no.10 s.195
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• pp.38-48
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• 2006

정부등 공공기관에서 시행하는 건설공사 예정가격 작성시 적용되는 2006년 하반기 실적공사비 적용대상 공종 및 단가 931개(기계설비 216, 건축 335, 토목 350)가 지난 8월 14일 공표되었다. 실적공사비 단가는 재료비, 노무비, 직접공사 경비가 포함된 공종별 단가를 계약단가에서 추출하여 유사공사의 예정가격 산정에 활용하는 방식으로 공공건설공사의 예정가격 작성시 적용되고 있다. 또한 실적공사비 단가는 공공건설공사의 설계조건이 유사한 공종을 대상으로 계약단가가 설계단가 대비 ±25% 범위 내의 단가로 2006년 하반기 실적단가 설계가 대비 평균 낙찰률이 70% 수준이다. 대부분의 공공기관에서 예정가격 작성시 적용하고 있는 실적공사비 단가는 종전의 표준품셈에 의한 예정가격 작성시보다 공사예정가격이 낮게 산정되고 있다. 따라서 설비건설업계도 이를 감안하여 반드시 적정공사비를 확보할 수 있는 금액으로 입찰에 참가해야 한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.12
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• pp.2121-2125
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• 2006

This paper shows the calculation system of construction cost rate to telecommunications engineering service that is based on the tenth article of the Engineering Technique Promotion Law. The existing construction cost rate had been calculated using the experiential statistics or quoted the foreign construction cost rates. This paper apply the theoretical method to calculate the construction cost rate instead of the existing method. To calculate it more reasonably, this paper apply the characteristic own of the current construction cost rate. The result of this paper can be introduced to calculate the construction cost rate for the telecommunication engineering service.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.2120-2121
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• 2011

현재 정부가 추진하고 있는 전기분야 실적공사비 적산제도와 관련된 최근의 움직임은 당초의 취지와 달리 실적공사비에 대한 개념 부족과 임의적 해석 등으로 실적공사비 적산제도 도입의 바람직한 방향성에도 불구하고, 실적단가 축적의 기초 자료인 계약내역서의 직접 공사비 낙찰률 적용 관계 등 실적단가의 적정성에 대한에 근본적인 접근보다 예산절감, 물가안정 측면으로 접근하여 시장단가 반영에 대한 왜곡현상이 발생 할 수 있는 제도상의 문제점으로 실적단가 축적에 대한 적정성 판단에 따른 실적단가의 보정 수단이 미약하여, 현행 법제도 하에서 실적단가의 적정성 확보를 위한 대응 방안을 제시하여 실적공사비를 정착시킬 필요가 있다. 왜냐하면 품셈에 의한 문제점 등으로 실적공사비 적산제도로 공공 건설공사의 예정가격산정 방식을 전환 하였다고 볼 때, 본 제도의 실패는 또 다른 제도로의 전환 또는 보완이 필요하다고 판단된다.

• Korean Journal of Construction Engineering and Management
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• v.10 no.2
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• pp.132-144
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• 2009

In this study, the basic data for calculating the proper construction cost as minimizing the uncertainty at the stage of forecasting construction cost with the basis of the analysis on the actual construction cost within completed domestic public apartment house. In this regard, 23 public apartment houses by each region which were ordered by the Korea National Housing Corporation and completed from 2004 to 2007 were selected as the objects of study. Four works such as common temporary installation, construction work, civil work and machine/equipment work which are the important direct cost items based on the actually inputted and settled construction costs were classified by completion year, region, architectural area, and the distribution type considering inflation rate. The sequent actual construction costs per 3.3m2 were compared and analyzed by each work, the proper construction costs were analogized and the calculating formula were presumed with the basis of average actual construction costs to be analyzed and presented.

• Korean Journal of Construction Engineering and Management
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• v.7 no.2 s.30
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• pp.53-61
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• 2006

Korean Government started to publish Korean CCI(Construction Cost Index) again at February 2004 since CAK(Construction Association of Korea) stopped publishing it 1994. CCI is developed using the verified statistical data, that is, input-output table and producer price index by Korean Bank and labor unit cost by CAK. Though the method is available as it uses the verified statistical data, there is a limitation to reflect the characteristics of construction. For overcoming this limitation, this study suggests CCI development method investigating the input structure of labor and material cost for each type of construction project and applying the cost variations of the items.

• Journal of the Society of Disaster Information
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• v.8 no.4
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• pp.328-335
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• 2012

The resource-based estimating based on standard unit price of construction work was estimated by multiplying the price per standard unit of work on the amount of labor, material, equipment use time. However, limitation of the resource-based estimating way does not adequately reflect the actual transactions prices. On the subject of water tunnel excavation as a new attempt to overcome these limitations, this study analyzed productivity by work type into cutter inspection/ exchange, TBM maintenance, TBM inspection/refueling, subsequent installations, tramcar, operating change, a cave-underground reinforcement / rock reinforcement, safety / meetings and analyzed actual cost estimating and the net advance rate based on this analysis result. Actual cost estimating calculation approach presented in this study can be utilized as a useful tool to predict the actual cost estimating in the TBM water tunnels field.