• Korean Journal of Construction Engineering and Management
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• v.17 no.2
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• pp.70-79
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• 2016

The current remodeling cost estimation process is not only dependent on the historical data of new building construction, but it also has a poor linkage with risk-based estimation approach. As such, there is a high risk of falling short of initial budget. To overcome this, a risk-based estimation approach is necessary by providing a probabilistic estimation in consideration of the potential risk factors in conducting the remodeling projects. In addition, the decision-making process should be linked with the risk-based estimation results in stead of intuitive and/or experience-based estimation. This study provides a probabilistic estimation process for residential remodeling projects by developing a detailed methodology in which a step-by-step approach can be achieved. The new proposed estimation approach can help in decision-making for remodeling projects in terms of whether to proceed or not, by effectively reflecting the potential risk factors in the early stage of the project. In addition, the study can enhance the reliability of the estimation results by developing a sustainable estimation process model where a risk-based evaluation can be accomplished by setting up the cost-risk relationship database structure.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.73-80
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• 2001

Generally, construction management is classified into two categories in the construction industry; CM for fee and CM at risk, most project is executed by the construction supervision including construction management in CM for fee field in Korea. The division of work scope is complicated among construction manager(CMr) and difficult to implement the construction management efficiently by CMr. in this case. Therefore, it is desired to apply the specialized Project Management Information System(PMIS) systematically include construction management procedure. We propose the future development of construction management on construction site based on the analyzed problem with PMIS and guideline and CM concept on construction site, composition of CM procedure through this Jeonju World Cup Stadium CM project.

• Korean Journal of Construction Engineering and Management
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• v.10 no.2
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• pp.111-120
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• 2009

The conceptual cost estimation used the construction project needs for confirm budget not only at the planning phase but also at the preliminary design phase of the construction project. Present, the conceptual cost estimation model have problems the rate of error is very large because the linear simple model calculate by use the cost of the unit meter or the unit square. This study development the model used grouping and the key quantity method, the mixed unit cost for solve problem of the very large rate of error. The result of this study reduced difference of between the real design construction cost therefor it expect that contribute to the client or the service company estimate budget of RC rahmen bridge.

• Korean Journal of Construction Engineering and Management
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• v.25 no.2
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• pp.23-35
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• 2024

This study analyzed the correlation between each of the 12 influencing factors in FAR 16.04 and the decision-making process for construction contract types, using data from a total of 2,406 DoD Construction Acquisitions spanning from 2008 to 2022. The study considered 12 independent variables, grouped into 4 Characteristics with 3 factors each. Meanwhile, all other contract types were categorized into two types: Firm-Fixed-Price (FFP) and Cost-Reimbursement Contract (CRC), which served as the dependent variables. The findings revealed that FFP contracts significantly dominated in terms of acquisition volume. In line with prevailing beliefs, logistic data analysis and Analytical Hierarchy Process (AHP) analysis of Relative Weights from Experts' Survey demonstrated that independent variables like Uncertainty of the Scope of Work and Complexity found out to be increasing the likelihood of selecting CRC. The number of contractors in the market does indeed influence the possibilities of contract decision-making between CRC and FFP. Meanwhile, the p-values of the top 3 influencing factors on CRC from the AHP analysis-namely, Appropriateness of CAS, Project Urgency, and Cost Analysis-exceeded 0.05 in the binominal regression results, rendering it inconclusive whether they significantly influenced the construction contract type decision, particularly with respect to payment methods. This outcome partly results from the fact that a majority of respondents possessed specific experiences related to the USFK relocation project. Furthermore, influencing factors in construction projects behave differently than common beliefs suggest. As a result, it is imperative to consider the 12 influencing factors categorized into 4 Characteristics areas before establishing acquisition strategies for targeted construction projects.

• Korean Journal of Construction Engineering and Management
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• v.7 no.1 s.29
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• pp.168-175
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• 2006

Since the partly changed 'Private Investment Act for Social Infrastructure Projects' set forth in January 2005, the number of BTL(Build-Transfer-Lease) projects offered to the market has rapidly increased. The scope of BTL projects offered covers not only legally defined facilities but several facilities for the private schools. A BTL project, by definition, is a way of project management that includes the entire process of development such as planning, design, construction and operation over the period of 20-30 years. As a result, various types of risk may happen at each stage of the project and it is extremely important to efficiently control the sensitive factors that affect the risk profiles of the project. The examples of the sensitive factors are construction cost, interest rate, discount rate, lease amount, rental fee, O&M cost and so on. This study examines the characteristics of these sensitivity factors, analyzes their impact on the project feasibility and suggests the alternatives to manage them efficiently.

• Korean Journal of Construction Engineering and Management
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• v.8 no.5
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• pp.173-181
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• 2007

The domestic construction market is recently daunted because of the sustainable real estate regulation policy by the government. In other aspect, after the WTO(World Trade Organization)system opened overseas construction is growing continuously with grow of international economy and opening of market through world. Therefor needs to establish strategy on expansion or over seas construction competitive power. The purpose of this research is expansion on over seas construction competitive power by suggesting project cost guarantee methods to Owner and cost guarantee methods are Official Development Assistance(ODA). Accordingly, this research analyzed a developed $country^{\circ}{\phi}s$ ODA and domestic ODA. Moreover, survey to Expert of related field about over seas construction and ODA for identified problems. Especially, based on the results it intends to analyzed domestic ODA competitive power and improve strategy to competitive power of receive an order on over seas construction.

• Korean Journal of Construction Engineering and Management
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• v.18 no.1
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• pp.65-73
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• 2017

Today, the United States, Europe and other advanced organizations are utilizing the concept of competency-based HR management. Recently, many organizations in Korea are also managing workforces by introducing the concept of job competencies in personnel management. However, in spite of the current trend, domestic human resources management methods for construction managers continues to operate by asking about work experience, licensing, education level, etc. This is a seniority system and it functions separately from an assessment of practical job competencies for the business. Moreover, construction management work has been very fragmented in terms of expertise and capacity depending on the type of management work and project progress. Therefore, it is necessary to develop a competencies management system for each business segment to effectively manage job competencies that reflect the the characteristics of a construction manager' s work. As such, the aim of this study is to analyze human resources management methods pertaining to domestic construction managers and present challenges and limitations in current practices. In particular, factors affecting the job competencies of construction managers are analyzed statistically. The results of this study will be used as the basis for future research into development of a construction manager competency management system.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.300-305
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• 2002

The construction project is a complex undertaking involving multiple participants. Conflicts are inherently natural in the construction projects and subsequently, a success of projects mainly depends on how well to cope with the conflicts. In the past, courts usually took the position that the professional's exposure in damages for negligent performance of any of his/her duties would not extend to strangers to the contractual arrangement. However, courts today generally reject that rationale which was earlier in vogue and protect architects, engineers, and contractors from being liable to third parties. It means that the lack of privity of contract could rarely protect a profession in a suit alleging the negligence or professional malpractice in preparing plans or specifications. The main goal of this paper is to enhance the understanding of the legal aspect of privity and to provide the trend of no-privity disputes through the analysis of lawsuit cases during the last 40 years. On the base of the analysis, importance of the third relationship and the liability in construction disputes is presented.

• Korean Journal of Construction Engineering and Management
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• v.24 no.5
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• pp.22-34
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• 2023

Predicting accurately the construction cost budget in the early stages of construction projects is crucial to support the client's decision-making and achieve the objectives of the construction project. This holds true for public construction projects as well. However, the current methods for predicting construction cost budgets in the early stages of public construction projects are not sophisticated enough in terms of accuracy and reliability, indicating a need for improvement. The objective of this study is to develop a construction cost budget prediction model that can be utilized in the early stages of public building projects using an artificial neural network (ANN). In this study, an artificial neural network model was developed using the SPSS Statistics program and the data provided by the Public Procurement Service. The level of construction cost budget prediction was analyzed, and the accuracy of the model was validated through additional testing. The validation results demonstrated that the developed artificial neural network model exhibited an error range for estimates that can be utilized in the early stages of projects, indicating the potential to predict construction cost budgets more accurately by incorporating various project conditions.

• Journal of Internet Computing and Services
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• v.25 no.1
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• pp.123-136
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• 2024

The U.S. Department of Defense, leading global cybersecurity policies, has two main cybersecurity frameworks: the Cybersecurity Maturity Model Certification (CMMC) for external defense industry certification, and the Risk Management Framework (RMF) for internal organizational security assessments. For Republic of Korea military, starting from 2026, the Korean version of RMF (K-RMF) will be fully implemented. Domestic defense industry companies participating in projects commissioned by the U.S. Department of Defense must obtain CMMC certification by October 2025. In this paper, a new standard compliance meta-model (R3C) development methodology that can simultaneously support CMMC and RMF security audit readiness tasks is introduced, along with the implementation results of a compliance solution based on the R3C meta-model. This research is based on practical experience with the U.S. Department of Defense's cybersecurity regulations gained during the joint project by the South Korean and U.S. defense ministries' joint chiefs of staff since 2022. The developed compliance solution functions are being utilized in joint South Korean-U.S. military exercises. The compliance solution developed through this research is expected to be available for sale in the private sector and is anticipated to be highly valuable for domestic defense industry companies that need immediate CMMC certification.