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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Construction Engineering and Management
Journal Basic Information
Journal DOI :
Korean Institute Of Construction Engineering and Management
Editor in Chief :
Volume & Issues
Volume 16, Issue 6 - Nov 2015
Volume 16, Issue 5 - Sep 2015
Volume 16, Issue 4 - Jul 2015
Volume 16, Issue 3 - May 2015
Volume 16, Issue 2 - Mar 2015
Volume 16, Issue 1 - Jan 2015
Selecting the target year
Performance Review and Revitalizing Support Plans for Rural Residence though Current Status Survey
Park, Junmo ; Kim, Okkyue ;
Korean Journal of Construction Engineering and Management, volume 16, issue 2, 2015, Pages 3~11
DOI : 10.6106/KJCEM.2015.16.2.003
The urban has been improved houses and facilities as accelerating industry and society, while the rural area was inferior to the city. Furthermore, there was not a maintenance in time as ageing, and did not expect to rebuilding of using proper techniques and materials for financial reasons. This study find a way to make a revitalizing plan for appropriate real state. For this, perform a current status survey that 900 rural residences of 36 rural villages in Chungcheong area. As a result, Korean traditional structure is a half in residential type, and has poor residential conditions by comparison with western pattern. The structural type comprises two type that a pure structure and a mixed structure, and Korean traditional structure is a mixed structure more than a pure structure. It is considered continuous changes by a resident due to a pure structure was not satisfy various functions. It need appropriate plan to improve a rural residence for each characteristics.
The Influence Analysis of Value Engineering for the Public Empoyer's Decision Marking - Focused on the Project Life Cycle -
Park, Jongsoon ; Chun, Jaeyoul ;
Korean Journal of Construction Engineering and Management, volume 16, issue 2, 2015, Pages 12~20
DOI : 10.6106/KJCEM.2015.16.2.012
The public employers are faced the mounting importance of decision process to settle the optimum VE delivery system of such public facilities buildings and etc. The elements of decision process of the public employer are formed in the various relationships of the concerned and when the projects are coming into effect, the decision process in the VE delivery method and the selection of contractor will be the name of the game. The decision process in the VE delivery method and the selection of contractor are created a case to be one and the same as well as initiates a consistency for the performance. However, the function and role of the public employer are projective accordingly to the organization of employer and the employer especially no system is equal to the capability of perfect evaluation and verification of the ability of the employer. Especially the lowest bidder policy that started with justification to increase the competitiveness and technical capability of the contractors through the completion in between contractors has been providing the hotbed for insolvency, irregularity and irrationality as a result. From this point of view it is declared that the buildup the edifice of supporting system in the process of decision to recover the mutual trust and respect of the concerned in the VE delivery system with the technostress and the systematization based on drawing the elements which affect the decision process of public employer.
A Correlation Analysis of Influence Factors of Nonconformity in Construction Projects
Chi, Sungjoon ; Cha, Yongwoon ; Han, Sangwon ;
Korean Journal of Construction Engineering and Management, volume 16, issue 2, 2015, Pages 21~28
DOI : 10.6106/KJCEM.2015.16.2.021
Construction defects are major components that result in cost overruns and schedule delays in construction projects. There have been extensive research efforts to investigate the cause of defects. However, little effort has been devoted to analyze correlation among various reasons of construction defects while a defect is not usually an outcome of a single cause, but rather occurs when several interrelated causes combine. Based on this recognition, this paper analyzes 831 nonconformity reports collected from 30 construction projects in Korea from 2011 to 2014. The correlation analysis revealed that a significant portion of construction defects occurred in the procurement and construction phase and as the pattern of function defect and installation defect. Triggered by human error, defective material and faulty method, these defects are treated by conccession, repair, rework that can significantly lower the cost and schedule performance. This paper is significant in terms of providing a theoretical basis for analyzing correlation among various reasons of construction defects and quantitative measures for establishing effective defect prevention strategies.
Analysis of Factors and it's Effectiveness to Maintenance Cost of Public Buildings
Ko, Kyujin ; Cho, Sangouk ; Hwang, Jeongha ; Lee, Chansik ;
Korean Journal of Construction Engineering and Management, volume 16, issue 2, 2015, Pages 29~37
DOI : 10.6106/KJCEM.2015.16.2.029
Multi-household buildings are efficiently maintained from the mid- and long-term viewpoint according to the long-term repair coverage system etc. On the other hand, public buildings are not systematically maintained due to a lack of past maintenance cost data and inefficient budget plans, among other problems. Targeting public buildings in Incheon, this study analyzed operation costs variables. To verify the analysis results, they underwent a correlation analysis and a multi-regression analysis. With regard to public buildings electricity, gas and tap water cost, the influence power of the served life, floor area, and workforce were analyzed, revealing that electricity cost was highly correlated with workforce, while gas and tap water cost were correlated with tap water cost. Also, the correlation analysis results were verified through a multi-regression analysis, and a maintenance cost estimation model was presented using a regression equation.
Risk Value Calculation Method for Moderate Risk Concentration Type at Qualitative Risk Analysis Phase
Kim, Seon-Gyoo ;
Korean Journal of Construction Engineering and Management, volume 16, issue 2, 2015, Pages 38~45
DOI : 10.6106/KJCEM.2015.16.2.038
The risk analysis phase of construction risk management process is subdivided into the qualitative risk analysis that plays a major role, and the quantitative risk analysis acting as a supportive role. The traditional calculation method for quantifying a risk value that has been applied so far is an equation to multiply a probability by an impact simply, but its result shows the low risk value biased distribution. Although another equation that shows the high risk biased distribution as an alternative of traditional method was proposed, both of the low or high risk biased equations do not match with the statistical general knowledge that most natural phenomenons are close to the normal distribution. This study proposes a new risk value calculation method that is concentrated to the moderate risk value. Because the risk value distribution by a new method shows a normal shape similar to natural phenomenon, it helps to choose a middle level not biased to the low or high levels when choosing the level of risk response. Furthermore, it could contribute to improve the flexibility and rationality of risk analysis method by providing additional options for the risk value calculation.
A Study on the Statistical Continuity of Electrical Construction Cost Index Applied Chain Method
Park, Houng-Hee ;
Korean Journal of Construction Engineering and Management, volume 16, issue 2, 2015, Pages 46~53
DOI : 10.6106/KJCEM.2015.16.2.046
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.
Analysis of the Level and Competence Factors on Specialty Contractors' Employees
Hong, Sung-Ho ; Jung, Dae-Woon ; Oh, Chi-Don ;
Korean Journal of Construction Engineering and Management, volume 16, issue 2, 2015, Pages 54~64
DOI : 10.6106/KJCEM.2015.16.2.054
It is required to be enhancement of competitiveness for specialty contractors' employees due to specialty contractors are in charge of the actual construction work. The effective educational program for specialty contractors' employees is essential to improve the work performance of them. Therefore, the purpose of this study is to analyze level of work performance and find factors of core competence for specialty contractors' employees that can be utilized for development of effective educational program. The survey is based on CEO, Engineer and Manager in specialty contractors, and a questionnaire survey was performed to investigate the importance of job task, work load and degree of work difficulty as well as their core competence needs. The analysis result of this study can be utilized for development of effective educational program which is reflected the characteristics of specialty contractor's employees.
Predicting the success of CDM Registration for Hydropower Projects using Logistic Regression and CART
Park, Jong-Ho ; Koo, Bonsang ;
Korean Journal of Construction Engineering and Management, volume 16, issue 2, 2015, Pages 65~76
DOI : 10.6106/KJCEM.2015.16.2.065
The Clean Development Mechanism (CDM) is the multi-lateral 'cap and trade' system endorsed by the Kyoto Protocol. CDM allows developed (Annex I) countries to buy CER credits from New and Renewable (NE) projects of non-Annex countries, to meet their carbon reduction requirements. This in effect subsidizes and promotes NE projects in developing countries, ultimately reducing global greenhouse gases (GHG). To be registered as a CDM project, the project must prove 'additionality,' which depends on numerous factors including the adopted technology, baseline methodology, emission reductions, and the project's internal rate of return. This makes it difficult to determine ex ante a project's acceptance as a CDM approved project, and entails sunk costs and even project cancellation to its project stakeholders. Focusing on hydro power projects and employing UNFCCC public data, this research developed a prediction model using logistic regression and CART to determine the likelihood of approval as a CDM project. The AUC for the logistic regression and CART model was 0.7674 and 0.7231 respectively, which proves the model's prediction accuracy. More importantly, results indicate that the emission reduction amount, MW per hour, investment/Emission as crucial variables, whereas the baseline methodology and technology types were insignificant. This demonstrates that at least for hydro power projects, the specific technology is not as important as the amount of emission reductions and relatively small scale projects and investment to carbon reduction ratios.
A Study of Error Analysis for Post Evaluation System on the Construction Projects
Kim, Kyong-Hoon ; Lee, Du-Heon ; Kim, Tae-Yeong ;
Korean Journal of Construction Engineering and Management, volume 16, issue 2, 2015, Pages 77~85
DOI : 10.6106/KJCEM.2015.16.2.077
The data are often missed and many errors of the data are generated in the input process for the post evaluation system on the construction projects, and the reliability of the data falls down much. Accordingly, the detailed analysis about missing and error of data was conducted to ensure reliability of the analysis results about post evaluation on the construction projects. As results in this study, a lot of input data were missed at the initial construction phase, and the data errors were found in the inaccuracy of reference reports, the lack of understanding about input data, and the failure of KRW unit.
Development of Evaluation Criteria for Real Estate Development Projects
Kim, Sung-Il ; Bae, Yu-Jin ; Chang, Chul-Ki ;
Korean Journal of Construction Engineering and Management, volume 16, issue 2, 2015, Pages 86~96
DOI : 10.6106/KJCEM.2015.16.2.086
Real estate market has rapidly grown by active use of project financing in the early 2000s. However, many projects have been in trouble due to global economic recession after that period. It is mainly because those projects were pushed forward a business without comprehensive business feasibility analysis. This paper investigated current evaluation system for real estate development projects and then introduced new evaluation system including evaluation factor and criteria for real estate development projects to prevent implementation of the project without business value and to be able to evaluate potential projects in objective manner. This new evaluation system for real estate development projects can be applied to any type of real estate development projects by modifying evaluation items and weighting factor in accordance with the type and characteristics of project. Through the new evaluation system, the evaluation process for real estate development projects will be able to be standardized, be consistent, and the results of evaluation can be accumulated in consistent way.
Integrated Information Management for Composite Object Properties in BIM
Kim, Karam ; Yu, Jungho ;
Korean Journal of Construction Engineering and Management, volume 16, issue 2, 2015, Pages 97~105
DOI : 10.6106/KJCEM.2015.16.2.097
Building information modeling (BIM)-based construction projects have increased and become more varied, and as such the management of BIM-based facility information is also increasingly important for facility maintenance. Information management, and specifically product data mapping, however, has some problems in the area of manual data entry and does not adequately consider the exchange requirements of facility maintenance. Therefore, it is necessary to introduce a method to improve the management of composite object information for BIM-based facility maintenance so that it can handle construction operation building information exchange (COBie) data for a composite object. Therefore, we present a method to map COBie data to related materials of a composite object. This research contributes to increasing the efficiency and accuracy of the required information mapping between a building model and product data using a BIM library through optimal BIM data adoption. Moreover, it allows for the creation and management of specific product data at the design development phase.