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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 13, Issue 6 - Nov 2012
Volume 13, Issue 5 - Sep 2012
Volume 13, Issue 4 - Jul 2012
Volume 13, Issue 3 - May 2012
Volume 13, Issue 2 - Mar 2012
Volume 13, Issue 1 - Jan 2012
Selecting the target year
A Study on Development of BIM-based Asset Management Model for Maintenance of the Bridge
Kang, Jong-Min ; Lee, Dong-Youl ; Park, Jong-Bum ; Lee, Min-Jae ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 3~11
DOI : 10.6106/KJCEM.2012.13.5.003
The most of domestic bridge has an used life under 30 years, Future maintenance budgets can be expected to increase. However, because of bridge maintenance budgets are limited, demand for asset management being performed to achieve required performance within available budget is increasing. To perform effective asset management of bridges should be made the best use of information to occur in all phase of construction project. Therefore, the development of system and DB is required to support asset management by effective information management. The objective of this study is the development of the BIM-based bridge asset management model. Through previous research survey, BIM capabilities and asset management components were established and mutual linkages were examined. Bridge asset management model was composed of alternate assessment model. In addition, BIM-based asset management model was performed case studies to verify feasibility and applicability. The proposed model can be applied to a current bridge maintenance procedures and supported to perform effective bridge maintenance tasks within a limited budget.
Analysis and Quantitative Estimation of Risk Factors of Design-Build
Oh, Guk-Yeol ; Lee, Young-Dai ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 12~24
DOI : 10.6106/KJCEM.2012.13.5.012
The Risks in undertaking a construction project comes from many sources and often involves many participants in the project. This study has identified various kinds of risks, assessed the risk factors quantitatively and suggested risk management method for response pertinent in Design Build(Turn Key)type of projects in Korean context. A questionnaire was designed comprising of 145 possible risks in all types of construction projects. The population from owner, consultant and contractor groups was asked to indicate the risks applicable in DB projects. 25 numbers of critical risks in DB projects were identified and further analyzed for reveling inherent relationship between them through factor analysis. Factor analysis revealed 8 risk factors in DB projects. Construction site related, contract related and design related risk factor consisted about 72% of total risk weight. It has been found out about 6%, while considering the mutual dependency, it is about 10% of total cost of DB project. Therefore, It is suggested that 6% to 10% of construction amount as contingency has to be made provision for risk responses in the DB projects.
A Comparative Analysis of Supplier's Profitability According to the Different Sales Timing in Apartment Housing
Kim, Seong-Hee ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 25~34
DOI : 10.6106/KJCEM.2012.13.5.025
It has been five years since the Post-Construction Sale System of Housing was introduced. The purpose of this study is to identify objectives and effects of the Post-Construction Sale System of Housing and analyze change of profitability at different sales time from a supplier's point of view. Apartment buildings construction projects performed in Seoul are used for the case study. The present value of sales revenues, sensitivity and the present value of expected sales prices are analyzed. According to the findings, first, profits made from a Pre-construction sales system was 5.1%~6.2% higher than those from a Post-construction sales system. Among four plans of a Pre-construction sales system (A, B, C and D plan), sales revenue from the A plan, which takes a deposit at the time of starting construction, was the greatest. Second, increase of the rate of discount and decrease of sales revenues are in direct proportion. The bigger rate of discount leads actual reduction of sales revenues. Third, for the present value of sales revenues reflecting change in basic model construction cost, a Pre-construction sales system showed a little higher than that of a Post-construction sales system by approximately 2%. It should be known that this study suggests profitability of Pre-and Post-construction sales system by clearly measuring them in the supplier's point of view and calculates sales revenues, considering change of a sale price following change of sales time.
Fuzzy Based Condition Assessment Model of Middle and Small-Size Buildings
Jo, Hyeon-Wook ; Jeong, Ji-Seong ; Jung, In-Su ; Lee, Chan-Sik ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 35~44
DOI : 10.6106/KJCEM.2012.13.5.035
In the current maintenance system of building, safety inspection and precise safety diagnosis have been applied only for Type 1 and 2 buildings. Considering the fact that middle and small-size buildings take up 99.4% of total buildings, it is necessary to implement safety diagnosis for the buildings to make long lasting buildings. This study suggested improvement methods for adjusting the existing evaluation items to middle and small-size buildings by reviewing the current diagnosis system and a survey. Based on the methods, an improved model, which modified the existing diagnosis model, was developed by applying fuzzy theory. If the improved model of this study is applied on site, the buildings except Type 1 and 2 could be maintained constantly. In the future studies, it is necessary to implement the developed model practically, to strengthen the feasibility of the model.
A Basic Study on Review the Classification System and the Process of BIM Information for an Automatic Review of Building Code
Lee, Chang-Yoon ; Shim, Un-Jun ; Ahn, Yong-Sun ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 45~52
DOI : 10.6106/KJCEM.2012.13.5.045
Recently, BIM is used at several areas actively because of introduction of BIM in the construction industry. In particular, the recent many studies on activation of BIM information sharing is underway and it is the future direction of BIM. Moreover, it should be clearly realized. In the BIM levels of domestic construction phase, Interference Review, calculating volume estimates in part based on the active research is underway. However, still interested in reviewing building codes have relatively little interest. As BIM enabled, The methods of reviewing building codes should be transformed into a automated system by using information of BIM. In overseas, they are already using diverse softwares for reviewing modeling. Thus, For an automatic review of building regulations research is needed. this study is research on the development Domestic building codes as an automatic review process by using BIM. In order to Automatic review of the current building regulations by using BIM, this study analyzes the characteristics of each piece of information.
A Study on Efficiency of Mixed Model (BTO+BTL) for Public-Private Partnership Projects
Kim, Do-Il ; Jin, Run-Zhi ; Hyun, Chang-Taek ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 53~63
DOI : 10.6106/KJCEM.2012.13.5.053
Korean Public-Private Partnership, mainly implemented using BTO (Build-Transfer-Operate) and BTL (Build-Transfer-Lease) methods, has contributed in increasing benefits of the people by providing the needed public services in a timely and efficient manner. It has also induced flexible national fiscal management. However, in addition to the repeal of the Minimum Revenue Guarantee (MRG) program in 2009, changes in business environment including recent financial crisis aggravated financial situation in pursing PPPs, resulting in significant contraction of BTO projects. Therefore, the new methods are to be suggested and applied to overcome this situation. This paper seeks to find ways to apply "Mixed Model," characterized as the compound of BTO and BTL, two different implementation methods of PPPs, as an enhanced burden-sharing mechanism.
An Analysis of Determinants of Turnover Intent of Architectural Design Firms
Seo, Hee-Chang ; Oh, Jung-Keun ; Kim, Jea-Jun ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 64~75
DOI : 10.6106/KJCEM.2012.13.5.064
Today organizations are making considerable efforts in order to maintain excellent talent, and in particular, they are focusing on understanding their intentions of changing jobs which are most highly correlated with job turnover. In the case of architectural design firms, its intensity of work is very high unlike industrial settings, and it not only takes much time to cultivate new men of talent and but also is characteristic that employees can change livery easily because of the flexible labor market. The turnover rated by National Statistical Office indicates that specialized, scientific and technical service industry including the architectural design firm has a relatively high turnover rate compared to the average of the turnover rate of the overall industries. However, studies on intentions of changing jobs until now were conducted focused on employees engaged in other industrial areas, and it is true that studies regarding intentions of changing jobs of practitioners of architectural design firms are very insufficient. In this context, the present study aimed to draw determinants affecting intentions of changing jobs of practitioners of architectural design firms, to objectively understand the practitioners' intentions of changing jobs through importance analysis by each factor based on this and to make a comparative analysis of differences between the large scale architectural design firms and the small and medium sized architectural design firms.
A Study on the Evaluation Framework to Analyze Construction Policy Performance
Jang, Hyoun-Seung ; Sohn, Tae-Hong ; Lee, Kyo-Sun ; Lee, Du-Heon ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 76~83
DOI : 10.6106/KJCEM.2012.13.5.076
The purposes of this study are both to identify suggestions regarding the evaluation framework of construction policy performance based on the analysis of the 4th Master Plan for Improvement of Construction Technology and to provide recommendations that can be used for developing the 5th Master Plan for Improvement of Construction Technology. In order to achieve this purpose, a questionnaire was distributed to construction industry-related professionals and makes them evaluate the performance of the 4th Master Plan for Improvement of Construction Technology by performance index appropriacy, measurement appropriacy, and target level. In addition, comprehensive literature review was implemented to extract important points, which are related to policy evaluation, that can be considered factors in developing the 5th Master Plan for Improvement of Construction Technology.
Environmental Impact Assessment of Buildings based on Life Cycle Assessment (LCA) Methodology
Hong, Tae-Hoon ; Ji, Chang-Yoon ; Jeong, Kwang-Bok ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 84~93
DOI : 10.6106/KJCEM.2012.13.5.084
Most of the studies on reduction of buildings' environmental burden in the construction industry have been focused on carbon dioxide emission, although there are various kinds of environmental issues such as global warming, acidification, and etc. which are considered by many researchers. Therefore, this study defined and suggested six impact categories and the principles to assess each impact for the assessment of comprehensive environmental impacts of buildings. The six impact categories are abiotic depletion, global warming, ozone layer depletion, acidification, eutrophication, and photochemical oxidation. A case study has been conducted through comparative analysis of two structural design alternatives to confirm the necessity of assessing the six impact categories. That is, the results of global warming potential and the six impacts proposed in this study were compared. By comparing the results of only global warming potential, the second design alternative using 24MPa concrete was chosen as a better alternative, while the first design alternative using 21MPa concrete was resulted as a better alternative when six impact categories were considered. The results mean that the assessment of various environmental impacts is an appropriate and reasonable approach and the comprehensive assessment offers more reliable results of environmental impacts in the building construction.
A Study on the Extracting the Core Input and Output Variables in Construction Company using DEA and PCA
Lee, Kyung-Joo ; Park, Jung-Lo ; Kim, Jae-Jun ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 94~102
DOI : 10.6106/KJCEM.2012.13.5.094
Recently, the global financial crisis and the increasing number of unsold houses in Korea are construction companies to assess their efficiency. The most important factor in analyzing the efficiency of a company is the input-output variable. However, systematic stud the core input-output variables, which have a great influence on the efficiency analysis. Thus, to the core input-output variables for efficiency analysis of construction companies, this study propose a model that includes all combinations of input-output variables and to find the core input-output variables using the Data Envelopment Analysis(DEA) model and Principal Component Analysis(PCA). Existing research and theories were studied variables and 21 models were established to measure efficiency. were obtained that the core input and output variable in 2006 the number of employees and sales. For 2008, the core input variable was capital stock and the core output variable was quarterly net profit. For 2010, the core input variable was fixed asset and the core output variable was sales. Through obtaining the variables that greatly affect the efficiency of construction companies, it is considered that individual construction companies will be able to prepare a priority strategy to enhance efficiency.
To Improve Production Process of the Modular Using the Conveyor System
Bae, Byung-Yoon ; Kim, Kyung-Rai ; Cha, Hee-Sung ; Shin, Dong-Woo ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 103~112
DOI : 10.6106/KJCEM.2012.13.5.103
Republic of Korea is recently becoming an advanced country with increasing standard of living. This is causing a lack of employment in the construction industry because of high labor costs and it is resulting rapid increase in foreign labors. Modular Method of Construction can be defined as 50%~90% of the entire process is completed in factory, and transferred to construction field to install. The main purpose of this process is to minimize the entire process that possibly can be done at construction field in order to maximize the quality. The current local usage of Modular Method of Construction started at Shin Ki Elementary School during 2003 and it is widely used for military facilities. It should be used more because it has strengths of spending short time period to complete and low production costs. It can make a change if Modular Method of Construction is applied. Toyota is currently producing vehicle with conveyor system and if Modular Method of Construction is applied, then it is possible to reduce the waste of labor, and automatic production time. Expansion of the modular Market can be expected by applying this method because it will improve producing costs, high quality, and enforced process. This research tried to solve the problem of factory's manufacturing production by applying local Modular Method of Construction to provide suggestions and analyze the profitability with applied conveyor system. It is depending on produced model, but this research's model will take 20 months including assessment of payback period.
Reengineering of TACT Process Management Analyzed on Task Information
Kim, Ok-Kyue ; Park, Jun-Mo ; Kim, Beop-Su ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 113~124
DOI : 10.6106/KJCEM.2012.13.5.113
TACT process reengineering is applied to the finish work of apartment buildings and extra tall buildings to conduct efficient process control in Korea. Non-systemized information on the performances, however, causes difficulties in building a database for such records and it takes long time to find the relevant information. In order to solve such problems, scientific and quantitative understanding on the construction information and data is required to perform TACT process reengineering satisfactorily and also proper management plan should be provided for the working level staff to understand the required information and data more easily. In this regard, this paper reorganizes the TACT process reengineering based on the general process control and classifies the items of required information to redesign. Redesigned process was verified by specialists making use of work-information matrix. As a result, paper contributed to increasing comprehension level of the working level people and when the persons in charge are transferred to other duty, it makes them understand all the working procedure faster, which enables the departments involved to carry out their cooperation and adjustment more efficiently.
A Study on the Competitiveness of Green Construction in Construction Firms
Lee, Eui-Dong ; Lee, Jae-Wook ; Kim, Han-Soo ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 125~134
DOI : 10.6106/KJCEM.2012.13.5.125
In the construction industry, "Green" is emerging as a keyword of new growth engine. Since green construction competitiveness is essential for contractors' survival and growth, it is important to understand what constitutes green construction competitiveness. The objective of the study is to identify elements of green construction competitiveness and to discuss relationships between their importance and current level based on the Gap analysis. A better understanding of the elements of green construction competitiveness assists contractors in formulating green strategies. It also provides insight into what motivates contractors in establishing related policies and regulations. The study identifies that in general there exists a gap between the importance and current level of green construction competitiveness. It also demonstrates that CEO' competence shows a less gap between the importance and current level but firms' competence is an area of weakness. Finally a substantial gap is observed in the field of green R&D strategies and sub-contracting partners.
A computation model for Resource-based Lifting loads of the lift-cars for super high-rise buildings
Han, Choong-Hee ; Lee, Jun-Bok ; Won, Seo-Kyung ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 135~143
DOI : 10.6106/KJCEM.2012.13.5.135
Constructing super-tall buildings is significantly different from constructing general ones in every technological and managerial aspects. Especially lift-car operations planning and management is one of core parts among various management techniques required during the course of the whole construction process of the super-tall buildings because vertical movements of physical resources enormously affect the efficiency of the construction processes. However, discrepancy between lifting plans and actual lifting operations causes serious efficiency problems. As an effort to solve the problem, this research suggests an improved method of estimating resource-based lifting load. The computing model developed as a result of this research facilitates more accurate computation of the total operation time and the maximum lifting capacity of the lift-cars. Further, this research can be developed as a decision support system for the total lift-car operations management.
Method of Transforming PDM Overlapping Relationships to BDM Overlapping Relationships in CPM Schedule
Kim, Seon-Gyoo ; Yoo, Jae-Woo ; Ko, Dae-Gyu ;
Korean Journal of Construction Engineering and Management, volume 13, issue 5, 2012, Pages 144~152
DOI : 10.6106/KJCEM.2012.13.5.144
The reason why most scheduling softwares currently using at construction projects adopt PDM (Precedence Diagramming Method) is that it can express an overlapping relationship between activities. However, the overlapping relationships in PDM are represented only by combinations of four overlapping types that connect the start and finish points of two activities, therefore, PDM cannot express efficiently the relationships between any middle points of two activities if they should be represented. This research proposes the method of transforming the four overlapping types of PDM to the overlapping relationships of BDM(Beeline Diagramming Method), new networking technique, that can connect the inter-relationships at any middle points of two activities as well as express multiple overlapping relationships. The proposed method will help not only to improve an efficiency of scheduling but also to upgrade the scheduling technique because BDM technique has a lot of unique advantages in scheduling.