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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 15, Issue 6 - Nov 2014
Volume 15, Issue 5 - Sep 2014
Volume 15, Issue 4 - Jul 2014
Volume 15, Issue 3 - May 2014
Volume 15, Issue 2 - Mar 2014
Volume 15, Issue 1 - Jan 2014
Selecting the target year
A Schematic Estimation Model for Structure Costs of High-rise Buildings based on Vertical and Horizontal Elements
Nam, Dong-Hee ; Park, Hyung-Jin ; Koo, Kyo-Jin ;
Korean Journal of Construction Engineering and Management, volume 15, issue 1, 2014, Pages 3~10
DOI : 10.6106/KJCEM.2014.15.1.003
High-rise buildings need thorough cost management because of large size and high risk. Cost management makes a budget by establishing and analyzing detail element at planning phase, needs cost control as each design phase, then reflected to next design. This research develops a schematic estimation model based on vertical and horizontal elements at design phase for structure cost of high-rise buildings to reduce error range and use data as design management. Usability of the model is confirmed by case study. The estimation model is expected to contribute to making the cost model more effective and satisfactory to concerned in construction or budget department and manage keeping track of the cost.
Study on the Application of Multi-skilled labors to Factory Production Process for Securing Economic Feasibility of Modular Unit
Kim, Hakcheol ; Hwang, Youngkyu ; Kim, Kyungrai ;
Korean Journal of Construction Engineering and Management, volume 15, issue 1, 2014, Pages 11~19
DOI : 10.6106/KJCEM.2014.15.1.011
The Construction industry is a labor-intensive industry that its labor cost takes up about 30~40% out of the whole construction cost. However, due to a stereotype that on-site work is a 3D job there is a shortage of the labor forces. Modular construction method is to produce modular units in the plant so that workers could work stably. Also, after delivering the module from plant to the site, there will be only installment to be required that shortens construction duration. Even though the modular market is currently expanding based on military facilities in Korea, its best strengths are not demonstrated well which are shortened construction period and low cost. It also causes labor problem of production due to minimum utilization of the modular construction method. Multi-skilled labor means a technician that is able to perform more than two kinds of work with more than two techniques. Multi-skilled labor can proceed smoothly by figuring out the connectivity between the precedent and following operations. Therefore, this research is to apply the concept of Multi-skilled labors, suggest solutions and allocate manpowers efficiently. As a result, it helps to decrease idle manpowers during the operation and the total labor forces can be saved. Low cost is the original strength of the modular which can stand out so the modular market is expected to expand.
Application of Serious Games for Effective Construction Safety Training
Son, JeongWook ; Shin, Seung-Woo ; Yi, June-Seong ;
Korean Journal of Construction Engineering and Management, volume 15, issue 1, 2014, Pages 20~27
DOI : 10.6106/KJCEM.2014.15.1.020
Construction safety training has mostly relied on one-way transference of instructors' knowledge to trainees through traditional media such as textbooks and lecture slides. However, safety knowledge could be more effectively acquired in experiential situations. The authors proposed a serious game to provide a comprehensive safety training environment. Trainees who assume the roles of safety inspectors in the game explore a virtual construction site to identify potential hazards and learn from the contents of feedback created by the game as a result of trainees' input. The paper reports details of the game design and development process. The test results indicated that trainees were motivated to refresh their safety knowledge, increased their learning interests, and enjoyed the learning process. In addition, trainees showed positive attitudes towards using the game scoring as a way of evaluating their safety knowledge. The test results encouraged the continuous development of the game.
A Study on the Improvement of the Design VE Process using VE Idea-DataBank System
Park, Heetaek ; Park, Chansik ; Jung, Wooseob ;
Korean Journal of Construction Engineering and Management, volume 15, issue 1, 2014, Pages 28~38
DOI : 10.6106/KJCEM.2014.15.1.028
Construction value engineering(VE) is often performed in the form of a short term review of designs, rather than during a regular workshop with a standardized work plan, and its application method is limited. Thus, tasks are performed by applying the method in reverse depending on the VE results, and function analysis, a key VE method, is omitted or only applied for the sake of formality. In addition, it is hard to expect great results from VE because of insufficient time and budget allowed to perform VE and a lack of understanding of VE procedures and methods. In particular, the methods used to store and reuse the tremendous amount of ideas and information created during the process of VE implementation is not systematic. Even the Korea Expressway Corporation, which has produced relatively systematic VE performance compared to other institutions, has had the above-mentioned problems. Therefore, this study aims to improve existing VE processes and suggest a method to efficiently store and retrieve VE information by analyzing the limitations of construction VE practice and the characteristics of VE for highway facilities as part of improving design VE performance.
Feasibility Study on Remodeling Project By Using Real Option Model : Focusing on Apartment House Remodeling
Yeon, JungHoon ; Lee, Hyun-Soo ; Park, Moonseo ; Kim, Sooyoung ; Ahn, Joseph ;
Korean Journal of Construction Engineering and Management, volume 15, issue 1, 2014, Pages 39~50
DOI : 10.6106/KJCEM.2014.15.1.039
After the global financial crisis, domestic construction industry has gone through a rapid recession. This resulted in gradual market shift towards architectural remodeling. Architectural remodeling not only improves residential environment but it has many advantages such as increase of each unit's exclusive area, free space within the horizontal or extension of an annex building, and increase number of household through splitting the household of bigger pyeong, etc. However, in case of the Korean market for apartment remodeling, due to various regulations and problem with business promotion procedures, majority of business is slow despite the figure that remodeling volume is not that small. Also, feasibility study which decides to push ahead public house remodeling business will have a flaw using net present value's law; it has a flaw of not considering properties of each phase of remodeling business and future's uncertainty. Hence, this research will improve the problem of traditional value assessment method of net present value's law. It will also consider one of the real options such as binomial model in order to supplement NPV which is used in current feasibility study. This research was based on real successful cases of public house remodeling and it was possible for feasibility study which was more realistic and valid. This research provided foundation for development of Korean public house remodeling market. There is high anticipation of increasing the validity by improving the problems of current feasibility study and economic efficiency assessment.
Fuzzy-based Decision Support Model for Determining Preventive Maintenance Works Order
Ko, Taewoo ; Park, Moonseo ; Lee, Hyun-Soo ; Kim, Hyunsoo ; Kim, Sooyoung ;
Korean Journal of Construction Engineering and Management, volume 15, issue 1, 2014, Pages 51~61
DOI : 10.6106/KJCEM.2014.15.1.051
Preventive maintenance of buildings has increased the importance of interest in that it is able to maintain the performance building has and to prevent a problem occurred in future. For improved preventive maintenance work, it should be performed to select works order clearly and preceded the accurate measurement for the state of works order. when measuring the conditions, measurement of the state of work order considering the various criteria is more effective than to measure by only criterion. But, there are something hard to evaluate exactly between the criteria because of decision-maker's subjective judgments. To solve these problems, this research proposes decision making support model to determine preventive maintenance works order using Fuzzy-sets. By using Fuzzy-sets when measuring state of work objects, it can be reduced vagueness of judgments by decision-makers. This model can be used as a tool for objective evaluation of preventive maintenance work orders and offer the guideline to perform decision-making.
Perception and Evaluation of Construction Management Firms toward Government Policies for Construction Management
Jo, You Gyeong ; Kim, Han Soo ;
Korean Journal of Construction Engineering and Management, volume 15, issue 1, 2014, Pages 62~69
DOI : 10.6106/KJCEM.2014.15.1.062
Since a government policy greatly affects markets and firms, an evaluation on government's policies is recognized as a critical issue. In Korea, two major policy plans on CM(Construction Management) include the Construction Industry Promotion Plan and the Construction Technology Promotion Plan from which Government's CM policies can be understood. The objective of the study is to analyze and discuss CM firm's perception and evaluation toward the Government's CM policies of the two plans based on the Gap analysis. The paper identified that the CM firms perceive that the Government's CM policies properly deal with key issues of the industry. However, they evaluate that the execution of the policies has been overall under-performed. As a way forward, the Government needs to improve on the execution plan and performance measurement rather than to develop new policy agenda.
Understanding Collaborative Working Processes within Construction Project Teams Using Agent-Based Modeling and Simulation
Son, JeongWook ; Shin, Seung-Woo ; Yi, June-Seong ;
Korean Journal of Construction Engineering and Management, volume 15, issue 1, 2014, Pages 70~77
DOI : 10.6106/KJCEM.2014.15.1.070
Collaborative processes among team members including communication, coordination, and information-handling processes either during pre-construction or project execution are required in order to accomplish the objectives of construction projects. However, current construction management practice does not explicitly take the effect of organizational aspects on project performance into account. This paper introduces a method to understand collaborative processes in an explicit and systematic fashion. An agent-based simulation of collaborative working processes within construction project teams was designed from game theory perspective and implemented. The simulation produced both individual behavior and network dynamics. Individuals represented as agents made efforts to improve performance by communication and coordinating with other members, and overall team network was emerged as a result of interactions among members. Interestingly, it was found that the tendency of forming cohesive subgroups increased when sustaining relations with between-group partners incurs higher cost. The primary contribution of this paper is that it presented an explicit approach to examining collaborative working processes in construction project teams and it extended existing computational organization and network studies by integrating individual behavior models and network models.
Marketing Strategy and Influential Factors based on the Attributes of Unit Modular System
Kim, Domin ; Lee, Jeongseok ; Kim, Juhyung ; Kim, Jaejun ;
Korean Journal of Construction Engineering and Management, volume 15, issue 1, 2014, Pages 78~86
DOI : 10.6106/KJCEM.2014.15.1.078
Modular system is a construction method which installs factory-manufactured units on site. It enables to reduce the duration and improve the quality of the construction. Nevertheless, the unit modular system is restrictively applied to domestic market such as barracks, education facilities, low-rise housing. To motivate the application of unit modular system, this study figures out important attributes of the unit modular system in a domestic construction market. Finally this study suggest marketing strategies and influential factors by Importance-Performance Analysis(IPA) based on those attributes focusing on the apartment housing. As a result, Unit modular System in the domestic market has strength on constructability, but it show weakness on usability and economic aspects which are more important in apartment housing market. Thus an improved technology in usability and economic aspects are required to activate the market.
Comparison Analysis of Environmental Performance between Reconstruction and Remodeling Alternatives for Aged - Focused on CO
Emissions Analysis -
Kim, Chibaek ; Shin, Dongwoo ; Han, Juyeon ; Hwang, Youngkyu ;
Korean Journal of Construction Engineering and Management, volume 15, issue 1, 2014, Pages 87~100
DOI : 10.6106/KJCEM.2014.15.1.087
Environmental problems and the shortage of natural resources are currently gathering more attention in Korea and international countries. With these problems, it is reported that most current domestic buildings are emitting approximately 138 million tons of greenhouse gas. According to a recent report from the investigation of Korean housing population, the total number of households is approximately 12.9 millions, and the apartments that were built more than 15 years ago amounted to 3.1 millions. This shows that the rates of old apartment housings are increasing. Therefore, it is necessary to consider the deteriorated facilities and environmental improvement. Also, the construction industry is benefited by improving these housings which may need either remodeling or reconstruction. Environmental friendly buildings are a rising consideration for remodeling and reconstruction projects; it helps to determine many business matters in construction. The main purpose of this research is to improve environmental condition in apartments with comparison analysis between remodeling and reconstruction alternatives. This research is focused on characteristics of remodeling and reconstruction and it sets up the same condition with each level in order to evaluate the value of environmental friendliness and analyze its definition. The result of this research provides a unique emitting rate at a novel framework and this will cause the reduction of
. It is analyzed that the remodeling construction can reduce the great amount of
. Therefore, it will be a good decision guideline in selecting the most eco-friendly alternative to improve environment for building construction. Although reconstruction is a popular alternative nowadays in Korea, this research can provide a reason why decision makers should put more emphasis on remodeling as an environment-friendly alternative.
An Optimization Algorithm of Gypsum Board Loss for Wall Finishing in Modular Construction System
Lee, Dong-Min ; Chin, Sangyoon ;
Korean Journal of Construction Engineering and Management, volume 15, issue 1, 2014, Pages 101~110
DOI : 10.6106/KJCEM.2014.15.1.101
The ministry of Land, Infrastructure and Transport announced that they launched the pilot project to offer Happy House built with modular construction as part of the major projects of incumbent government in 2013. The market size of modular construction is getting increasingly enlarged together with strong will of government. The major challenges that current modular construction encounters can be summed up as lack of standardization of material on the stage of design and fabrication. The portion of material costs in modular construction marks 16 to 17% higher than the existing other construction method, and account for 60 % of total construction cost, which is why material management is the most important factor. However, the imperfect standardization and specification on design causes high loss of materials on fabrication, which makes the construction wastes and total construction cost increasing in accordance with the increase of material costs. This study has been conducted to verify major modules by developing optimization algorithm on gypsum board material among wall finishing materials. It is expected that this paper contributes not only to eco-friendly construction by minimizing the waste factors of materials through these efforts, but also to removing high cost issues which had been recognized as a setback of current modular construction.
Using the Binomial Option Pricing Model for Strategic Sales of CER's to Improve the Economic Feasibility of CDM projects
Koo, Bonsang ; Park, Jong-Ho ; Kim, Cheong-Woon ;
Korean Journal of Construction Engineering and Management, volume 15, issue 1, 2014, Pages 111~121
DOI : 10.6106/KJCEM.2014.15.1.111
The Clean Development Mechanism (CDM) allows New & Renewable Energy projects to make additional income by selling CER's, which represent the amount of Green House Gases(GHG) that is reduced in the project. However, forward contracts used to hedge fluctuating market prices does not allow projects to sell CER's at a premium. As an alternate approach to maximize CER revenue, CER's are modeled as a 'real option', in which CER's are sold only above the desired sales price. Using the Binomial Option Pricing model, the resultant lattices are used to determine whether to sell, defer or abandon the option at individual nodes. Overlaying Pascal's Triangle on the lattices also enabled the calculation of the annual probabilities for deferring CER sales without incurring downside losses. Application to an actual Landfill Gas project showed increased overall NPV, and that CER sales could be deferred at a maximum of 2 years. The proposed framework allows transparency in the analysis and provides valuable and strategical information when making investment decisions related to CER sales of CDM projects.
Framework and Core Competency of Integrated Design Management (IDM)
Kim, Yesol ; Jung, Youngsoo ;
Korean Journal of Construction Engineering and Management, volume 15, issue 1, 2014, Pages 122~133
DOI : 10.6106/KJCEM.2014.15.1.122
Recent diversification of project delivery systems coupled with increasing mega-projects requires highly advanced construction management techniques. Among those techniques, procurement and design management are recognized as being the first priority for overseas construction projects. Nevertheless, previous research in design management has been limited to the quality management of the design documents at design stage. Therefore, it is necessary to explore the design management from a comprehensive perspective throughout the project life cycle. In this context, the purpose of this paper is to propose a conceptual framework for integrated design management (IDM). Several different concepts in relation to design management were investigated first in order to identify the major variables of the IDM framework. A comprehensive comparison of construction management methodologies was also analyzed in order to identify key factors of IDM. Finally, an IDM framework was proposed by combining those factors and relevant issues. Based on the proposed framework, a survey was conducted in order to validate the framework as well as to identity important areas for improving competitive capability of Korean construction companies.