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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
A Study on the Prediction of Initial Sales Rate on Apartment Housing Projects
Lee, Seongsoo ; Kim, Leeyoung ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 3~11
DOI : 10.6106/KJCEM.2015.16.4.003
Apartment developers consider the initial sales rate as an important indicator for their success of apartment development projects. They tried to achieve a secure level of initial sales rate. In spite of its importance, there is little research on the initial sales rate because of the difficulties in gathering proper data for analysis. This study, however, collects the data in initial sales rates in Su-won from various sources such as construction companies, marketing companies, sales companies and so on. By using this rare data, this study analyses the initial contract rate of apartment and estimates the initial contract rate by sales price. The result of this study shows that important of land area ratio, brand, and distance to park. It is expected that the proposed model will be used for apartment developers in sales planning phase.
An Input/Output analysis of the transportation industry for evaluating its economical contribution and ripple effect - Forecasting the I-O table in 2003~2009 -
Lim, Siyeong ; Kim, Seok ; Oh, Eun-ho ; Lee, Kyo Sun ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 12~20
DOI : 10.6106/KJCEM.2015.16.4.012
Construction industry has played a pivotal role in the national economy, but the crisis situation of a construction industry has been worse due to the lack of recognition of the contribution of a construction industry. In particular, the transport sector is responsible for a critical function in the movement of humans and material resources, and has a profound impact on national competitiveness and the peoples' welfare, which requires quantitative analysis. In this study, economic contribution and impact of the transportation sector are measured based on the input-output model. Road and railway facilities account for 1.03% and 0.165% of the total industry respectively, and consist of a final demand and total output. Although value-added inducing effect is small, production inducing effect and backward linkage effect has been high. The results in this study will be used as the basic information for validity of investment and policy decisions.
Improvement of Construction Cost Index against the Change of National Basic Statistic
Kang, Taikyung ; Baek, Seung-Ho ; Kim, Chang-Won ; Cho, Hunhee ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 21~29
DOI : 10.6106/KJCEM.2015.16.4.021
Construction cost index (CCI) has been published for last 10 years, it's contributed to update the historical cost data, analysis cost fluctuation and evaluate the market price for construction works with direct or indirect manner. CCI is a secondary or processed statistics using the basic statistics of input output table (IO table) and producer price index (PPI) from the Bank of Korea (BOK). So once the basic statistics change, it is required to modify the calculating model of CCI. Recently the BOK changed some fundamental principles and the base year (from 2005 to 2010), that can be used in IO table and PPI. This research analyzed the recent revision of basic statistics and their impacts on CCI, and improved the previous CCI model in response to it. Also the validity of new CCI was verified by analyzing the items and weights utilized in CCI and comparing the related index.
4D CAD Drawings based on Marker-based Augmented Reality
Kim, Hongjo ; Kim, Changyoon ; Jeong, Hoyoung ; Ha, Sooji ; Kim, Kinam ; Kim, Hyoungkwan ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 30~40
DOI : 10.6106/KJCEM.2015.16.4.030
Two-dimensional drawings are widely used as a communication tool in the construction industry, but they are still hard to be understood by engineers with less experience. A four dimensional CAD drawing is presented based on marker-based augmented reality, for visual assistance, detailed information, and prevention of misunderstanding among users. The developed drawing enables the users to easily understand its contents through the functions augmenting components, providing detailed construction information, and simulating construction process, using the marker in a 2D drawing. A questionnaire-based survey validates the capability of the developed drawing that it improves inexperienced engineers' understanding of the drawings.
LCCA and LCA to Evaluate Feasibility for Introducing High-Efficiency Motors into Air Ventilation Systems of Public Facilities
Quan, Junlong ; Choi, Sooho ; Kwon, Taehwan ; Choi, Hyemi ; Kim, Juhyung ; Kim, Jaejun ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 41~49
DOI : 10.6106/KJCEM.2015.16.4.041
The amount of energy consumed in air ventilation systems of public facilities accounts for 40% of their total energy consumption. To reduce their energy consumption, applying variable speed operation controlled by an inverter with a high-efficiency motor is suggested. Since these methods require higher initial investment costs compared to the existing systems, economic evaluation should be conducted from a long-term perspective. While LCCA(Life Cycle Cost Analysis) model is useful to estimate net savings of alternatives that differs with respect to initial costs and operating costs, the environmental burdens are not considered. On the contrary LCA(Life Cycle Assesment) model is suitable to assess environmental impacts associated with the stages of a product's life but it does not consider costs. In this study, the high-efficient motors are introduced into the air ventilation system of a subway station and a comprehensive analysis on the economic and environmental impacts of the proposed method is conducted by using LCCA and LCA model.
A Profit Prediction Model in the International Construction Market - focusing on Small and Medium Sized Construction Companies
Hwang, Geon Wook ; Jang, woosik ; Park, Chan-Young ; Han, Seung-Heon ; Kim, Jong Sung ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 50~59
DOI : 10.6106/KJCEM.2015.16.4.050
While the international construction industry for Korean companies have grown in market size exponentially in the recent years, the profit rate of small and medium sized construction companies (SMCCs) are incomparably lower than those of large construction companies. Furthermore, small and medium size companies, especially subcontractor, lacks the judgement of project involvement appropriateness, which leads to an unpredictable profit rate. Therefore, this research aims to create a profit rate prediction model for the international construction project focusing on SMCCs. First, the factors that influence the profit rate and the area of profit zone are defined by using a total of 8,637 projects since the year 1965. Seconds, an extensive literature review is conducted to derive 10 influencing factors. Multiple regression analysis and corresponding judgement technique are used to derive the weight of each factor. Third, cased based reasoning (CBR) methodology is applied to develop the model for profit rate analysis in the project participation review stage. Using 120 validation data set, the developed model showed 11% (14 data sets) of error rate for type 1 and type 2 error. In utilizing the result, project decision makers are able to make decision based on authentic results instead of intuitive based decisions. The model additionally give guidance to the Korean subcontractors when advancing into the international construction based on the model result that shows the profit distribution and checks in advance for the quality of the project to secure a sound profit in each project.
A Development of Framework for Selecting Labor Attendance Management System Considering Condition of Construction Site
Kim, Seong-Ah ; Chin, Sang-Yoon ; Jang, Moon-Seok ; Jung, Choong-Won ; Choi, Cheol-Ho ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 60~69
DOI : 10.6106/KJCEM.2015.16.4.060
Labor attendance management has traditionally been carried out by writing a table for checking an attendance of labor, which requires a lot of time and effort. As electronic devices with additions such as barcodes, Quick Response codes, and Radio Frequency Identification(RFID) have been developed, however, automated labor attendance management systems have appeared. Recently, various types of labor recognition devices converged with biometrics (fingerprint, vein, face recognition, etc.) have been released. However, although these devices can be used to check attendance automatically, there is insufficient guidance when it comes to selecting the appropriate labor attendance management system for construction sites. Therefore, this study proposed a decision framework to determine which labor attendance management system would be suitable for a construction site and to select the labor recognition device. This study investigated different labor recognition devices, focusing on how they worked, and tested the performance of devices and their usability for construction labor attendance management. The test results showed that RFID is most suitable when verifying the attendance of many laborers over a short period of time. The devices for hand vein and fingerprint recognition did not function when there was a foreign material such as cement or paint on the laborer's hand, except for a deformed finger. Reflecting these test results, this study suggested a framework for selecting a labor attendance system and recognition device; this is expected to contribute to the development of more efficient labor management systems.
Application of Real Option based Life Cycle Cost Analysis for Reflecting Operational Flexibility in Solar Heating Systems
Choi, Ju-Yeong ; Kim, Hyeong-Bin ; Son, Myung-Jin ; Hyun, Chang-Taek ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 70~79
DOI : 10.6106/KJCEM.2015.16.4.070
With the rise of the interest in a renewable system, the importance of the Life Cycle Cost Analysis(LCCA), an economic evaluation tool, has been increasing. However, there is an inevitable gap between a real cost and an estimation from LCCA because of the uncertainty of the external environment in real world. As the input variables in an analysis, such as a real discount rate and an energy cost, ares subject to change as time goes by, strategic decision on the current operating system is made depending on the real cost. Current economic evaluation approaches have treated only the fluctuation of input variables without consideration of the flexibility in operation, which has consequently led to the impairment on the reliability of LCCA. Therefore, new approach needs to be proposed to consider both the uncertainty of input variables and operational flexibility. To address this issue, the application of the Real Option to LCCA is presented in this study. Through a case analysis of LCCA of a solar heating system, the limits and current status of LCCA are identified. As a result, quantitative presentation of strategic decisions has been added in the new approach to implement the traditional approach.
A Study on the Change of Non-Working Days of Incheon Metropolitan through BCP Analysis
Ko, Kyujin ; Lee, Chansik ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 80~88
DOI : 10.6106/KJCEM.2015.16.4.080
In the case of those types of work that are performed outdoor construction work, many non-working days occur due to climatic elements such as low temperature, rainfall, and high wind velocity. In particular, damage incurred construction delays hardly decreases because weather forecasting has become difficult due to global warming. In the present study, time points of drastic changes in annual average temperatures, annual average maximum temperatures, and annual average minimum temperatures were identified through BCP analysis and increasing/decreasing trends of non-working days in summer and winter were compared and analyzed on the basis of the change points. According to the results of the study, annual average temperatures drastically changed in 1988 and 1998. After the two time points, non-working days in summer and winter clearly showed increasing trends and decreasing trends respectively.
An Analysis of the Duration of the Construction Document Phase of Large Public Building Projects Delivered by the Total Solution Service from 2009 to 2014
Jung, Wooyoung ; Lee, Taewon ; Rhee, Pung-wook ; Lee, Ghang ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 89~97
DOI : 10.6106/KJCEM.2015.16.4.089
This paper analyzes the duration of the construction document (CD) phase of 42 large public building projects delivered by the total solution service of Public Procurement Services in Korea from 2009 to 2014. The quality of construction documents significantly affects the quality of construction and facility management. Thus, securing appropriate time for the CD phase during project planning is important for the quality of a project. Currently, the duration of the CD phase is planned based on the construction costs of a project following a notice of the Ministry of Land, Infrastructure and Transport. However, our analysis results showed that the correlation between the actual duration of the CD phase and construction costs is very weak. The actual CD phase takes 1.33-1.79 times longer than the planned duration. The practitioners who were interviewed, were already aware that the correlation between the duration of the CD phase and the construction costs is weak. They identified the complexity of the project, the extent of the design changes, project type, client characteristics, and others as more influential factors on the CD phase than the construction costs. To improve the quality of CDs, a new guideline for determining an adequate CD phase duration should be studied and developed.
Calculation Model for Function & Cost Score based on Normalization Method in Design VE
Lee, Jongsik ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 98~106
DOI : 10.6106/KJCEM.2015.16.4.098
VE aims at reduction in a budget, improvement of function, structural safety and quality security for public construction projects. However, there is possibility for the structural safety and quality security review to be insufficient because related regulations are mostly composed of analysis on economic efficiency of design. In addition, due to the misconception about VE as a cost saving methodology, an alternative is being presented which still focuses mainly on cost saving, but with no objective evaluation of function related to cost. In order to improve this, the government adopted the reduction of life cycle cost and proposal of value improvement, and let people specify the cost and function of the original plan versus the alternative plan, and the value changes between them. However, it is written mainly into practical convenience rather than theoretical basis since a specific way is not suggested. The current method sets a different starting point by applying the attributional difference of function and cost. Furthermore, an evaluation standard for correlating is an important element in rational decision making for assessing and choosing an alternative. This paper analyzes the process and method of function & cost scoring when performing VE and suggests a mathematical normalization model in order to support rational decision making when selecting an optimum plan.
An analysis on the Investment Determinants for Urban Business Hotel Development
Ha, Jung-huhn ; Jeong, Moonoh ; Lee, Sangyoub ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 107~117
DOI : 10.6106/KJCEM.2015.16.4.107
As the demand for urban business hotel has increased in the recent years due to the sharp rise in overseas tourists, the potential of business hotel development has gained in financial attention for the real estate investment. However, its concept and business domain has not been defined, and none of investment guidance for the development has not been clarified. Accordingly, this report intends to define the concept of urban business hotel in perspective of real estate investment through prior case studies and literature review, and provide the structure of determinants which control its investment decisions. Furthermore, this study develops the weight of determinants depending on the type of investment, and evaluate the two actual projects in urban area of Seoul, differed from investment type: direct and indirect, based on AHP and Fuzzy methodologies. Research finding indicate that the financial factors affecting the sales and tour business condition factors are critical determinants regardless of investment type. And it is notable that the direct investment perspective pays more attention on the finance and investment associated determinants while the indirect one more focuses on the regional and environmental ones. From the analysis of case evaluation, it is also noteworthy that the direct investors turn out to be more conservative than indirect investors due to the risk of equity capital investment.
A Study of the Establishment of BIM Design Environment based on Virtual Desktop Infrastructure(VDI) of Cloud Computing Technology
Shin, Joonghwan ; Lee, Kyuhyup ; Kwon, Soonwook ; Choi, Gyuseong ; Ko, Hyunglyu ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 118~128
DOI : 10.6106/KJCEM.2015.16.4.118
Recently BIM technology has been expanded for using in construction project. Due to the high-cost of BIM infrastructure development, lack of regulations, lack of process and so forth, usage of BIM has been delayed than initial expectations. In design phase, especially, collaboration based on BIM system has been a key factor for successful next generation building project. Through the analysis of current research trends about IT technologies, virtualization and BIM service, data exchange such as drawings, 3D model, object data, properties using cloud computing and virtual server system is defined as a most successful solution. The purpose of this study is to enable the cloud computing BIM server to provide several main functions such as editing models, 3D model viewing and checking, mark-up and snapshot in high-performance quality by proper design of VDI system. Concurrent client connection performance is a main technical index of VDI. Through testing of test-bed server client, developed VDI system's multi-connect control is evaluated. Performance-test result of BIM server VDI effect to development direction of cloud computing BIM service for commercialization.
A Study on the Technology Level Assessment of Road Construction in Korea
Kim, Kyong-Hoon ; Lee, Du-Heon ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 129~138
DOI : 10.6106/KJCEM.2015.16.4.129
In this study, the road construction field of high impact in the construction industry were selected, and the analysis of the detailed technology level was carried out. and we derived the main fields for future overseas. As results, the technology level of road facilities in korea was high about road operations and management sector, while it was relatively row about road pavements. And this study, we analyzed the economic, social and technological priority, and derived main fields to have the high investment efficiency. A derived items are found to be "maintenance-free Modular Road Pavements" and "Cities temperature reduction-type road".
Application of Activity-Based Costing(ABC) for Modular Building Construction Indirect Costs Calculation at the Manufacturing Stage
Lee, JeongHoon ; Park, Moonseo ; Lee, Hyun-Soo ; Lee, Kwang-Pyo ; Hyun, Hosang ;
Korean Journal of Construction Engineering and Management, volume 16, issue 4, 2015, Pages 139~145
DOI : 10.6106/KJCEM.2015.16.4.139
Modular construction is combined with manufacturing production process and conventional construction industry technique. Considering characteristic of modular construction production process, manufacturing facilities require indirect costs for utilities, equipment, and overall maintenance, which can affect modular units pricing. However, current modular construction cost classification is inadvertent to reflect the manufacturing overhead costs, because it is generally added as a percentage to sum of labor, material and equipment as it called in single cost pool used. This process is easy to estimate the total construction cost at the project starting points, but it brings on misunderstanding of project profit estimations by "cross subsidization phenomenon". To prevent this situation, in this research aims to provide modular construction overhead cost handling process at the detailed indirect cost calculation for manufacturing stage using Activity-Based Costing as one of the powerful method for overhead costs estimation and allocation. Using this research results, modular construction cost estimators have more detailed cost information of modular units and prevent to misallocate indirect costs. Also, it can be utilized to aid the understanding of the company's profit structure.