Hyoun-Seung Jang

Genetic algorithm for construction space management

Poor usage of space at construction sites is one of the leading causes of decreased productivity in the construction industry; however, it is manageable, and some instances preventable. This study focuses on how to efficiently manage space for constructi on materials on high-rise buildings in congested urban areas where space for materials around the building footprint is not available. The construction materials layout plan provides a logical order and priority for space planning decisions with reasonable costs. Genetic Algorithm (GA) modeling assumptions are made in order to properly allocate space for materials that will result in lower computational costs and increased in productivity.

Client values within post-disaster reconstruction contracting services

Purpose The purpose of this paper is to explore and prioritize the key client values within contracting services for reconstructing the built environment in post-disaster situations. Design/methodology/approach A literature review, semi-structured interviews and questionnaire survey were included in this study. A comparative analysis was used to obtain different perspectives between public and private sectors. Findings A total of 39 client values were identified in this study. Clients for disaster reconstruction services put more emphasis on values such as timeliness, availability of resources, competency, building a trust-based relationship, financial stability, and communication techniques than contract price. Public and private clients have a different perspective regarding the importance of the identified values, while these are not statistically significant for the most important values. Research limitations/implications The construction literature is focussed on business-as-usual rather than post-disaster reconstruction. To ensure that reconstruction programmes after a disaster are successfully implemented, it is necessary to identify and prioritize the client values within contracting services. Focussing the attention of the service providers on these values is believed to have the greatest impact on the programmes’ success. Practical implications Understanding the client values identified by this study can aid contractors to better prepare for reconstruction programmes and provide improved services to clients. Originality/value A number of important client values within contracting services that appear to have a bearing on the success of disaster reconstruction programmes were identified in this study.

Analysis of Concentrate Competency for Cambodian Building Construction Projects

Recently, with achieved US

Analysis of Modeling Errors for BIM-based Facility Management Systems

500 Billion international cumulative construction order, the Korean government presented overseas construction industry visions for international orders of US

Analysis of the major subcontract competence factors of overseas plant construction

100 B and entering the top five countries in global construction market. Also, Korean companies are developing strategies for expansion of international markets especially focused on company competitiveness as a target market. Therefore, this study aims to analysis of competitiveness for the Cambodian building construction market, which presents abundant development potential. The results of IPA result were as follows; construction order information and supply chain management are needed for public tender projects and F/S, global project financing, and supplier relationship management are needed for construction investment projects. However, this work is still considered to provide the basic data that can help Korean construction companies who plan to enter the Cambodian building construction market strengthen their medium and long-term capabilities.

Establishment of Cooperation Evaluation System between Domestic Large Enterprises and Small/Medium-Sized Enterprises for Invigorating Joint Overseas Expansion

Facility Management is the longest in the building of life cycle. Because it occupies more than 80% of cost, the phase of Facility Management has to be managed and has to be perceived as important as design and construction phase. The method to manage building more efficiently is the introduction of Facility Management System used by CAD and database. But information Requirement is now input by hand in the most Facility Management System. This study aims to analyze the example of applying BIM in the Korea or abroad and the errors of this were deducted by many phase. Lastly, the possible solution is suggested in order to be used in the Facility Management System. This study`s benchmarking is COBIE which is developed by the COE(Corps of Engineers) and now popular in the world. The suggestion in this study is the method that I have already mentioned is helpful for a designer to do modeling when a designer uses BIM S/W(software). To be more specific, the method plays a side role in helping data input considering the phase of Facility Management.

A Study on Strategies of Small and Midsize Construction Companies for Joint Overseas Expansion

In 2012, Korean overseas construction market has achieved 64.9 billion dollars of contract order and its amount has increased since the mid 2000’s. However, importance of qualitative growth based on profitability as well as quantitative growth is also emphasized. This study analyzed overseas plant project’s subcontract process management which is closely related to cost management as one of the qualitative growth methods. In order to select major subcontract processes, extensive literature review and focus group interview(FGI) were implemented and then professionals with years of experience in the overseas plant projects were participated in the questionnaire survey. The collected data were analyzed by Benefit-Structure Analysis(BSA) model. The findings of this study include: (1) the seven and six subcontract processes are positioned in the area of importance control factor and in the area of maintenance/control factor, respectively; (2) administration capability attainment is needed for the six subcontract processes in the area of importance control factor and sustainable management system is required for the processes in the maintenance/control factor area. The further research will identify key subcontract processes to be managed for overseas plant projects by Korean EPC contractors based on the findings of this research.

Construction EC Strategy Model and Improving Fields for Global EC Transition

Joint overseas expansion could contribute domestic large enterprises and small/medium-sized enterprises to expand overseas construction market by complementing each others vulnerabilities and weaknesses. To invigorate it, not only does mutual effort between both parties matter, but also providing motivation such as institutional incentives and compensations are important for inducing large enterprises to voluntarily expand overseas construction with small/medium-sized enterprises. However, institutional systems exist only to promote win-win growth limited to domestic construction except for overseas construction. Therefore, the purpose of this study is to establish cooperation evaluation system between domestic large enterprises and small/medium-sized enterprises for invigorating joint overseas expansion by evaluating large enterprises cooperation efforts, and offering incentives to some enterprises gaining a good grade. The developed system could contribute to effectively promote win-win growth by providing institutional guidelines. In other words, The government could induce large enterprises cooperation efforts to some parts which small/medium-sized enterprises need, and large enterprises could selectively and intensively support insufficient cooperation part based on the evaluation result.

Implementation Information Technology in the Nuclear Power Plant (NPP) Construction

Overseas construction market continues to grow while that of Korea suffers sluggish growth. Under the circumstances, Korean construction companies are expanding its presence in the overseas market to overcome the crisis. However, only a handful of construction conglomerates have entered into the overseas market so far. Different working and business environment, language, culture and system also pose great risks for small and medium construction firms that are relatively incompetent to enter the market abroad. Therefore, the paper suggested ways to enhance their competence and address problems they face. To this end, with focus on the small and medium construction firms that were deemed to have less overseas work experience and less competency among the local ones, it identified their issues arising from overseas projects and incompetent areas and the cause and effect of such incompetency through DEMATEL technique.

Optimization of floor-level construction material layout using Genetic Algorithms

Since the early 1990s, Korean construction companies have strived to evolve into global Engineering Construction (EC) companies. However, such efforts have been unsuccessful, partly due to a lack of clear objectives and a misunderstanding of the direction that needed to be taken for such a change. A better understanding is required with respect to the need to transform into an EC company in the context of the rapidly changing global construction environment. This research investigates major EC companies from around the world, and assesses the status of domestic companies’ efforts for EC transition. The results of these investigations revealed that domestic firms need to better prioritize their strengths for different markets, i.e., decide whether to implement directly, outsource or limit to process management. In addition, the investigations showed that the global market is shifting from monolithic projects to more complex projects. Such projects require firms with the ability to develop and implement high front-end investment strategies, planning capabilities, and pre-design management skills. Accordingly, we recommend that firms differentiate themselves by developing such a skill set required for specific products.