• Title/Summary/Keyword: Turnkey project in construction

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CONSTRUCTION SCHEDULE DELAY RISK ASSESSMENT BY USING COMBINED AHP-RII METHODOLOGY FOR AN INTERNATIONAL NPP PROJECT

  • HOSSEN, MUHAMMED MUFAZZAL;KANG, SUNKOO;KIM, JONGHYUN
    • Nuclear Engineering and Technology
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    • v.47 no.3
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    • pp.362-379
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    • 2015
  • In this study, Nuclear Power Plant (NPP) construction schedule delay risk assessment methodology is developed and the construction delay risk is assessed for turnkey international NPP projects. Three levels of delay factors were selected through literature review and discussions with nuclear industry experts. A questionnaire survey was conducted on the basis of an analytic hierarchy process (AHP) and Relative Importance Index (RII) methods and the schedule delay risk is assessed qualitatively and quantitatively by severity and frequency of occurrence of delay factors. This study assigns four main delay factors to the first level: main contractor, utility, regulatory authority, and financial and country factor. The second and the third levels are designed with 12 sub-factors and 32 sub-sub-factors, respectively. This study finds the top five most important sub-sub-factors, which are as follows: policy changes, political instability and public intervention; uncompromising regulatory criteria and licensing documents conflicting with existing regulations; robust design document review procedures; redesign due to errors in design and design changes; and worldwide shortage of qualified and experienced nuclear specific equipment manufacturers. The proposed combined AHP-RII methodology is capable of assessing delay risk effectively and efficiently. Decision makers can apply risk informed decision making to avoid unexpected construction delays of NPPs.

Analysis of the Influence of Design Score and Price Score for Design Build Bidding (설계시공일괄입찰에서 설계점수와 가격점수의 영향력 분석)

  • Lee, Jinhak;Woo, Sungkwon;Lee, Siwook
    • Korean Journal of Construction Engineering and Management
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    • v.24 no.5
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    • pp.44-51
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    • 2023
  • Selecting appropriate bidding system in construction projects considering the characteristic of project can be a make-or-break element, so the understanding for bidding system of public construction projects is ever more important from the perspective of both the owner and the contractor. The design-build bidding is commonly referred to as turnkey in Korea, and is a bidding method that is often applied to large public construction projects because it allows new technologies to be applied to the design and facilitates risk management for the owner. In this bidding method, there are only two factors (design score and price score) that affect the selection of the winning bidder, so it is important to understand the influence of each factor, but there is little research on the subject. This study aims to provide a basis for establishing bidding strategies for understanding the influence between design score and price score by analyzing various design-build bidding data of public construction projects. The results of the study show that design score is the factor that has more influence on the ranking of bidders in all three weighted evaluation methods: design-emphasized, price-emphasized, and equalized evaluation. In addition, we found that the correlation between design and price scores was not significant due to the unique bid evaluation structure in Korea.

A Study on the Problem and Improvement of Screening System of Low Price Subcontracting by Analyzing a Standard of Judgement Criteria (원도급자 측면에서의 저가하도급 판정기준의 문제점과 개선방안)

  • Kim, Soon-Young;Han, Choong-Hee;Baek, Tae-Ryong;Kim, Kyoon-Tai;Lee, Jun-Bok
    • Korean Journal of Construction Engineering and Management
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    • v.10 no.6
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    • pp.107-116
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    • 2009
  • As the Fundamentals of Construction Business Act was revised in December 2004 and its implementing ordinances and enforcement regulations were adjusted in June 2005, the screening system of low price subcontracting has been an obligation to the public owners, having brought about arguments for and against since it enacted in 1983. The statutes for low price subcontracting have been reinforced from this year; for example, it underlines to submit to a project and builds an information network of subcontracting works. The system's original intention was that prevents shoddy and fraudulent constructions caused by low price subcontracting and precludes disturbances of fair trade by screening that whether it satisfies the conditions or not in advance. But, the criterion for the existing low price subcontracting has several issues having held up a true mirror to the real situation. It is arguable to discharge an important task with the primary purpose. This dissertation have researched the problem with a deposit of subcontract and the low price subcontracting basic rate are being used by the criteria for deciding whether it is a low price subcontracting or not, so showing the plan of reformation based on the findings, it wishes to contribute toward making the most of the system's essential intent.