• Title, Summary, Keyword: Alternative-design contract

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Improvement of Procedures on Design Deliberation System for Turnkey and Alternative-Design Contracts (턴키.대안입찰 설계심의 및 평가제도의 개선방안)

  • Park, Hong-Tae;Lee, Yang-Kyoo
    • Journal of the Korean Society for Railway
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    • v.14 no.1
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    • pp.31-38
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    • 2011
  • Turnkey and alternative-design contracts was introduced operation in the country from january 2004 to February 2010. this was introduced operation. The selecting method of contractor for turnkey projects has being operated by an open forum type that consists of technical committee and appraisal committee in an integrated design approach deliberations. But to improve the operation of the problems, the government is operating design review committee consisting of the central, local and special design advisory committee in march 2010. But this system has also been suggested as still problems, too many contracts by large companies, increasing of design cost and excessive competition. This study is intended to contribute that turnkey and alternative-design contracts can be well operated in domestic construction markets. In this paper suggests some improvement methods and operational problems caused from application of an open forum type for selecting contractor of turnkey project.

Improvement of Turn-key Contract System through the Analysis of Present Ordering Condition in Civil Engineering Projects (토목공사 수주현황 분석을 통한 턴키${\cdot}$대안입찰제도의 문제점 및 개선방안 연구)

  • Lee Yang-Kyoo;Kang Leen-Seok;Park Jong-Hyuk;Jeon Seong-Chul
    • Journal of the Korean Society for Railway
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    • v.8 no.5
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    • pp.460-469
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    • 2005
  • Turnkey contract system is an effective ordering system for the ordering organizations that technical engineers are insufficient for their construction projects. It is possible to reduce project duration and to improve project quality in an integrated contract system between design and construction. However, owners can have a difficulty caused from unitary responsibility system. This study analyzes present situation and problems of turnkey contract system including railway projects. The result includes various methods for improving the system based on the analysis of bid price and selection procedure.

A Study of Durability Design in the Subway Concrete Box Structure (지하철 콘크리트 BOX구조물의 내구성설계에 대한 연구)

  • Kwon Young-Chan;Kim Eun-Kyum
    • Proceedings of the KSR Conference
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    • pp.940-956
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    • 2004
  • In the course of studying the design of securing the 100-year-long durability of 100 years the subway structure according to the requested service by the Seoul Metropolitan Subway Construction Headquarters, we analyzed 14 construction sites adopting the durability design in subway line No. 9 and concluded as follows: 1. When comparing with 158, the environment index presented for securing 100-year-long durability of subway structure in subway line No. 9, the index of durability was verified as 159.7$\~$179.8 2. When examining the increase value of durability index, we verified that the constructors didn't make various choices in method but they employed the uniformly selected system. 3. Under consideration of the bid form, the construction under bid contract in bulk gave the impacts on the construction cost with attention to selection of the durability index, while the construction under alternative contract in bid adopted uniformly the standard presented by the ordering party.

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Comparison of Cost Performance for Delivery Methods on Public Construction Projects (공공 건설공사 발주방식에 따른 비용성과 비교연구)

  • Lee, Yoo Sub;Kang, Tai Kyung;Shin, Eun Young;Park, Wonyoung
    • Journal of The Korean Society of Civil Engineers
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    • v.33 no.6
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    • pp.2575-2582
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    • 2013
  • In the delivery systems for public construction works, design-build methods such as turn-key and alternative have contributed to improving the quality of structures and developing the construction technology. However, it is pointed out that construction based on a design-build method is likely to waste a budget due to its higher contract price than construction based on a design-bid-build method. Other issues such as contract monopoly, bid rigging and deliberation irregularity in design-build. Since there are not much works have been accomplished to comparatively analyze the actual performance and effect based on delivery methods, discussing and judging the performance and effect of each deliver method with limited information could lead to an error. Thus, this study by extensively investigates the actual project cost data, ranging from contract price to the construction cost of the public construction works and comparatively analyzed the characteristics of each delivery method about cost structure and fluctuation trend. This work is expected to assist stake-holders in properly understanding delivery systems for public construction works and promoting their efficient management.

Orders Status Analysis on the Successful Bidder Decision Method of Turnkey Alternative Tendering Construction (턴키·대안입찰공사 낙찰자 결정방식에 의한 수주현황 분석)

  • Park, Hong-Tae;Lee, Yang-Kyu
    • Journal of The Korean Society of Civil Engineers
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    • v.33 no.2
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    • pp.771-780
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    • 2013
  • Inspection system which was performed in the past selected the final winning bidder by separating Pre-Qualification, the basic design evaluation and price evaluation. However, turnkey and alternative bidding construction has selected way to determine the successful bidder as the best design and the most low cost method, comprehensive evaluation method (bid price adjustment, design score adjustments, weights standard), the best design and the fixed amount method from january 1, 2010 to the present. Due to these institutional problems, orders institutions were often a way to determine the successful bidder to apply differently for identical or similar construction. Therefore this study winning bidder selection criteria through analysis of construction the number and construction order performance, order performance by work division and institutional orders, the weights bidder order performance and orders status of turnkey alternative tendering construction to civil part performed in domestic.

A study of Monolithic Design and Contemporary Architecture Space Constitution (모놀리틱디자인과 현대건축공간구성에 관한 연구)

  • Kim, Jun-Ho;Lee, Jung-Wook
    • Korean Institute of Interior Design Journal
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    • v.26 no.1
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    • pp.3-12
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    • 2017
  • In today's society, Monolithic expresses itself as a single featured work with a consistent exterior in the urban environment. In particular, such characteristics of the monolithic work have become increasingly influential in the modern society with the emergence of the minimalism. Monolithic architecture in modern has common feature which is maintaining simple construction format (Mass) with complicated and abundance space (Volume) inside. This simple architecture exterior leads new stimulus which is different from previous format and evokes unique sensibility and thoughts with monumental expressing. Uniformed exterior revealed thru purity of material builds up strong presence by itself. In contract with simple exterior, diverse space is expressed by consistent concept and process. Through this, it shows creating metaphorical space and space-oriented feature. We can interpret modern monolithic architecture as a sensation and alternative against Gestalt architecture in consequence of chasing clarity, visual stimulus and uncertain tendency only. It provides architectural experience by spatial imaginary and unexpected space development to users through exclusivetendency against outside and stressing un-private, we can evaluate its value as a space-oriented construction which helped us to think about space meaning in modern society.

A Design for a Hyperledger Fabric Blockchain-Based Patch-Management System

  • Song, Kyoung-Tack;Kim, Shee-Ihn;Kim, Seung-Hee
    • Journal of Information Processing Systems
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    • v.16 no.2
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    • pp.301-317
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    • 2020
  • An enterprise patch-management system (PMS) typically supplies a single point of failure (SPOF) of centralization structure. However, a Blockchain system offers features of decentralization, transaction integrity, user certification, and a smart chaincode. This study proposes a Hyperledger Fabric Blockchain-based distributed patch-management system and verifies its technological feasibility through prototyping, so that all participating users can be protected from various threats. In particular, by adopting a private chain for patch file set management, it is designed as a Blockchain system that can enhance security, log management, latest status supervision and monitoring functions. In addition, it uses a Hyperledger Fabric that owns a practical Byzantine fault tolerant consensus algorithm, and implements the functions of upload patch file set, download patch file set, and audit patch file history, which are major features of PMS, as a smart contract (chaincode), and verified this operation. The distributed ledger structure of Blockchain-based PMS can be a solution for distributor and client authentication and forgery problems, SPOF problem, and distribution record reliability problem. It not only presents an alternative to dealing with central management server loads and failures, but it also provides a higher level of security and availability.

An Analysis on affecting factors about lowly using 3D CAD by using the AHP (계층분석법을 이용한 3D CAD 활용 저조에 대한 영향 요인 분석 연구)

  • Lee, Sang-Hyo;Kim, Ju-Hyung;Kim, Kyung-Hwan;Lee, Yoon-Sun;Kim, Jae-Jun;Ahn, Byung-Ju
    • Korean Journal of Construction Engineering and Management
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    • v.8 no.6
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    • pp.188-196
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    • 2007
  • Because the construction is becoming bigger and the construction environment is rapidly changing, IT/IS(Information Technology and Information System) of the construction is recently suggested with the alternative proposal. So not only is a study progressed in the area of the BIM(Buidilng Information Modeling), VC(Virtual Construction) and CIC (Computer-Integrated Construction) but also of the information database of the construction for building the information infrastructure of the construction in the domestic construction. Because object-oriented 3D CAD improves the efficiency of a design work and includes the object information which can use with the base of the information database of the construction, it has the high value not only in the design level but also in the construction life cycle. But compared with the effect, the use of 3D CAD is sluggish in the construction. In this study, after surveying about lowly using 3D CAD on the point of AEC (Architect-Engineer-Contract), the result is analyzed with AHP(Analytic Hierarchy Process). So the aim of this study is to offer the base to find the solution of the Affecting factors about lowly using 3D CAD.

The Study on Application of Fast Track Method for Dam Project Life Cycle′s Analysis (댐 공사에서의 Fast Track을 적용한 생애주기분석에 관한 연구)

  • Yoon, Jae-Ho;Moon, Young-Il
    • Journal of Korea Water Resources Association
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    • v.36 no.5
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    • pp.715-724
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    • 2003
  • It is true that SOC facilities, such as dams, need long life cycles since more time has to be invested for the phases of planning, examination, feasibility study, design, contract, construction, and maintenance. This longer life cycle is easily exposed to the risk. And thus, brings additional cost by the delayed project, convenient loss according to the additional run of use, and benefit lose of not to using the facilities. So, the purpose of this study is to try to find a solution to reduce these time consuming problems which could diminish the whole national competition. Hence, this study is to show efficient, systematical project performance and network model by using reciprocal analyses between the construction period and cost based on economical analysis of each phase of life cycles. In addition, on the basis of these outputs, the Fast Track Method is suggested as an alternative solution as a new Approach in Life Cycle's Analysis.

Automated Generation of Wrapper to Test Components (컴포넌트 테스트를 위한 래퍼의 자동 생성에 관한 연구)

  • Song, Ho-Jin;Choi, Eun-Man
    • Journal of KIISE:Software and Applications
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    • v.32 no.8
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    • pp.704-716
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    • 2005
  • Assembling new software systems from Prepared components is an attractive alternative to traditional software development method to reduce development cost and schedule dramatically. However, if separately developed components are tested, integrated and verified with unreasonable effort and high cost, it would not be an effective way to software development. Components are not distributed in the shape of white-box source code so that should be hard to validate and test in new application environment. For solving this problem, built-in tester components are suggested to check the contract-compliance of their server components. If components have various and complex function, built-in tester should be heavy and unflexible to test in composition of components. This paper suggests enhancing automated wrapper technique which substitutes with built-in tester components and shows the usability of the wrapper by design and implementation. Component testing in this way reduces the cost and effort associated with preparation of component testing and makes the various test experiments in components assembly.