• Korean Journal of Construction Engineering and Management
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• v.9 no.4
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• pp.66-74
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• 2008

Warranty contracting for pavements construction has been widely used in Europeans countries, Japan, and the U.S. and the benefits of warranty contract has been proven. This research investigated the European, U.S., and Japanese warranty contract policies and compared pros and cons. The most appropriate warranty contract policy solution is developed to fit in the Korean construction industry culture. Three main conclusions have been developed in this study: (1) performance specifications should be developed; (2) the systematic method is required to estimate the appropriate costs of performance bond and warranty period, etc.; and (3) short and long term plans for adopting performance warranty contract in Korea are suggested.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2008.11a
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• pp.216-221
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• 2008

This study has been carried out in order to observe the status of performance warranty contracting system currently being implemented at the advanced countries including Europe, U.S.A., and Japan, review the introduction feasibility and possibility. For this purposes this study has surveyed the concept and necessity of performance warranty contracting system as well as the status of domestic performance warranty contracting system. Especially the application environment for the performance warranty contracting system of Europe, U.S.A., Japan and Korea in terms of maintenance guarantee liability system, performance warranty regulations for design-build contracting system, selection method of successful bidder, performance warranty means, project contracting system including maintenance cost, and specifications and contract conditions for performance warranty system have been comparatively evaluated. And introduction methods of performance warranty contracting system were suggested.

• International Journal of Highway Engineering
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• v.13 no.3
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• pp.65-73
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• 2011

Recently, researches to introduce the performance warranty contract are in progress for quality improvement of road pavements. The performance warranty contract is a type of contract in which contractors guarantee to maintain certain level of performance during a period from completion of construction. The contract use in Europe and the U.S is being increased because it has been known to contribute to improvement of structure quality, reduction of life cycle cost, development of construction techniques, and etc. The research on performance indicators, threshold values, and warranty durations is essential to effectively introduce the contract in Korea. In this study, literatures on the performance warranty contract for concrete pavements of the Minnesota, Indiana, and Florida of the U.S. were reviewed. Major distresses influencing the pavement performance were investigated and analyzed in the jointed concrete pavement sections of 21 Korean expressway routes to be compared to the performance indicators, threshold values, and warranty durations of the states. More accurate comparison is expected by investigation in planned sections for a long time.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.987-990
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• 2007

Warranty contracting is contracting methods that European Countries have applied to asphalt pavement projects from long ago, and in America as the expected effects of the warranty contracting are being verified to introduce it, the number of projects with warranty is being increased rapidly. In Japan, the warranty contracting suitable for Japanese style was established and is being applied. This study investigated and analyzed the present state of the warranty contracting being applied to European countries, America and Japan, and suggested advantages and disadvantages in introducing the warranty contracting into Korea and directions to introduce it. The principal result of this study is that performance bond contract system, performance surety bond system and performance bidding system should be established to introduce the warranty contracting into Korea.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.3D
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• pp.279-288
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• 2010

Recently, researches on the performance warranty contracting has been going on to improve construction quality in road pavement area. The performance warranty contracting gives construction companies opportunity to select materials and methods freely while asks them to maintain a certain level of performance during a given period. To introduce the performance warranty contracting in Korea, lots of research results on performance indicator and threshold value of asphalt pavement have been made to be included in the warranty specification. However, research effort on the performance indicator and threshold value of concrete pavement which is commonly constructed in expressway and national highway has not been enough. In this study, the warranty duration, performance indicator, and threshold value of the concrete pavement were investigated by reviewing literatures on cases of the performance warranty contracting in European countries and states of the US. Major distresses influencing the performance of jointed concrete pavement were investigated and analyzed to be compared to the warranty duration, performance indicator, and threshold value of foreign countries.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.31 no.6D
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• pp.793-801
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• 2011

Existing specifications of road pavement require contractors to meet only materials and construction conditions regardless of pavement life. There are limitation of developing road pavement technology and possibility causing dispute between ordering organization and contractor with this type of specification. Research efforts to introduce performance warranty contracting are in progress in the field of road pavement to improve the problems. The performance warranty contracting gives the contractors opportunity to select materials and construction methods as they like. But they should satisfy a certain level of performance during a given period. The performance indicator and threshold value of pavement which are main elements of the warranty specification should be defined first to introduce the performance warranty contracting successfully. In this study, the performance indicator, threshold value, and warranty duration of asphalt pavement were investigated by reviewing literatures on performance warranty contracting of some states of the US. Major distresses influencing the performance of the asphalt pavement were investigated at 24 national expressway lines and national highway lines in 16 regions, and the data were analyzed to be compared to the cases of the US. Development of rational performance warranty specification for domestic asphalt pavement is expected based on the research results.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.687-690
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• 2007

This study is a basic research on looking onto bringing performance warranty contract into the country, to consider the usage in architecture which it is usually used on road pavement in developed countries. The study will also apply performance warranty contracts on public private partnerships through examination and analysis of various matters which will lead to globalization of the korean architecture industry, the increase of quality of result, better convenience for the orderer, the decrease of cost, and the acceleration on research for technical development.

• Defense and Technology
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• no.11 s.297
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• pp.70-83
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• 2003

무기체계의 품질보증을 위해서는 소프트웨어에 대한 품질보증을 발전시켜야 한다. 무기체계의 소프트웨어 의존도는 증대되고 있으나 소프트웨어에 대한 품질보증 및 형상관리는 미흡했던 것이 사실이다. 품관소는 '01년부터 소프트웨어 품질보증팀을 창설하고 국방규격화 업무수행에 착수한 바 있다. 앞으로도 각 기관과 유기적인 협조를 통해 소프트웨어 규격화 및 품질보증업무를 수행하고 재사용과 성능개선이 가능하도록 관련자료를 국방자산의 하나로 유지하고 관리함으로 국방예산 절감에도 기여할 수 있어야 하겠다.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 1998.04a
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• pp.3-3
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• 1998

KF-16 항공기용 F100-229 엔진 부품 중 국내에서 생산되는 부품에 대한 초도품 품질보증방법의 일환으로 내구성시험을 국내에서 수행하였다. 그동안 국내에서의 항공기 엔진산업은 사용중인 엔진의 정비 혹은 민항기 엔진 일부 부품을 기계 가공하여 납품하는 수준이었으므로 특별한 품질보증 시험이 요구되지 않았으나, KFP 사업을 시작하면서 일부 주요부품은 국내에서 직접 생산하여 KF-16 항공기용 엔진에 장착하게 되므로 완제 엔진을 조립 생산할 수 있는 능력의 확보뿐만 아니라 적절한 품질보증 대책이 요구되었다. 이에 따라 국내 생산된 완제 엔진의 조립성과 일부 단품에 대한 품질보증 확보방안으로 엔진의 개발 및 부품개량시 설계수명 및 설계규격의 만족여부를 검증하는 시험인 엔진 내구성시험(Engine Accelerated Mission Test)기법을 적용하여 1차와 2차에 걸쳐 품질보증시험을 수행하였다. 시험결과 완제 엔진의 조립성, 추진성능, 부품의 내구도 확인에 의한 품질보증 적합성 여부를 확인할 수 있었으며, 본 시험평가 기법을 통하여 시험 후 부품의 검사 및 평가방법과 기준을 제시하였고, 군용 엔진 내구성시험의 요구조건, 시험절차, 시험항목 등을 확립하였다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.07a
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• pp.37-40
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• 2020

최근 블록체인이 활성화되면서 블록체인 시장 및 블록체인 모델의 활용도가 늘어나고 있다. 그중 하이퍼레저 패브릭은 프라이빗 블록체인의 대표적인 플랫폼이다. 하이퍼레저 패브릭에서 클라이언트는 트랜잭션을 보증 피어에게 전송할 때 사전에 정해진 보증 피어에게만 전송한다. 이는 트랜잭션의 실행 비용 및 보증 피어의 성능을 고려하지 않아 보증 시간을 증가시키는 문제가 발생한다. 본 논문은 이 문제를 해결하기 위해 트랜잭션의 실행 비용에 따라 효율적으로 보증 피어를 라우팅하는 기법을 제안한다.