• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 춘계 학술논문 발표대회 1부
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• pp.207-209
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• 2011

Numerous reports show that alternative project delivery systems (PDSs) such as design-build (DB), construction management at risk (CMR), and design-build-maintain (DBM) are increasingly used in many countries. This study compared characteristics of each PDS (design-bid-build (DBB), DB, CMR, or DBM) by analyzing quantitative data from 9 research articles. In order to compare characteristics between DBB and alternative PDSs, the study is based on principal 3 factors - Time, Cost, and Quality. DB shows the best performance in the time part and also the cost performance depending on facility type and project size. The performance of quality has minor difference among different PDSs. These results support the fact that using an appropriate PDS by the characteristic of a project makes high value of efficiency and productivity.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2008년도 정기학술발표대회 논문집
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• pp.634-637
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• 2008

성능발주방식은 발주자가 건축물의 요구성능만을 시공자에게 제시하여 시공자가 자유로이 재료, 기술, 공법을 선택할 수 있게 하는 발주방식으로, 공사의 입찰단계에서 확정되지 않은 부분의 시공방법 등에 대한 기술제안을 널리 모집 심사하여 경쟁참가대상을 결정한 후, 가격경쟁에 의해 낙찰자를 결정하는 방식의 기술제안형 입찰과 시설물 준공이후 일정기간 동안 미리 결정한 일정수준의 성능을 유지하는 것에 대한 책임을 전적으로 시공자가 부담하는 성능보증계약제도의 상위 개념이라고 할 수 있다. 성능체계의 미비, 발주자의 성능에 대한 무지가 성능발주방식의 활용 저해요인으로 보고 이를 해결하기 위해 ECRS기법을 사용하여 성능체계를 구축하고, 발주자의 편의를 위한 공동주택 성능표시 제도를 활용한 발주자용 요구성능 체크리스트를 제안한다. 요구성능 체크리스트는 발주자와 시공사의 의사소통수단으로 사용되며 일종의 증거자료로 계약 등의 프로젝트 절차 수행이 수월해진다.

• 로봇학회논문지
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• 제16권4호
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• pp.327-335
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• 2021

In this paper, we propose an embedded robot system based on "ROS2 on Yocto" that can support various robots. We developed a lightweight OS based on the Yocto Project as a next-generation robot platform targeting cloud robotics. Yocto Project was adopted for portability and scalability in both software and hardware, and ROS2 was adopted and optimized considering a low specification embedded hardware system. We developed SLAM, navigation, path planning, and motion for the proposed robot system validation. For verification of software packages, we applied it to home cleaning robot and indoor delivery robot that were already commercialized by LG Electronics and verified they can do autonomous driving, obstacle recognition, and avoidance driving. Memory usage and network I/O have been improved by applying the binary launch method based on shell and mmap application as opposed to the conventional Python method. Finally, we verified the possibility of mass production and commercialization of the proposed system through performance evaluation from CPU and memory perspective.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.928-934
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• 2009

Although the evolution and deployment of information technologies will undoubtedly play an important role in the current construction industry, many engineers are still unsure of the economic value of using these technologies. Especially for the planning of a construction project, a collaboration system to utilize the whole resources is a essential tool for the successful outcome. A detailed, authoritative, and readily accessible information model is needed to enable engineers to make cost-effective decisions among established and innovative plan alternatives. Most engineers rely on limited private experiences when they create solutions or design alternatives. Initial planning is crucial for the success of the construction project. Most construction projects are done through collaboration of engineers who have different specialized knowledge. Information technologies can dramatically enhance the performance of the collaboration. For the information delivery, we need a mediator between engineers. Object-based 3-D models are useful for the communication and decision assistance for the intelligent project design. In this paper, basic guidelines for the 3-D design according to different construction processes are suggested. Adequate interoperability of 3-D objects from any CAD system is essential for the collaboration. Basic architectures of geometry models and their information layer were established to enable interoperability for design checks, estimation and simulation. A typical international project for roadway was chosen for the pilot project. 3-D GIS model was created and bridge information models were created considering several requirements for planning and decision making of the project. From the pilot test, the integrated construction project planning using 3-D information models was discussed and several guidelines were suggested.

• 국제학술발표논문집
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• The 8th International Conference on Construction Engineering and Project Management
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• pp.493-502
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• 2020

Traditionally, road projects are initiated based on an assessment of their economic benefit, after which the environmental, social and governance effects are addressed discretely for the project according to a set of predetermined alternatives. Sustainable road infrastructure planning is vital as issues like diminishing access to road construction supplies, water scarcity, Greenhouse Gas emissions, road-related fatalities and congestion pricing etc., have imposed severe economic, social, and environmental damages to the society. In the process of addressing these sustainability factors in the operational phase of the project, the dynamics of these factors are generally ignored. This paper argues that effective delivery of sustainable roads should consider such dynamics and highlights how different aspects of sustainability have the potential to affect project sustainability. The paper initially presents the different sustainability-assessment tools that have been developed to determine the sustainability performance of road projects and discuss the inability of these tools to model the interrelationships among sustainability-related factors. The paper then argues the need for a new assessment framework that facilitates modelling these dynamics at the macro-level (system level) and helping policymakers for sustainable infrastructure planning through evaluating regulatory policies.

• 대한토목학회논문집
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• 제33권6호
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• pp.2575-2582
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• 2013

공공건설공사 발주제도 운영에 있어 기술경쟁을 지향하는 턴키 및 대안방식 등 설계 시공일괄방식의 경우, 시설물의 품질향상 및 건설기술 발전에 기여하였음에도 불구, 계약되는 공사비가 설계 시공 분리발주방식을 적용하는 공사보다 높아 예산낭비 우려가 있다는 지적과 함께 수주독점, 입찰담합, 심의비리 등의 문제가 쟁점이 되고 있다. 그러나 실제 발주방식별 사업성과와 효과에 대해 정밀 비교분석한 사례가 없는 실정이며, 단순히 낙찰률 등 사업의 한정된 일반적 정보만으로 사업효과를 논의하고 판단하는 것은 자칫 오류를 범할 우려가 있다. 이에 공공 건설공사를 대상으로 계약에서 준공에 이르기까지 실제 집행한 공사비 자료를 광범위하게 조사하여 비용의 투입구조 및 변동추세 등 발주방식별 특성을 비교분석하고 공공건설공사 발주제도의 올바른 이해와 효율적 운영을 도모하고자 한다.

• Journal of Construction Engineering and Project Management
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• 제5권3호
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• pp.18-28
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• 2015

Bidding and contract systems are used for public construction projects to select contractors following fair competition principles and to execute national budgets effectively. Many challenges have arisen due to a lack of transparency and fairness and because bidding practices have been luck-based. Few comprehensive or comparative analyses have been conducted on the performance and limitations of bidding and contract systems, and empirical analyses designed to improve policies on and the practice of such systems are lacking. This study empirically analyzed current bidding and contract systems to seek ways of improving them. The study proposes several alternatives to resolve the problems with and irrationalities of the current system: 1) improving bidding and selection systems by changing them from a luck-based price competition into a technical merit- and value-based competition; 2) improving the assessment criteria to meet the current market level of bid and winning prices; 3) adjusting contractual responsibilities and sharing structures to meet the current trend; and 4) strengthening the competitiveness and expanding the social responsibility-based procurement systems of construction companies.

• 한국건설관리학회논문집
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• 제16권2호
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• pp.12-20
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• 2015

공공프로젝트 발주자들에게 VE의 중요성이 점증되고 있다. 본 연구에서는 VE 공공발주체계의 과학화, 시스템화를 통하여 공공발주자의 의사결정을 객관화시키고 발주체계 관련자들의 상호신뢰 회복을 위한 의사결정 지원체계의 구축을 위하여, 공공발주자에게 미치는 VE 프로젝트 발주체계의 영향력 분석에 대한 DB를 구축하는데 그 목적이 있다. 이에 국내의 VE 수행현황 분석을 통하여 수행체계의 문제점을 고찰하고, 도출된 문제점의 개선을 위하여 건설VE 수행사례를 통한 프로젝트 발주 시 고려하여야 할 VE 영향요소를 추출하여 설문결과에 대한 회귀분석 및 요인분석을 통하여 전체의 60%이상의 영향력을 가지는 15개의 영향요소를 도출한다. 도출된 영향요소에 대한 AHP분석을 통하여 프로젝트 생애주기 동안의 각 단계에 미치는 영향력을 분석하여 제시하였다.

• 한국멀티미디어학회논문지
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• 제17권4호
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• pp.490-505
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• 2014

IT governance in order to achieve the strategic goals of the organization, leadership, organizational structure, and the process is defined. In order to achieve IT governance, organizational structure, leadership for spindle formation, maintenance, and standardized processes to specific and an effective ITIL (Information Technology Infrastructure Library) management model is needed. In this study, the K Authority Management Model of IT Governance ITIL - based research on service delivery and customer satisfaction through the effective information for ITSM (Information Technology Service Management, IT Service Management) building measures, information for business planning and performance management PMS (Project Management System, project Management System), survey on ICT service levels established through the process of planning and construction management models such as ITIL future research on the public portion of the proceeds from the ITIL management model can be utilized as a guideline when establishing a theoretical presents a base.

• 한국시뮬레이션학회논문지
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• 제11권3호
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• pp.59-65
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• 2002

Semiconductor wafer fabrication is a business of high capital investment and fast changing nature. To be competitive, the production in a fab needs to be effectively planned and scheduled starting from the ramping up phase, so that the business goals such as on-time delivery, high output volume and effective use of capital intensive equipment can be achieved. Project executed that use conveyor in bay semiconductor A line. But conveyor capability is lacking and rundown happened in equipment. Do design without normal simulation and conveyor system failed. The comparison is peformed through simulation using .AutoMod a window 98 based discrete system simulation software, as a tool for comparing performance of proposed layouts. In this research estimate optimum conveyor capability, there is the purpose.