• 한국가스학회지
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• 제26권4호
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• pp.9-17
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• 2022

본 연구는 기존 연구에서 다루었던 기체상태의 CO₂를 송출시 주입관내 상변화 및 유동특성 연구의 계속으로 액체 상태의 CO₂를 송출하여 초임계 상태로 주입시의 연구 결과이다. 지중에 CO₂를 저장하는 기술은 높은 주입성, 저장량 및 경제성으로 기후 변화를 완화하는 효율적인 방법중 하나이다. 심부 대수층에 CO₂를 주입 및 저장하는 실증 프로젝트인 포항분지 CO₂ 지중저장 사업은 미래 대규모 CO₂ 지중 저장 사업에 필요한 기술을 개발하는데 목적이 있다. 이 사업의 설계 단계에서 고려해야 하는 문제 중 하나는 CO₂를 주입시 주입관내 CO₂의 상(phase)변화 및 그에 따른 유동특성의 분석이다. 이러한 문제 해결을 위해 주입량에 따른 압력, 온도 및 열역학적인 물성값 등을 계산하여 주입설비의 송출 조건을 결정한다. 본 연구를 위해 액체 상태의 CO₂를 송출하고 초임계로 변하는 주입관내 상변화 및 유동 특성을 OLGA 프로그램을 사용하여 수치해석적으로 분석하였다. 결과를 통하여 CO₂의 주입 시스템과 저장소의 공저압을 연계하는 주입 송출 조건을 제시하였다.

• 품질경영학회지
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• 제33권3호
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• pp.135-148
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• 2005

This paper considers a six sigma project for reducing the project costs through project risk management. The project follows a disciplined process of five phases: define, measure, analyze, improve, and control. A risk management process map is used to identify process input and output variables. Seven key process input variables are selected by using C&E diagram and X-Y matrix and finally four vital few input variables are selected by the related statistical analysis. The optimum alternatives of the vital few input variables are obtained by the method of PUGH matrix. The process is running on control plan and we obtained substantial project cost reductions in early stage of the control phase.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.284-291
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• 2022

Historical data from comparable projects can serve as benchmarking data for an ongoing project's planning during the project scoping phase. As project owners typically store substantial amounts of data generated throughout project life cycles in digitized databases, they can capture appropriate data to support various project planning activities by accessing digital databases. One of the most important work tasks in this process is identifying one or more past projects comparable to a new project. The uniqueness and complexity of construction projects along with unorganized data, impede the reliable identification of comparable past projects. A project scope document provides the preliminary overview of a project in terms of the extent of the project and project requirements. However, narratives and free-formatted descriptions of project scopes are a significant and time-consuming barrier if a human needs to review them and determine similar projects. This study proposes an Artificial Intelligence-driven model for analyzing project scope descriptions and evaluating project similarity using natural language processing (NLP) techniques. The proposed algorithm can intelligently a) extract major work activities from unstructured descriptions held in a database and b) quantify similarities by considering the semantic features of texts representing work activities. The proposed model enhances historical comparable project identification by systematically analyzing project scopes.

• 기술혁신연구
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• 제2권1호
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• pp.116-141
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• 1994

This paper presents a model for R&D project selection and evaluation system design developed through literature review. The model emphasizes the fitness between the five elements of the system : evaluation phase and purpose, personnel and organization, evaluation critiria and decision model, evaluation form and procedure, and projects. The model was applied in real situation as a test case. The important findings are that a good project selection and evaluation model contributes only partially to the effectiveness of the project selection and that system development and implementation activity is a dynamic and multi-facetted learning process.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.606-615
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• 2009

Estimating the reasonable construction-cost according to the construction phase in public construction is an important element for securing and executing a national budget efficiently. As a general rule, the predetermined cost of construction is estimated at the end of the design of the target structure. Therefore, it seems to be a considerably difficult problem to estimate the approximate cost of construction, only with its basic information of the bridge in the design planning phase and the early design stage where we can not have specific detailed-section of the target structure. In this paper, we present the calculation of construction-cost in the planning phase based on the analysis of factors affecting the cost of construction conducted in the previous study. Beside, to estimate the cost of construction in early design phase, we would like to present the calculation of construction-cost in the early design phase by executing the analysis of data collected from 61 steel box bridges. It was found from the result of study that the estimated cost of construction gained by the calculation of construction-cost in this paper reduces the error between the real cost of construction and that by the existing method of using.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제14권4호
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• pp.47-54
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• 2008

Preconstruction process in a lean project delivery system was studied in one large healthcare project working for a general contractor. Researchers joined a new lean delivery project for approximately six weeks and participated in preconstruction process including design coordination, management coordination, and target costing while concurrently interviewing other project participants and employees, recording activity in meetings, and otherwise observing the process. The preconstruction process in lean project delivery system, called integrated project design, showed many benefits such as brining expertise of downstream players (i.e., mechanical and electrical contractors) into the design phase. However, lack of leadership and lack of design-integrator blocked the successful application of a new concept of design process.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.754-757
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• 2005

Construction firms attempt to improve project performance by adopting technology. However, the advantages gained from technology utilization are still not clear. Lack of information regarding technology benefits has resulted in industry reluctance to implement new technology. Therefore, there are needs for studies that quantify the impacts of technology utilization on project performance. An industry-wide survey was used to collect project data from 70 capital facility projects on the issue of technology usage and project owner satisfaction parameter. This paper reports on integration/automation technology usage in the Taiwanese construction industry and associated impacts on project owner satisfaction. In addition, integration and automation technology findings are presented by project phase. The analyses indicate that projects with owner satisfaction have, on average, higher levels of technology utilization than projects with owner dissatisfaction for all technology usage metrics analyzed.

• 한국건설관리학회논문집
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• 제13권2호
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• pp.11-24
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• 2012

최근 공공사업 발주조건에 BIM(Building Information Modeling)이 의무화되고 있고, 실무 도입을 통한 성공 사례가 증가되면서 건설 분야의 BIM 도입이 본격화되고 있다. 그러나 기존의 BIM 관련 연구는 대부분 설계 또는 시공단계에 한정되어 수행됨에 따라 건설프로젝트의 생애주기를 고려하지 못하고 있고, 특정 업무지원 기능 위주로 진행되고 있다. 따라서 본 연구에서는 건설공사 프로젝트의 기획부터 유지관리단계의 생애주기 동안 단계별 BIM 적용이 가능한 통합 BIM 운영 프로세스를 제안하고 이를 토대로 통합 BIM 시스템을 개발한다. 이를 위해 교량공사를 대상으로 수행단계별 정보체계를 분석하여 BIM 활용 기능과 적용 프로세스를 제시하였으며, 이에 근거하여 수행단계별 BIM 운영 시스템을 구축하였다. 연구에서는 개발된 시스템의 실무 적합성 검증을 위해서 사례적용과 건설 실무자의 활용성 설문 조사를 수행하였다. 이러한 BIM 통합 운영체계는 생애주기를 고려한 건설공사의 3차원 기반 통합정보관리체계로 활용성이 기대된다.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2008년도 춘계 종합학술대회 논문집
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• pp.458-461
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• 2008

도시재생사업을 수행하기 위해서는 다양한 활동이 전개되는 기성시가지에 대한 체계적 조사와 분석이 요구되며, 이러한 조사와 분석을 바탕으로 한 도시재생사업의 지원과 관리는 무엇보다도 종합적인 시스템 차원에서 접근되어야 한다. 이러한 시스템은 도시재생사업의 전 단계에서 활용될 수 있으며, 기 구축되어 활용되고 있는 관련 GIS와의 연계 및 활용이 매우 중요하다. 이에 본 연구는 도시재생사업을 위한 종합시스템 구축의 기본적인 전략을 제시하며, 제시된 시스템 구축 전략은 도시재생사업의 전 단계를 지원할 수 있는 시스템 구축에 기여할 뿐만 아니라, 중앙정부 및 지방정부에서 기 구축한 시스템의 활용을 고도화할 수 있는 기회를 제공할 것이라 판단된다.

• 시스템엔지니어링학술지
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• 제19권1호
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• pp.79-90
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• 2023

In principle, R&D of general weapons systems are led by companies or government-funded organizations. In terms of project execution, the defense R&D planning system was reorganized to conduct SE-based project management by integrating the naval ship project execution procedure into the general weapon system R&D procedure. The development progress was confirmed according to the guide for SE application of DAPA, and a technical review meeting was proposed to enter into the each next phase in the R&D process. This paper focuses on improvement for technical review in terms of technical management based on system engineering for R&D mounted weapon systems and the naval surface ship project in preliminary design and detailed design. So, the improvement direction for reviewing the entry criteria for the R&D weapons systems of the naval ship and mounted weapons is proposed.