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배상윤(Sang-Yoon Bae),서효원(HyoWon, Suh),제임스모리슨(James R. Morrison) (사)한국CDE학회 2016 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2016 No.동계
Because of complexity of plant modularization process, decision making is one of the essential issue. However, there are a few studies have been conducted about cost breakdown structure and cost optimization for plant modularization and construction field. This research analyze plant modularization process and reveal that the existing EPC (Engineering, Procurement, Construction) process can be decomposed to EPFTC (Engineering, Procurement, Fabrication, Transportation, Construction) for modeling modularization process, and construct the cost breakdown structure based on that process. Finally, this research also propose the cost optimization model based on constructed cost breakdown structure.
사례기반추론을 이용한 제품 설계 단계별 전과정 평가 방법론
정면규(Jeong, Myeon-Gyu),제임스 모리슨(James R. Morrison),서효원(Suh, Hyo-Won) (사)한국CDE학회 2010 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2010 No.1
Life Cycle Assessment is systematic methodology for an analysis of environmental load during entire product life cycle and evaluation of potential environmental effects. It can be useful to eco-design and dealing with environmental regulation. However, general LCA process requires a lot of money and times to collect related data and information. Although studies have been made on the streamlined LCA to overcome above limits, they still cannot be applied into early stage of product design. For this reason, existing method are not able to carry out active eco-design from the early design stage. Therefore, we will propose the approximated LCA methodology which can be applicable to early stage of product design and systematic selective-LCA methodology after detail design stage. For an approximated LCA, Environmental Character Evaluation Matrix (ECEM) and Case-based Reasoning system using FBSe expression was developed. This CBR system can be applied to each design stage for referring the LCA result of product or part/module. Also, the concept of relative importance was introduced to select import parts/modules considered in selective LCA. A case study using mobile phone shows the proposed SLCA methodology can be applicable to eco-product design effectively.
이민호(Minho Lee),서효원(Hyowon Seo),제임스 모리슨(James R. Morrison) (사)한국CDE학회 2016 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2016 No.동계
프로젝트 설계의 목적은 비용의 절감과 기간의 단축에 있다. 동시병행 프로세스 최적화는 이러한 효율적인 설계를 위한 유용한 방법 중 하나이다. 본 연구에서는 프로세스간 동시병행을 세부 태스크간 정보교환으로 확장하고, 태스크 별 신뢰도(Reliability)와 민감도(Sensitivity)를 이용하여 재작업 발생에 대한 리스크를 고려하였다. 재작업 발생확률 및 기간과 전체 프로세스 기간 단축으로 인한 트레이드 오프를 고려하여 최적의 프로젝트 스케줄을 찾는 것이 목적이다. 또한, MILP(Mixed Integer Linear Programming) 최적화 모델을 통해 간단한 예제를 통해 최적해를 찾고 결론을 도출하였다.