• 대한인간공학회지
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• 제14권2호
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• pp.63-73
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• 1995

An approach to quantitative evaluation of product usability during the design and implementation phases of the product life cycle is presented. The evaluation starts by defining a set of usability characteristics, viz. physical, cognitive and affective characteristic. Each of these characteristics is assessed by a set of usability criteria, such as functionality, visual clarity, learmability, etc. The usability criterion is then evaluated by a checklist consisting of a detailed questionnaire. The fuzzy weighted-checklist method with linguistic variables is used for quantitative analysis. Also, the method for quantifying usability improve- ments in iterative design processes is considered. This analysis procides a quantit- ative measure, which reflects the degree of excellence of product usability during the design and development phases.

• 한국건설관리학회논문집
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• 제16권4호
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• pp.41-49
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• 2015

다중이용시설의 환기부문 에너지소비량이 전체 에너지소비에서 차지하는 비중은 약40%로서 상당히 크다. 환기설비분야의 에너지절약방안으로는 주동력원이자 주요에너지소비원인 전동기를 고효율 제품으로 교체하거나 인버터를 이용한 가변운전을 통하여 에너지를 절감시키는 방안이 있다. 그러나 이런 방안들을 도입하기 위해서는 기존설비보다 높은 초기투자비가 필요하므로 장기적인 관점에서의 경제성평가가 요구된다. 경제성평가 방법으로 생애주기동안 지출되는 모든 비용을 예측하는 LCCA(Life Cycle Cost Analysis)가 적절하지만 LCCA는 분석내용이 단순 비용절감측면에 치중되어 있어, 환경영향을 고려하지 못하는 한계가 있다. 환경영향을 분석하기 위한 방법으로 LCA(Life Cycle Assessment)있지만 이는 주로 건축물에만 사용되어왔고 또한 환경적인 측면만 치중하여 경제적은 측면을 고려하지 못하는 한계가 있다. 이에 본 연구에서는 LCCA 및 LCA를 이용해 경제적 측면 및 환경적 영향을 종합적으로 분석하여 다중이용시설 환기설비에 고효율 전동기 도입의 타당성 검토를 진행하고자 한다.

• International Journal of CAD/CAM
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• 제5권1호
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• pp.99-109
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• 2005

This paper introduces an approach to an ontology-based multi-level knowledge framework for a knowledge management system for discrete-product development. Participants in a product life cycle want to share comprehensive product knowledge without any ambiguity and heterogeneity. However, previous knowledge management approaches are limited in providing those aspects: therefore, we suggest an ontology-based multi-level knowledge framework (OBMKF). The bottom level, the axiom, specifies the semantics of concepts and relations of knowledge so ambiguity can be alleviated. The middle level is a product development knowledge map; it defines the concepts and the relations of the product domain knowledge and guides the engineer to process their engineering decisions. The middle level is then classified further into more detailed levels, such as generic product level, specific product level, product version level, and manufactured item level, according to the various viewpoints. The top level is specialized knowledge for a specific domain that gives the solution of a specific task or problem. It is classified into three knowledge types: expert knowledge, engineering function knowledge, and data-analysis-based knowledge. This proposed framework is based on ontology to accommodate a comprehensive range of knowledge and is represented with first-order logic to maintain a uniform representation.

• 품질경영학회지
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• 제26권1호
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• pp.27-47
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• 1998

The primary objective of this research is to provide the basis of total quality management policies by reviewing previous studies which investigated effective ways to reduce product liability exposure. Specifically, the present study intends (1) to examine recent patterns and trends of product liability law in OECD countries, (2) to propose quality management policies for preventing product liability litigations, and (3) to guide the proper implementation process of ISO 9000 certification programs. The survey results show that the shift from a negligence law theory to strict liability is evident in most countries. The trend has led to make it easier for consumers to bring product liability lawsuits. Furthermore, the damage awards won by consumers have been drastically increasing. To minimize product liability exposure, manufactures should reflect comprehensive product safety concepts in establishing total quality management policies. Cooperative activities are also required between departments in companies to reach safe and satisfactory quality level. These quality management activities should be performed consistently during the total product life cycle. Failure to comply with the ISO 9000 certifications might be used as an evidence of negligence or as evidence of a design defect in court. Previous lawsuit cases, however, reveal that ISO 9001-9003 registration process alone is not sufficient in terms of product liability pervention perspectives. Therefore, manufactures should take into account ISO 9004 before implementing any other section of ISO 9000 standards.

• 한국경영과학회지
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• 제10권1호
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• pp.65-78
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• 1985

In this paper, the approach getting a total demand by forecasting the new demand and the replacement demand separately and adding them is used for long term forecasting of durable goods. Cross country analysis using the income as an independent variable and S-shaped growth curve as a fitting model is developed as a method of forecasting new demand. To get the replacement demand the methods using the number of ownership and the replacement rate and the methods using the past demand and the distribution of the product life are proposed. And the theoretical explannation for product life cycle's diversity, which is the one of the major considerations in the long term forecasting, is attempted by the combination of the new demand and the replacement demand patterns. This is applicated the long term forecasting of Korean passenger cars.

• 산업경영시스템학회지
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• 제30권3호
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• pp.127-134
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• 2007

Predicting fatigue life of rubber components is an important issue in design procedure for industrial trucks to assure the durability and reliability. Main considerations in designing rubber components against fatigue failure are the compounding technology, shape design, and manufacturing process. Among them the rubber compounding technology is one of the most critical factor to determine more than 50% of component's quality. This paper presents how to improve the durability and reliability of industrial rubber mount during its design, development and prototype testing. The data presented illustrates explicitly the prediction of reliability growth in the product development cycle. The application of these techniques is a part of the product assurance function that plays an important role in rubber components reliability improvement.

• 산업공학
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• 제7권3호
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• pp.77-90
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• 1994

Recently, it has been widely conceived that Concurrent Enginering (CE) can provide a competitive edge for companies that have confronted with rapidly changing market requirements, such as shortening of product life-cycles, high quality and low cost products, diversity of customer demand, and so on. CE is generally recognized as a practice to bridge the gap between designing a product and other various life-cycle activities, such as manufacturing, assembly, testing, and maintenance, at an early stage of design. In this paper the concepts of CE is first overviewed, and many of its supporting tools are discussed. It is then proposed an architecture of a CE support system that can provide a unifying view of the tools. Finally, a case that has successfully implemented the concepts is presented.

• 정보처리학회논문지A
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• 제18A권3호
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• pp.81-92
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• 2011

제품수명주기(Product life cycle) 중 설계단계에서 생성되는 3차원 CAD 데이터를 다양한 단계에서 활용하고자하는 노력이 관련 산업 분야에서 이루어져 왔다. 그러나 3차원 CAD 데이터는 데이터 처리를 위한 많은 컴퓨팅 자원을 요구하고 설계지식이 유출될 수 있는 위험이 있으며, 라이선스 비용이 따르기 때문에 원격지 협업 검토나 마케팅, 전자 기술 매뉴얼과 같은 서비스단계에서 활용하기에 적합하지 않다. 이러한 문제점들을 해결하기 위해 경량화된 가시화 파일형식과 이를 적용한 응용시스템에 대한 다양한 연구가 수행되었으나, 제안된 경량화 파일형식들은 대부분 기업 혹은 기관의 독자적인 형식으로 서로 간에 공유될 수 없으며, 제품의 형상 정보와 함께 제품구조 정보를 표현하는데 한계점을 보이고 있다. 본 연구에서는 이를 해결하기 위하여 웹 기반 3차원 그래픽 표준인 X3D를 활용하여 제품의 형상 정보뿐만 아니라 구조 정보의 표현이 가능한 X3D 기반 데이터 집합인 prod-X3D(Enhanced X3D Dataset for Web-based Visualization of 3D CAD Product Model)를 정의하고, 3차원 CAD 데이터로부터의 변환 기법을 제안한다.

• Journal of Information Technology Applications and Management
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• 제27권1호
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• pp.97-109
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• 2020

It is expected that the Fourth Industrial Revolution will have a great impact on the manufacturing industry, especially as it will cause big changes in industry, economy as well as socio-cultural. To cope with this situation, each country is promoting the policy of cultivating its manufacturing. This study derives the effect of the fourth industrial revolution on product lifecycle management for smart manufacturing through expert's cognitive analysis. The knowledge area of product lifecycle management is divided into Project Portfolio Management, Collaborative Product Design, Customer Needs Management, Direct Material Sourcing, Product Data Management, Digital Manufacturing & Engineering, R&D Foundation, New Product Development through academic research. The expert survey was conducted in five different perspectives: Importance, Insufficiency. Then, using the results of the survey and the academic research the implication about Product Lifecycle Management were derived. The significance of this study is that it derives the change areas and factors of the product life cycle management knowledge domain in preparation for the fourth industrial revolution according to the perspective of importance and insufficiency.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
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• 제12권10호
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• pp.309-318
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• 2023

최근 세계 각국은 온실가스 배출을 규제하기 위해 전과정평가(LCA, Life Cycle Assessment)를 도입하려는 움직임을 보이고 있다. 전기차 전과정평가는 차량의 전체 수명주기에 걸쳐 발생하는 온실가스 배출량을 측정하고 평가하는 수단이다. 전과정평가 결과의 신뢰성을 높이기 위해서는 전기차 부품별로 신뢰성 있는 데이터가 필요하다. 이를 위해 최근 블록체인 기술을 적용한 전과정평가 모델에 대한 연구들이 수행되었다. 그러나 기존 연구들은 주요 제품 정보들이 다른 참여자들에게 그대로 노출되어 프라이버서 보호가 되지 않는 문제가 있고 부품데이터 정보가 업데이트될 때마다 트랜잭션 형태로 블록체인 원장에 기록해야 해서 비효율적이다. 따라서 본 논문에서는 효율적으로 전기차 차량부품 데이터를 수집하고 유효성을 검증하기 위해 전과정평가를 위한 DID 기반의 데이터수집 모델을 제안한다. 제안하는 모델은 수집된 데이터의 유효성과 무결성을 보장하며 블록체인 원장에는 사용자 인증 정보만 공유되어 데이터의 무분별한 노출을 방지하고 데이터의 출처를 효율적으로 검증 및 업데이트할 수 있다.