• 시스템엔지니어링학술지
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• 제9권1호
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• pp.65-84
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• 2013

This paper introduces a systems engineering approach to reliability centered maintenance to address some of the weaknesses. Reliability centered maintenance is a systematic, disciplined process that produces an efficient equipment management strategy to reduce the probability of failure [1]. The study identifies the need for RCM, requirements analysis, design for RCM implementation. Value modeling is used to evaluate the value measures of RCM. The system boundary for the study has been selected as containment spray pump and its motor drive. Failure Mode and Criticality Effects analysis is applied to evaluate the failure modes while the logic tree diagram used to determine the optimum maintenance strategy. It is concluded that condition based maintenance tasks should be enhanced to reduce component degradation and thus improve reliability and availability of the component. It is recommended to apply time directed tasks to age related failures and failure finding tasks to hidden failures.

• 디자인학연구
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• 제17권2호
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• pp.77-86
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• 2004

사용자 중심 디자인(User-Centered Design)은 주어진 환경(Context)에서의 사용자 행동(Activity)을 모델링 하여 사용자가 기능적, 논리적으로 주어진 작업(Task)을 수행해 낼 수 있는 상품의 디자인을 가능케 하는데 크게 기여한 바 있다. 그러나 사용자 중심 디자인은 사용하기 편하고 유용한 측면을 디자인하는 데는 큰 기여를 했지만, 소비자의 감성 및 문화를 고려한 상품 디자인을 개발하는 측면에서는 아직 성공적인 사례를 제시하지 못했다는 비난을 받고 있는 것도 사실이다. 이는 사용자 중심 디자인이 사용자의 요구사항 (기능적인 요구 사항)에만 치중하는 접근법이기 때문으로, 사용 상황이 중요한 공공 시설물이나 기업 소프트웨어의 개발에는 적합하지만 소비자를 직접 대상으로 하는 디지털 컨텐트 및 디지털 가전의 디자인을 위해서는 부족한 면이 없지 않아 있는 것으로 발표되고 있다. Jordan은 이러한 문제법의 해결안을 제시하면서, 사용자 요구사항의 다차원적(개인적, 사회적, 인지적, 물리적) 접근법을 제안하였고, 그것을 Pleasure-based Approach라고 명명하였다. Jordan도 사용자 조사의 중요성은 부각하였지만, 사용자 조사의 결과를 상품 개발에 접목시키기 위한 방안은 제시하고 있지 못했다. 본 논문에서는 Kano의 상품 속성 모형을 도입하여 사용자 조사 방법과 상품 요소 도출과의 연결고리를 발견하고자 하였다. Kano 모델에서는 상품 요소를 크게 기본요소, 퍼포먼스요소, 엑셀런트 요소로 나누어 설명하고 있다. 퍼포먼스 요소는 설문조사와 같이 직접적으로 고객으로부터 얻을 수 있는 요소로 설명하고 있다. 그러나 기본요소 및 엑셀런트 요소는 직접적인 사용자 조사를 통해서 얻을 수 있는 요소가 아니라 고 주장하고 있고, 이런 요소들을 도출하기 위하여 경쟁상품분석, 참여적 소비자 조사 등과 같은 방법이 도입되어야 한다. 고 말하고 있다. 이에 본 연구에서는 '13-18 청소년용 온라인 커뮤니티 컨텐트 개발 프로젝트' 를 중심으로 엑셀런트 요소 및 퍼포먼스 요소를 도출하기 위한 참석 관찰의 프레임 워크를 제시하고, 그 결과를 기능적 요소, 감성적 요소로 정리하여 상품개발에 활용하도록 하였다. 본 연구의 의의는 상품개발에 사용자 조사의 필요성 및 활용도를 실질적인 프로젝트를 통하여 시도해 보았다는 데 있다고 할 수 있겠다.

• 사회복지연구
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• 제48권2호
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• pp.97-119
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• 2017

본 연구는 미국 자활 영역에서 아래로부터 위로의 '이용자중심(client-centered)' 접근을 통해 개발되어 사용 중인 '정서적 자활 성과 지표(Psychological Self-Sufficiency: PSS)'의 한국에의 적용 가능성을 탐색하기 위해, 한국 자활 프로그램 참여자를 대상으로 척도 타당성 검증을 실시한다. 자활사업은 전통적으로 '경제적 자활'에 초점을 두고 자활사업의 궁극적 목표인 경제적 성과에\만 집중함으로써, 자활사업 참여자의 정서적, 사회적 변화를 간과해왔다. 본 연구는 자활사업의 성과를 제고하기 위해서는 기존의 경제적 측면에서의 접근 뿐 아니라 정서적 측면에서의 접근 또한 필요함을 제안하며, 자활사업 참여자들의 정서적 변화에 초점을 둔 고용희망 척도(employment hope scale: EHS)의 타당도를 검증한다. 그 결과, 4차원 17문항으로 구성된 한국형 고용희망 척도의 타당성이 검증되었다. 본 연구는 정서적 자활 정도를 측정할 수 있는 성과지표로서 한국형 고용희망 척도의 활용가능성을 검증함으로써, 경제적 자활 성과 지표를 보완할 수 있는 보완적 과정 평가 도구로서의 적용 가능성을 제안한다.

• 유통과학연구
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• 제12권6호
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• pp.31-39
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• 2014

Purpose - Environmental issues, climatic changes, and greenhouse gases are problems to be solved at a global level. With an increased emphasis on the environmental and social responsibility of the management of companies, the manner in which companies approach quality-oriented culture and their individual sustainability management are being discussed as truly important issues to help them secure their competitiveness and growth strategies. This study proposes strategic directions to help manufacturers not only in expanding their competitive quality-oriented company culture but also in strengthening their sustainability management abilities. This study conducts a literature review and empirical research to examine how significantly the variables of a quality-oriented company culture, customer-centered management, and process-centered and supply chain management-centered cooperation affect sustainability management performance in relation to economic profitability, environmental integrity, and social responsibility. Research design, data, and methodology - To verify research models and hypotheses, the study examined 170 companies using a questionnaire survey conducted over six weeks, and involved the performance of data analysis on 146 samples. Questionnaire responses were calibrated based on a Likert scale. The study used the Smart PLS 2.0 program designed for PLS (partial least squares), an analysis instrument of SEM (structural equation modeling). The study then verified empirical research hypotheses working on reliability analysis, validity analysis, factorial analysis, and path analysis. Results - Among the nine hypotheses, four are accepted and the rest are rejected. A quality-oriented company culture focusing on customer-centered management significantly influenced the maintainability management performance of environmental integrity and social responsibility, while economic profitability was dismissed. A process-focused quality-oriented company culture was significantly concerned with economic profitability but not with environmental integrity or social responsibility. A supply-chain cooperative company culture had a significant effect on economic profitability but not on environmental integrity or social responsibility. Conclusion - This study proposes strategic directions to help manufacturers expand their competitive quality-oriented company culture as well as strengthen abilities with sustainability management. It conducts a literature review and empirical research to examine how significantly the variables of quality-oriented company culture, customer-centered management, and process-centered and supply chain management-centered cooperation affect sustainability management performance in relation to economic profitability, environmental integrity, and social responsibility. There are two main conclusions. First, companies should consider the need for social responsibility management and environmental transparent management-focused maintainability management as avenues to create new markets and business, thereby helping the companies secure a reputation for having a customer and process-centered quality-oriented company culture by creating shared values between supply chains and enabling win-win situations through cooperation. Second, we are marching towards a creative win-win era from a society of conflicts and ruptures. Companies should understand that social responsibility management and supply chain management (SCM)-focused cooperation are the foundations of sustainable development, as they try to improve their culture while pursuing both win-win relationships with interested parties and equity in various conflictive relations.

• 한국철도학회논문집
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• 제7권3호
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• pp.271-277
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• 2004

This paper is concerned with the reliability centered maintenance (RCM) of the Automated Guideway Transit (AGT) vehicle system. Korea Railroad Research Institute (KRRI) has developed the AGT vehicle system from 1999 to 2004. The provisions for a specific maintenance system including RAMS (reliability, availability, maintainability & safety) of AGT vehicle system is necessary for maintaining good operation conditions. RCM is a process used to determine what must be done to ensure that any system continues to do whatever its users want it to do in its present operating conditions. Therefore, we introduce RCM in details and describe how RCM should be applied to AGT vehicle system on Gyeong-San test line. Analyses to approach RCM to AGT vehicle system are demonstrated in the seven steps that contain each main task and detailed operating conditions.

• 한국정보처리학회논문지
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• 제2권5호
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• pp.721-732
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• 1995

IPSE(Integrated Project Support Environment) 도구는 언어 중심적이고, 개발방 법론에 근거한 툴셋 형태로 제공되는 현재의 CASE 도구들의 주요 기능들을 하나로 통 합하고자 하는 노력의 결과로 볼 수 있다. 프로세스 모델을 기반으로 한 IPSE 접근방 법이 통합 CASE 구현을 위한 효과적인 방법으로 여겨진다. PM-CASE(Process Model based CASE)도구는 새로운 프로세스 모델링 기법에 의해 프로세스를 표현한 다이아그 램을 작성하기 위한 시제품으로서, 프로세스내의 태스크 관련 속성들을 정의 하고 데 이터 베이스에 저장한다. 이들 속성들은 태스크 수행 중에 만들어진 산출물에 대한 정 보의 검색 및 태스크와 연관된 도구를 호출하는데 사용된다. 본 논문에서는 PSEE (Process centered Software Engineering Environments) 도구들을 비교 분석하고, PM- CASE 도구의 기본개념, 구조, 설계에 대한 기술을 통해 효과적인 소프트웨어 개발관리 를 지원하는 프로세스 모델 기반 CASE 도구의 구축방법을 제시한다.

• 한국문헌정보학회지
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• 제48권3호
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• pp.303-334
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• 2014

본 연구는 대학도서관 경영평가를 위한 표준지표 및 평가방법의 개발을 목표로, 다양한 이해관계자들의 의견 수집 및 합의를 통하여 평가체계 안을 제안하였다. 이를 위해 우선 대학도서관 평가의 목적과 요구조건을 살펴보고, 다수의 이해관계자의 의견에 기초하여, 심층면담, 설문조사, 포커스 그룹 등을 이용한 다단계 합의의 방법으로 평가지표를 추출하였으며, 이의 구성 및 배점체계 등을 개발하였다. 전반적 평가체계는 과정적 접근을 큰 틀로 하여, 내부적/기능적인 과정 범주와, 외부적/서비스중심적인 자원 및 결과 범주를 고려하였으며, 범주들 간의 중요도의 균형 속에서 조사 분석 결과의 항목별 중요성에 따라 배점체계를 구축하였다. 더불어 평가방법 및 연차별 평가개선 로드맵을 제시하였다. 평가체계의 개발을 통해 본 연구는 대학도서관 평가활동에 기여할 뿐 아니라 대학도서관의 성과요소 및 예측변인들에 대한 논의의 활성화에도 기여할 수 있기를 기대한다.

• 공학교육연구
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• 제21권4호
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• pp.10-19
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• 2018

This study introduces an engineering design class which is experimental in a sense that it is planned and implemented with three key concepts such as learner-centered education, living lab and community based learning. With the class run in being connected with one regional community in Seoul, it focuses on its educational effects acquired through the living lab-based approach. And this research investigates the student's experiences of when, what and how they learn in a learner-centered class. It shows that, rather than taking professor's one dimensional lectures in classroom, the students learn actively when they face with the problem in the field. Students have come to carry out engineering design from the perspective of stakeholders, not from the supplier or producer's perspective in the process of meeting with the problem in reality. Team based collaborative activities are crucial in the entire design process. More importantly, students' design products have been transformed into more useful and meaningful ones as stakeholders of the local community have participated into the students' works. However, we need to recognize that there are some important issues that need to be solved institutionally and systematically in order for such educations to spread. This study suggests several educational arrangements for those issues.

• 한국환경교육학회지:환경교육
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• 제21권4호
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• pp.94-110
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• 2008

Recently environmental problem becomes such a big issue all over the world that the necessity and importance of the environmental education in school has been simultaneously emphasized. While diverse methods for the environmental education have been researched, this paper, especially focused on a teaching-learning model called GBS (Goal-based scenario), aims to provide a new learner-centered approach for the environmental education. For this purpose, this paper first briefly presents two theoretical backgrounds of GBS (i.e., constructivism and Schank's dynamic memory theory), which is followed by specific and concrete strategies and methods of how to apply GBS in class for the teacher. GBS(Goal-Based Scenario) is a learner-centered model in which learners are presented with a reality-based scenario (or task or problem) and go through several stages of 'missions' to get to a final solution of the given scenario. GBS, while completely resonant with other constructivist learning models in terms of learner-centered approaches, is distinctive from others, when it supplies more specific, structured guides of learning, called 'missions', to the students throughout the whole learning process. In a words, GBS ought to be recognized as an unique learner-centered model compromising the contradictory concepts of 'learner control' and 'structure and specifics' in learning environments still without any damage of constructivist learning principles.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권2호
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• pp.1148-1161
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• 2017

The success of a business process management system stands or falls on the quality of the business processes. Many experiments therefore have been devoting considerable attention to the modeling and analysis of business processes in process-centered organizations. One of those experiments is to apply the probabilistic theories to the analytical evaluations of business process models in order to improve their qualities. In this paper, we excogitate a conceptual way of applying a probability theory of proportions into modeling business processes. There are three types of routing patterns such as sequential, disjunctive, conjunctive and iterative routing patterns in modeling business processes, into which the proportion theory is applicable. This paper focuses on applying the proportion theory to the disjunctive routing patterns, in particular, and formally named proportional information control net that is the formal representation of a corresponding business process model. In this paper, we propose a conceptual approach to discover a proportional information control net from the enactment event histories of the corresponding business process, and describe the details of a series of procedural frameworks and operational mechanisms formally and graphically supporting the proposed approach. We strongly believe that the conceptual approach with the proportional information control net ought to be very useful to improve the quality of business processes by adapting to the reengineering and redesigning the corresponding business processes.