• 한국CDE학회논문집
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• 제3권4호
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• pp.251-259
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• 1998

Currently a hot potato in industries is to reduce the lifecycle of product and maximize the time-to-market benefits. A lot of methodologies and the concrete systems are in use for performing this function. One of these systems is that process are reconstructed by BPR and systems are implemented by PDM. First of all, th analyses of existing product, process and resource data must be preceded. New process is established on the basis of the analyzed information of a company and PDM implements the new process in the company. The consecutive activities like this provide the basic environment for CIM. However, the current system have been developed on the favor of a big company. There are many problems in applying it too a mid-sized company. A lot of function in a PDM tool is not necessary for the mid-sized CIM characteristic. The purpose of this study is to define the ROPP information model that is an appropriate information integration for a design process. The model shows an associated complicated information of a company effectively. Also the modeler makes it possible to manage consistently the constraints of design process on the basis of the analysis of dependency among each resource.

• 한국CDE학회논문집
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• 제4권3호
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• pp.238-246
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• 1999

The modeling method to support product development processes (PDP) must have certain characteristics including the ability to represent multiple viewpoints of the product development and integrate with currently available analysis and design methods based on CE concept. This paper describes the reference model to support multiple viewpoints (PPO: Products, Processes, and Organizations/Resources viewpoints) of the product development processes, from which each model (Products model, Processes model, and Organizations/Resources model) can be extracted, as well as produces PPO data schema. This reference model has associative relationships among the products, processes, and organizations/resources. To allow the extensibility to support design evolution, we propose structured dat representation methods using semantic network, which can be constructed through first-order logic. The product development processes is so represented by specifying entities and semantic relationships among them hat he appropriate information can be accessed and all of the relevant attributes about the entities can be retrieved simultaneously.

• 한국정밀공학회지
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• 제20권6호
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• pp.151-159
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• 2003

This paper presents a new DFA methodology to estimate the standard assembly time and evaluate the assemblablity of a product. The assembly time is estimated with some decision and influencing factors of assembly using motion analysis. The assemblability is evaluated using weights of the decision and influencing factors and assembly difficulty scores, and the tables that include the time and score of assembly are suggested. Finally, a new DFA system supporting the DFA is implemented to help designers to analyze the product during the design process in concurrent engineering.

• 한국군사과학기술학회지
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• 제2권1호
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• pp.38-60
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• 1999

The main objective of this study is systemization of the technique of ROC quantification and optimization of baseline design by applying CE principle to the acquisition process of a weapon system. QFD and TOA techniques can be employed to a good working example of the conceptual design of a future main battle tank. In this paper, Product Planning Phase, the first phase of four QFD phases, is deployed in terms of eight steps including customer requirements and final product control characteristics. TOA is carried out considering only combat weight. In order to perform combat weight analysis and performance TOA, Preliminary Configuration Synthesis Methodology is used. Preliminary Configuration Synthesis Methodology employs the method of least squares and described linear equations of weight interrelation equation for each component of tank. As a result of QFD based upon the ROC, it was cleared that armor piercing power, main armament, type of ammunition, cruising range, combat weight, armor protection, power loading, threat detection and cost are primary factors influencing design and that combat weight is the most dominant one. The results of TOA based on the combat weight constraint show that 5100 lb reduction was required to satisfy the ROC. The baseline design of a future main battle tank is illustrated with assumption that all phases of QFD are employed to development and production process of subsystems, components, and parts of main battle tank. TOA is applied in iterative process between initial baseline design and ROC. The detailed design of each component is illustrated for a future main battle tank.

• 대한기계학회논문집
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• 제15권6호
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• pp.1933-1947
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• 1991

본 연구에서는 특징형상기반 CAD 시스템의 기계가공을 고려한 기하학적 모델 링 기능과 부형상의 합성과 해석을 위한 사출성형에 관한 광범위한 지식을 연계, 종합 한 형태의 지식형 CAD 시스템을 제안하였다.

• 대한산업공학회지
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• 제21권3호
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• pp.441-461
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• 1995

This research proposes an Integrated Product Information Model (IPIM) using STEP (Standard for the Exchange of product model data) for Computer Integrated Manufacturing (CIM) of Concurrent Engineering (CE). IPIM is based on Geometry and Topology (STEP Part 42), Form Feature (STEP Part 48), and Tolerance (STEP Part 48) for representing the integrated information of mechanical parts. For the IPIM, 1) new entities are developed for integration of existing entities, and 2) the existing entities are restructured and modified for a special application protocol. In CIM or CE, the advantages of using IPIM having integrated form of geometry, feature and tolerance are 1) integration of product design, process design and manufacturing sequentially or concurrently. 2) keep the product data consistency, modified by different domain, and 3) automatic data exchange between different application software and different hardware. The prototype system is composed of CAD, Data Probe, DBMS and SDAI (Standard Data Access Interface), and the generated STEP data is stored in a step file of DBMS for other applications.

• ETRI Journal
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• 제22권3호
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• pp.27-40
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• 2000

Recently, advanced information technologies have opened new possibilities for collaborative designs. In this paper, a web-enabled collaborative design environment is proposed, where the product data based on STandard for the Exchange of Product model data (STEP) is managed in a hierarchical database and the product metadata is used to efficiently search and utilize information scattered over the network. Several integrity constraints are depicted using EXPRESS to validate the combination of data from different sources. The knowledge represented as metadata and constraints on the interacting features differentiate this environment from previous ones. The collaborative conferencing system is also introduced to communicate and collaborate simultaneously among the related designed. As a result, the proposed environment allows the distributed designers to more efficiently obtain, exchange and communicate the design information throughout the design process.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2008년도 춘계종합학술대회 A
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• pp.632-635
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• 2008

최근 들어 공장자동화분야에 동시공학이라는 개념이 활용되고 있다. 본 논문에서는 판재를 절단하여 철의장 부품을 생산하는 작업 현장이 회사 내 외의 협업이 요구되는 환경임에도 불구하고, 분산화 된 동시공학적 생산개념이 적용된 사례가 없어 이와 관련된 연구를 수행하였다. 클라이언트/서버 환경의 철의장 부재생산 자동화시스템을 설계하고, 부재 절단에 필요한 NC포스트프로세서 구축기를 설계하였다. 또한 부재생산 전 공정을 동시공학적 분산처리를 수행했을 때 기존의 생산공정에 비해 제품생산에 소요되는 시간이 단축됨을 보였다.

• 디자인학연구
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• 제18권4호
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• pp.95-104
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• 2005

본 연구의 분석목표는 제품 디자인의 결정요인을 추정하고 품질경쟁력, 제품 신뢰성, 고객충성에 대한 제품 디자인의 파급효과를 실증적으로 분석함으로써 디자인 경영이론에 유용한 시사점을 도출하는 것이다. 상기한 실증적 분석을 위하여, 한국 제조업 부문의 400개 표본기업에 대한 설문조사(2003년 8월${\sim}$10월)를 통하여 관련 측정변수들을 추출하였다. 본 연구의 분석결과는 다음과 같다. 첫째, 제품 디자인의 유의적 결정요인은 연구개발력 수준, 연구개발투자 수준, 혁신활동 수준(5S, TQM, 6Sigma 운동, QC 등)으로 추정되었다. 이 분석결과는 제품 디자인과 제품 개발을 동시적 엔지니어링(CE: concurrent engineering) 개념으로 파악하고 이들의 성과를 평가하기 위한 시스템관련 원리(system-related principle)와 행렬관련 원리(matrix-related principle)로써 서술한 Pawar and Driva(1999)를 실증적으로 뒷받침한다. 둘째, 제품 디자인의 파급효과는 제품 디자인${\rightarrow}$품질경쟁력${\rightarrow}$고객만족${\rightarrow}$고객충성의 인과관계로 나타나는 것으로 추정되었다. 즉, 제품 디자인은 고객만족을 직접적으로 유발하는 것이 아니라 품질경쟁력을 경유하여 간접적으로 고객만족을 유도한다는 것이다. 이 분석결과는 디자인 경영이 통합된 제품 품질의 중요한 결정인자라고 분석한 Flynn et al(1994), Ahire et al.(1996), Ahire and Dreyfus(2000) 등을 실증적으로 뒷받침한다. 일반적으로 제품 디자인의 접근방법으로써 3가지 즉 (1) 제품 개발자(엔지니어, 기술개발담당자, 품질관리팀)를 중심으로 하는 QFD(quality function development)의 접근방법, (2) 마케팅 담당자를 중심으로 하는 컨조인트 분석(conjoint analysis), (3) 상기의 2가지 접근방법의 상호보완적 및 동시적 결합 및 피드백의 주장(Pullman, Moore and Wardell, 2002)을 들 수 있다. 그러나 본 연구의 실증적 분석결과에는 품질경쟁력이 제품 디자인과 고객만족사이에 교량적 역할을 담당한다. 이 분석결과는 제품 디자인에 대한 품질경쟁력의 2가지 접근방법(QFD의 접근방법과 컨조인트 분석)의 조화를 이룰 수 있는 이론적 기초가 될 수 있다. 즉, 제품디자인의 결정요인 분석결과는 QFD의 접근방법에, 제품 디자인 파급효과 분석결과는 컨조인트 분석에 각각 보완적 기여를 할 수 있다. 이와 동시에, 실증적 분석결과는 Ettlie(1997)의 디자인 통합(DI) 이론에 대한 실증적 기반을 제공할 수 있다. 마지막으로, 성공적인 디자인 경영(DM)을 위해서는 최고 경영자의 지원뿐만 아니라 부처 간 의사소통의 장애요인을 제거하고 CFT(cross-functional team)를 운영함으로써 동시적 엔지니어링(CE) 및 제품 및 공정 디자인의 개발이 제품 개발의 속도를 가속화하고 디자인 품질을 높이며 시장 성공을 보증할 수 있도록 해야 한다.

• 한국전자거래학회:학술대회논문집
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• 한국전자거래학회 1999년도 학술대회지 vol.1
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• pp.277-299
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• 1999

Since Chrysler Motor Co. had experienced the digital development system in the beginning of 1990's, most of leading automobile companies are trying to apply a digital information system for their own business process reengineering based upon concurrent engineering system from product planning phase. This is called as virtual DMU(Digital Mock-Up) system instead of the traditional PMU(Physical Mock-Up) system. By using the virtual prototype, all of the design requirements and system specifications can be checked, changed and optimized more quickly and more efficiently. This paper consists of five chapters for the DMU information system. In the 1$^{st}$ chapter, the principle of digital design system is suggested by using four basic modules such as product design module, process design module, manufacturing system design module and central control module. The basic scheme of DMU is introduced with the benefits of application in the chapter 2. In the chapter 3, a digital design process of new car development is explained with the detailed DMU design and design review processes. In the chapter 4, the practical DMU manufacturing techniques and applications are introduced as CAD/CAM analyses, DPA(Digital Pre-Assembly)reviews for development, production, operation and maintenance phases, digital tolerance analyses and digital factory analyses for assembling line simulation, automated robot welding processes, production jig ＆ fixtures and painting process simulation. Finally, the activities of digital design support; CAS-styling, CAE-engineering and CAT-testing are summarized for design optimization in the chapter 5. As today's automobile manufactures and related business organizations are struggling to compete in the global marketplace, they are concentrating on efficient use of DMU information system to reduce the new car development cost, to have shorten the delivery schedule and to improve product design quality. To meet the demand of those automobile industries on digital information systems, the CALS(Computer aided Acquisition and Logistics Support) and EC(Electronic Commerce)initiative has been focused as a dominant philosophy in defense ＆ commercial industries, specially automobile industries.s.