• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2008년도 정기학술발표대회 논문집
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• pp.638-641
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• 2008

Design is an iterative, generative, and multidisciplinary process by its nature. Iteration is frequent in most of the engineering design and development projects including construction. Design iterations cause rework, and extra efforts are required to get the optimal sequence and to manage the projects. Contrary to simple design, isolation of the generative iterations in complex design systems is very difficult, but reduction in overall iterations is possible. Design depends upon the information flow within domain and also among various design disciplines and organizations. Therefore, it is suggested that managers should be aware about the crucial iterations causing rework and optimal sequence as well. In this way, managers can handle design parameters related to such iterations proactively. Numbers of techniques are available to reduce iterations for various kinds of engineering designs. In this paper, parameter based Design Structure Matrix (DSM) is chosen. To create this DSM, a survey was performed and then partitioned using a model. This paper provides an easy approach to those companies involved in or intend to be involved in "design and build projects."

• 한국추진공학회지
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• 제27권1호
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• pp.17-26
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• 2023

Star 형상을 갖는 추진제 그레인은 다양한 면적 선도가 가능하고, 제작이 용이하여 실제 고체 추진제 로켓에 유용하게 적용될 수 있다. 그러나, 설계와 관련한 형상 변수가 많고 연소 말기 슬리버가 존재하므로, 해석 비용이 저렴한 일반적인 단일 최적화 기법으로는 최적 설계가 성공하기 어렵다. 본 연구에서는 활용성과 설계 성공률을 높이기 위해 데이터베이스를 사용하여 star 그레인을 설계하는 기법을 제안하였다. 제안된 방법에서는 성능 변수를 정의하고, 데이터베이스를 구축한 후 요구조건을 만족하는 해를 탐색한다. 제안된 방법을 적용하여 다양한 종류의 연소 면적 선도를 갖는 star 그레인의 설계를 수행하고, 설계 방법의 타당성을 검증하였다.

• 교육녹색환경연구
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• 제12권3호
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• pp.50-57
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• 2013

The education of building services field at university is not enough, although the field has become to be very important in architectural engineering. This lack of education is one of the reason that the level of domestic building services field is lower than that in developed countries. Present conditions of related laws, fields of work after graduation and education at university in building services field have been studied, and education conditions have been investigated divided into four-year architectural engineering course and five-year architecture course. Though building services field has become more important at university education, the number of credits and professor of the field is still small than other fields of architectural engineering. More practical curriculums are necessary to meet the expectation of companies, and it will be one of the method to meet it that criteria of curriculum constitution is according to ABEEK(Accreditation Board for Engineering Education of Korea) in more architectural engineering department.

• 로봇학회논문지
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• 제18권1호
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• pp.99-109
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• 2023

In this paper, the cinch bag typed fruit harvesting gripper was proposed. This gripper is focused on preventing problems that we found from the related research and setting the breakthrough as a design condition according to the harvest failures of other related studies. The cover part is designed to overcome the surrounding obstacles of target fruits such as tomato, Korean melon, and sweet pepper. The measurement of maximum load showed that the well-grasped target object, such as a spherical object with 65 mm of diameter, is unable to slip in a range of 0 kg to 10 kg. The fact that the gripper allows from 4 cm to 6 cm of positional error was shown in the measurement of positional error tolerance. And the cover part of this gripper showed that the suggested gripper can grab a target object without being obstructed by leaves and stems. Finally, it was proved that the gripper satisfied the design conditions through the measurement of contacting force, which showed it is appropriate for grasping an actual fruit without damage.

• 산업공학
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• 제15권4호
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• pp.349-355
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• 2002

In order to build a new factory, we must have answers regarding the following questions; 1. what is to be produced? 2. how are the products to be produced? 3. how much of each product will be produced? The answers are related to product-design, process-design and capacity-design respectively and they are used for layout-design as the input data. Especially capacity design decision provides the information regarding the number of equipments required and the balance of the line. This paper introduces a case study on the capacity design for a new factory where the retainers of ball bearing are manufactured. A simulation model is developed with ARENA for analyzing the system considered. The major objectives of the study are evaluating the performance of the line which is originally suggested by the company, and finding out alternatives for improving the system. Number of WIP between the processes are also investigated because it affects the space planning of the layout.

• 한국CDE학회논문집
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• 제13권4호
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• pp.243-254
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• 2008

As modular production becoming increasingly widespread in globalized manufacturing industries, sub modules or parts of the final product are being provided by many suppliers. Some part suppliers design their own products for themselves. In some cases, part suppliers provide the same type of product to multiple OEM companies. Because all part suppliers and OEM companies typically cannot use the same CAD system, engineering change in the CAD model of one company cannot be directly propagated to related CAD models of other companies. Even if two companies use the same CAD system, it may be difficult to share their CAD model owing to corporate security policy. In this paper, a neutral reference model that consists of a neutral skeleton model and an external reference data model is proposed as a new medium for the sharing and propagation of engineering change information among collaborating companies.

• 산업공학
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• 제10권3호
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• pp.11-21
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• 1997

The communication between members who participate in the product development project has an effect on the project time, cost, and quality. This reason requires the engineering database which is the kernel of product information. This study focuses on data and process modeling for engineering database related to electronic consumer product. First, Through the definition of engineering database, the characteristics of engineering data, mainly product data are analyzed. Second, The object and class for engineering database are defined. This results of the study can be applied with engineering database design and workflow design of PDM. It also can be used as a reference model when the company develops product with suppliers.

• 산업경영시스템학회지
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• 제33권2호
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• pp.148-153
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• 2010

Nowadays, customers have increasing needs, so more and more enterprises are selling their products with additional services and or contents. The emergence of service added to the product leads to the emergence of the Product-Service Systems(PSS). Many researches related to PSS are mainly concerned with general PSS and PSS modeling, which can not readily assist manufactures of consumer products to implement and realize PSS solution. We have wondered whether customers can distinguish service functions from product functions. Through the case studies on Apple and Nintendo and the survey on the representative 5 IT products, we propose the design factors of products and services for PSS.

• International Journal of Internet, Broadcasting and Communication
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• 제13권1호
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• pp.180-186
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• 2021

In cloud computing service it is important to share the system resource among multiple instances according to user requirements. In particular, the issue of efficiently distributing I/O resources across multiple instances is paid attention due to the rise of emerging data-centric technologies such as big data and deep learning. However, it is difficult to evaluate the I/O resource distribution of a Linux container, which is one of the core technologies of cloud computing, since conventional I/O benchmarks does not support features related to container management. In this paper, we propose a new I/O performance benchmarking framework that can easily evaluate the resource distribution of Linux containers using existing I/O benchmarks by supporting container-related features and integrated user interface. According to the performance evaluation result with trace-replay benchmark, the proposed benchmark framework has induced negligible performance overhead while providing convenience in evaluating the I/O performance of multiple Linux containers.

• 한국건설관리학회논문집
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• 제3권1호
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• pp.97-106
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• 2002

설계단계에서 VE를 적용하면 커다란 효과를 볼 수 있음에도 불구하고 국내에서는 설계단계의 VE가 활성화되지 못하고 있다. 특히 적절한 VB수행에 대한 적절한 용역대가 산정 기준의 부재는 설계VE의 적극적 활용을 가로막는 주요원인이 되고 있다. 본 논문에서는 설계YE와 유사한 용역업무의 대가산정 현황과 국내외 설계YE 용역대가 산정현황을 분석하여 현재 YE 용역대가 산정의 주요한 문제점을 도출하고 개선방향을 제시하였다. 다음으로 VE 용역대가 산정방안과 수행결과에 따른 인센티브 지급 방안을 제시하였다 마지막으로 면담을 통해 제안된 방안의 유효성을 검증하였다.