• 디자인학연구
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• 제18권4호
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• pp.155-164
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• 2005

가구디자인의 분야는 다른 제품디자인 분야와 다르게 순수 디자인영역과 함께 스튜디오작업을 병행하는 경우가 많다. 이러한 경우는 대량 생산하는 산업가구보다는 다품종 소량생산이나 맞춤형 주문가구, 혹은 부가가치를 극대화한 작품가구 등을 들 수 있으며, 이러한 작업은 주로 소규모의 공방에서 이루어진다. 이와 같은 소규모 가구 스튜디오에서의 디자인과 제작은 대량생산에 비해 형태와 조형성애서 비교적 자유로울 수 있으며 그에 대한 대표적 조형의 요소는 '곡선'이라고 볼 수 있다. 나무는 그 재료적 특성 상 원목의 곡선 카빙을 제외한 자유로운 곡선의 조형이 까다롭기 때문에 특별한 벤딩기법을 적용해야하는데 이를 위해서 본 연구에서는 베큠프레스의 벤딩기법의 효용성과 가능성을 연구하였다. 베큠프레스의 특징과 다양한 기능분석 및 이를 바탕으로 한 기법개발과 실험을 통해서, 특히 가구디자이너를 위한 소규모 스튜디오에서의 베큠프레스의 효율성과 생산성의 가치를 파악하고 보다 효과적인 벤딩의 작업성을 위해 적절한 충족조건 등을 찾아내고자 하였다.

• 산업경영시스템학회지
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• 제38권3호
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• pp.78-86
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• 2015

Up-to-date business environment for manufacturers is very complex and rapidly changing. In other words, companies are facing a variety of changes, such as diversifying customer requirements, shortening product life cycles, and switching to small quantity batch production. In this situation, the companies are introducing the concept of JIT (just-in-time) to solve the problem of on-time production and on-time delivery for survival. Though many companies have introduced ERP (enterprise resource planning) systems and MRP (material requirement planning) systems, the performance of these systems seems to fall short of expectations. In this paper, the case study on introducing an APS (advanced planning and scheduling) system based on dispatching rules to a machining company and on finding a method to establish an efficient production schedule is presented. The case company has trouble creating an effective production plan and schedule, even though it is equipped with an MRP-based ERP system. The APS system is applied to CNC (computer numerical control) machines, which are key machines of the case company. The overall progress of this research is as follows. First, we collect and analyze the master data on individual products and processes of the case company in order to build a production scheduling model. Second, we perform a pre-allocation simulation based on dispatching rules in order to calculate the priority of each order. Third, we perform a set of production simulations applying the priority value in order to evaluate production lead time and tardiness of pre-defined dispatching rules. Finally, we select the optimal dispatching rule suitable for work situation of the case company. As a result, an improved production schedule leads to an increase in production and reduced production lead time.

• 한국의류학회지
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• 제38권2호
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• pp.175-190
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• 2014

This study analyzes the business strategy of fast fashion through Zara, a successful fashion brand from Inditex Spain. An in-depth case approach is adopted based on extensive secondary research that includes literature and press releases published in Korean as well as English. The findings of this research demonstrate a speedy and flexible process occurring in the supply chain of its fast fashion business and the cooperation between the company's headquarters and international subsidiaries. Zara's headquarters executes four representative strategies: competitive market research, an integrated organizational structure, small quantity batch production, and a specialized distribution system. Zara's international subsidiaries execute their own four representative strategies: differentiated international expansion, independent human resource management, small but fundamental IT, and maximization of store resources. These two core parts intimately work together to satisfy target customers all over the world by bringing competitive advantages to the fashion business and represent a key concept of Zara's business strategy. The main drawbacks of case studies are limited validity and representativeness restraining the potential for making generalizations. However this case is considered sufficient to provide valuable insight and improve the understanding of operation strategy in fast fashion.

• 한국정밀공학회지
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• 제30권1호
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• pp.96-104
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• 2013

Study of human-robot Interaction gets more and more attention to expand the robot application for tasks difficult by robot alone. Developed countries are preparing for a new market by introducing the concept of 'Co-Robot' model of human-robot Interaction. Our research of direct teaching is a way to instruct robot's trajectory by human's handling of its end device. This method is more intuitive than other existing methods. The benefit of this approach includes easy and fast teaching even by non-professional workers. And it can enhance utilization of robots in small and medium-sized enterprises for small quantity batch production. In this study, we developed the algorithms for creating accurate trajectory from repeated inaccurate direct teaching and GUI for the direct teaching. We also propose the basic framework for direct teaching.

• 대한안전경영과학회지
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• 제19권1호
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• pp.203-210
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• 2017

Companies are pursuing the management of small quantity batch production or JIT(Just-in-time) system for improving the delivery response and LOB(Line Balancing) in order to satisfy consumers' increasing demands in the current global economic recession. And in order to improve the growth of production for reducing manufacturing cost, improvements of the Load Balancing have become an important reformation factor. Thus this paper is aimed at warehouse which procures materials on the assembly line in procurement logistics of automotive logistics and proceed with research on heuristic algorithm development which can increase the Load Balancing of workers. As a result of this study, when applied the primary target value, it was verified that the whole workers decreased from 28 to 24. Furthermore, when specified the secondary target value and applied algorithm once more, it was verified that the Load Balance Ratio was improved from 44.96% to 91.7%.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2005년도 춘계학술대회 논문집
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• pp.249-252
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• 2005

Recently, as the industrial demand for small quantity batch production of sheet metal components, the application of dieless forming technology to production of these component rise with the advantages of the reduction in manufacturing cost and time. In dieless forming processes, the determination of moving path of tool plays an important role in producing successfully formed parts. In order to obtain the optimized moving path of tool avoiding forming failure, it is necessary to examine the forming limit of sheet material. Therefore, in this study, as the new criterion to evaluate the formability of sheet material in dieless forming processes FDD(feeding depth diagram) with respect to feeding depth and punch diameter is proposed. Thus, the FDD for the sheet materials of STS304 and Ti-grade2 were obtained from a series of FDT(feeding depth test). In addition the possibility of the application of FLD in judging forming severity in dieless forming processes was investigated by comparing the results of FE analyses based on FLD and experimental FDT.

• 한국융합학회논문지
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• 제11권11호
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• pp.211-217
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• 2020

일반적으로 금형은 소재 부품 분야에서 제품의 대량 생산에 널리 이용되는 중요한 생산 도구이다. 그러나 최근 다품종 소량생산의 확산에 따라 보다 효율적이고 경제적인 금형에 대한 요구가 증가하고 있으며, 본 연구에서는 금형 재료로서 초고강도 콘크리트의 적용 가능성을 모색해 보고자 한다. 초고강도 콘크리트는 80MPa 이상의 압축강도를 갖는 콘크리트로서 금속에 비해 저렴하고 무게가 가벼우며 조형이 용이하다는 장점을 가지고 있다. 초고강도 콘크리트가 비록 일반 금형 재료인 공구강에 비해 강도는 낮지만 상대적으로 낮은 응력이 발생하는 성형 공정에 사용된다면 금형 재료로서 충분히 활용 가능하다고 판단하였다. 따라서 본 연구에서는 플라스틱 저압 생산공정의 하나인 폴리우레탄 반응사출 성형공정용 시작 금형에 초고강도 콘크리트를 적용해 보았으며, 금형 제작 및 성형 과정을 통하여 금형 소재로서의 가능성과 특징을 고찰해 보았다.

• 융합정보논문지
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• 제12권4호
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• pp.328-337
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• 2022

COVID-19에 따른 온라인 마케팅의 활성화는 디지털 트랜스포메이션 가속화를 촉진하고 있다. 본 연구는 디지털 트랜스포메이션 역량이 부족하고 COVID-19로 수입 감소를 겪고 있는 중소 베이커리 기업의 10년간 매출 데이터로 Apriori 알고리즘을 사용하여 연관규칙분석을 수행했다. 분석 결과 오프라인 마켓 중심에서 온·오프라인 B2B, B2C 시장으로 전환하고, 다품종 소량 판매에서 소품종 대량판매 전략을 취하는 것이 경영 개선을 할 수 있는 것으로 나타났다. 향후 다각화된 마케팅 전략에 따른 다양한 채널의 판매 데이터를 분석하고 학습하면 많은 중소기업의 디지털 전략 대응을 위한 가이드라인이 될 수 있을 것이다.

• Journal of Platform Technology
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• 제8권2호
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• pp.32-43
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• 2020

무인 항공기 시스템은 주로 군사용 위주로 운용되어 왔으나, 민간 분야에서도 활발히 이용되고 있다. 민간 분야에서는 주로 저비용의 소형 무인 항공기 시스템을 이용하여 다양한 산업분야에서 이용되고 있다. 이러한 무인 항공기 시스템에서 운용되는 소프트웨어는 공통적인 기능들이 많이 존재한다. 하지만 이러한 특성에도 불구하고 하드웨어 장치가 변경되면 소프트웨어를 수정해야 하는 문제가 발생할 수 있다. 이러한 문제는 무인 항공기 시스템에서 상호 운용성, 모듈성, 이식성을 저하시킨다. 상기 문제들을 해결하기 위해 개방형 시스템 아키텍처가 제안되었으며, 본 논문에서는 다양한 개방형 시스템 아키텍처들 중 FACE(Future Airborne Capability Environment)를 기반으로 동작하는 무인 항공기 시스템 소프트웨어 구조를 제안한다. 본 논문에서 제안하는 소형 무인항공기 시스템은 소량 다품종으로 공급되는 민간 분야에서 다양한 플랫폼의 무인 항공기 시스템을 지원할 수 있으며, 소프트웨어에 대한 통합과 이식성이 뛰어난 장점을 가진다. 마지막으로 본 논문에서는 공개된 개발도구를 기반으로 하는 FACE 기반 무인 항공기 시스템 소프트웨어 개발 방법과 적합성 테스트에 대해 서술한다.

• 산업경영시스템학회지
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• 제41권1호
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• pp.59-69
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• 2018

The up-to-date business environment for Korean manufacturers is very complex and rapidly changing. Especially, the companies have faced with various changes derived from small quantity batch production, diversification of customer demands, and short life cycles of products. Consequently, the Korean manufacturing companies are in need of more efficient production planning and scheduling techniques. In this paper, the research trend of scheduling techniques is investigated to provide relevant information to researchers in this field. Furthermore, some implications for future researches are presented regarding literatures published in Korea over the last 10 years. This paper presents an entire investigation into Korean research works on scheduling (2,569 papers) that are published from 2007 to 2016. Especially, detailed analysis was carried out in the following three industry : 1) semiconductor, 2) shipbuilding and 3) automobile. In this paper, approaches to scheduling presented in the literature are categorized into the following three categories : 1) application, 2) algorithm, and 3) simulation modeling. First, in the semiconductor industry, scheduling techniques related to semiconductor cleaning processes, photolithography processes, chemical processes, transport and transport equipment have been found to be dominant. Second, the shipbuilding industry is focused on assembly processes, transporter, crane and various existing production management system. On the other hand, the scheduling research of the automobile industry is mainly focused on the vehicle movement routing and procurement supply-chain planning algorithm in terms of logistics. The conclusion of this study are expected to provide many implications for various types of academic and practical follow-up studies related to scheduling in consideration of main characteristics of semiconductor, shipbuilding and automobile industries.