• Journal of the Korea Institute of Information and Communication Engineering
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• v.26 no.10
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• pp.1545-1550
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• 2022

In this research, a method for minimizing the replacement time of AMR (Autonomous Mobile Robot), which is used in various industrial groups such as logistics and manufacturing, was studied in the event of a LiDAR failure. In this regard, a general LiDAR exchange process was defined and a new exchange process based on the newly designed jig, which is mounted on the AMR, for the quick change of LiDAR was proposed. The experiment is conducted using commercialized AMR which was developed for application in the factory of an automobile manufacturing company. It was confirmed that LiDAR can be replaced and aligned within 24 minutes when the new exchange process is employed, which is about 76% or more shorter than the general LiDAR exchange process. As a result, we can minimize AMR downtime and overall process delays by applying the proposed process.

• Korean Journal of Construction Engineering and Management
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• v.10 no.6
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• pp.13-27
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• 2009

Construction companies are trying to apply process management to their business to improve efficiency in business circumstance of high competition and globalization. Since 1990s, construction firms adopted process management to improve internal and external business structure based on process. It however has a few improvement functions. In addition, business support systems for business process efficiency improvement were developed, but separation between business process and IT system occurred because it focused on function-based individual construction and data input/output. To solve this problem, this study proposed business process and IT integration model for supporting user to use business information and system based on visualized business process and improving use of previous business support system. Business efficiency is expected to be improved with this model which based on integration required business condition(stakeholder, business data, functions of business supporting system). This study developved process model, architecture, and BPA of whole construction management business. According to BPA, it analyzed business process stakeholder, detail activities, and input-output data. And also it examined 12 main business supporting system of Korean construction firms. Based on analyzed data, this study developed business process supporting integration model based on business process through PDCA and CRUD analysis.

• 한국신재생에너지학회:학술대회논문집
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• 2010.06a
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• pp.208.2-208.2
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• 2010

폐기물 가스화는 생산된 합성가스를 이용하여 발전 등 직접적인 에너지원으로 이용할 수 있으며, 고부가가치 화합물의 원료 공급원으로도 이용할 수 있다. 폐기물 가스화를 이용한 고부가가치 화합물 제조의 경우 기존 화합물 제조공정에 폐기물 가스화 공정이 연계되어, 하나의 복합시스템으로 운영이 된다. 따라서 기존 공정과 최적으로 연계될 수 있는 폐기물 가스화 시스템의 개발 또는 선정이 필요하며, 이를 위하여 폐기물 가스화 시스템에 대한 분석 평가가 적절하게 이루어져야 한다. 본 연구에서는 시스템공학 개념을 적용하여 폐기물 가스화 시스템의 체계적인 분석 평가를 위한 프레임워크를 개발하였다. 시스템공학은 요건분석, 기능분석, 합성(통합), 분석/관리 프로세스를 통하여 시스템을 성공적으로 구현하기 위한 다학제적인 접근방법이다. 이러한 시스템공학의 개념 및 기본 프로세스를 적용 조정하여 폐기물 가스화 분석 평가 프레임워크를 개발하였으며, 개발된 프레임워크는 계층구조로 표현이 된다. 계층구조는 분석관점, 분석항목, 분석지표로 구성이 되며 분석된 데이터에 대한 평가는 AHP를 통하여 계산된 가중치를 적용하여 이루어진다.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.182-189
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• 2007

To reform and improve the productivity of construction industry, 1) it should be encouraged to improve the construction production process and 2) it is required to enhance reliability of construction information based on the systematic thinking process. To promote the information reliability created during construction production process, Lean Construction Research Center(LRC2) is developing a supporting system to improve design/material supply/schedule management, functioning to efficiently manage the information created at construction production processes and developing a web based construction information system that provides result management/decision making support/knowledge based information services.

• Journal of the Korean Society for Precision Engineering
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• v.18 no.9
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• pp.25-30
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• 2001

• Korean Journal of Construction Engineering and Management
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• v.2 no.4 s.8
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• pp.144-156
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• 2001

This study aims at improving the limitations of current construction processes. Previous solutions to improve construction processes have been focused on the improvement of local processes. This paper proposes a method to improve global effectiveness of construction processes through ascertainment of communication among the process participants. This paper provides two case studies: Deck plate installation processes and Duct installation processes. The case study illustrates a way to improve global effectiveness by incorporating downstream participants such as specialty contractors in upstream construction processes such as design and planning.

• Electronics and Telecommunications Trends
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• v.22 no.2 s.104
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• pp.92-101
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• 2007

Lean six sigma는 six sigma에 lean 개념을 접목시켜, 부가가치를 창출하지 못하는 프로세스 단계를 먼저 제거하여 프로세스 속도나 사이클 타임을 향상시키는 프로세스개선 방법론을 의미한다. Six sigma의 최우선 목표가 품질 개선이라면 lean은 생산 공정의 낭비제거에 초점이 맞춰져 있다. 그러나 quality와 함께 speed, cost를 고려하지 않는다면 프로세스의 속도나 투자자본의 감소를 개선하기 어려울 것이다. Lean six sigma는 lean의 속도와 six sigma의 무결점, 이 두 가지에 집중하여 원치 않는 복잡성을 제거하고 고객에게 집중하고 무결점 서비스를 제공하는 것이다. 본 연구에서는 우편물류에 lean six sigma를 적용한 프로세스 개선 방법론을 제시한다.

• Proceedings of the Korea Contents Association Conference
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• 2015.05a
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• pp.415-416
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• 2015

기존에 활용되고 있는 Flowchart와 프로세스를 설명하는데 활용되는 노드 모형을 선정하여 8종의 기본 노드를 구성하고, 이를 기반으로 생산 공정의 프로세스 모델링 방법론을 제시한다. 이는 사용자의 활용성과 모델링 툴의 경량화에 기여한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.10a
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• pp.302-304
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• 2012

수해양공간이라는 특수한 환경에서 이루어지는 플로팅 건축은 외부환경인자 증가 및 복잡한 공정으로 인한 정보전달 및 의사결정을 위한 협업이 중요하다. 협업 중심의 BIM기반 통합설계프로세스의 적용은 플로팅건축 설계를 효율적으로 진행하게 할 것이다.

• Membrane Journal
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• v.26 no.2
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• pp.152-158
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• 2016

The Chlor-alkali (CA) membrane cell is a major electrolysis system to produce valued chemicals such as chlorine gas and sodium hydroxide. The CA membrane process has been attracted in the industries, since it has relatively low energy consumption when compared with other CA processes. The key component in CA process is perfluorinated sulfonic acid ionomer membranes, which provide ion-selectivity and barrier properties to produced gases. Unfortunately, there is limited information to determine which factors should be satisfied for CA applications. In this study, the influences of PFSA membranes on CA performances are disclosed. They include ion transport behaviors, gas evolution capability, and chemical/electrochemical resistances under CA operation conditions.