• 상하수도학회지
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• 제37권6호
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• pp.447-456
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• 2023

Risk assessment on Jeju Special Self-Governing Province(JSSGP)'s water supply facilities and establishment of adaptation measures for climate crisis factors were implemented. JSSGP's vulnerability to the climate crisis was high in the order of drought, heat wave, heavy rain and strong wind. As a drought adaptation measure, policies of water saving and revenue water ratio improvement were considered. As for the heat wave adaptation measure, the introduction of an advanced water treatment process was suggested in response to the increase of algae cell number which resulting in taste and odor problem. As for heavy rain adaptation measures, the installation and operation of automatic coagulant injection devices for water purification plants that take turbid surface water were proposed. As a measure to adapt to strong winds, stabilization of power supply such as installation of dual power line was proposed in preparation for power outages. It is expected that water facilities will be able to supply high-quality tap water to customers even under extreme climate conditions without interruption through risk assessment for climate crisis factors and active implementation of adaptation measures.

• 융합정보논문지
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• 제12권5호
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• pp.107-115
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• 2022

본 연구는 공급사슬 취약성의 동인과 내·외부 분열적 상황을 규명하고 공급사슬 위험관리가 성과 피해를 완화하는 조절효과를 검증하는 것을 목적으로 한다. 182개 중소기업을 대상으로 한 분석결과는 다음과 같다. 첫째, 공급사슬 취약성은 글로벌화, 제품 다양화 등 기업의 과도한 효율성에서 비롯되었음을 확인하였다. 둘째, 외부 환경적 분열요인보다 내부요인의 발생 가능성과 심각성이 더욱 높게 나타났다. 특히, 기업 내부의 가치사슬보다는 기업 간 공급사슬 프로세스에서 발생하는 위험의 대응 우선순위가 높았다. 마지막으로 공급사슬 위험관리의 수준이 높을수록 성과 피해를 긍정적으로 완화하는 조절효과가 나타났다. 본 연구는 공급사슬 위험에 대응하는 기업실무자와 정책 입안자의 의사결정에 실행적 단서를 제공하는 것에 가치가 있다.

• 한국재난정보학회 논문집
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• 제16권4호
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• pp.784-795
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• 2020

연구목적: 본 연구는 기업재난관리표준에 규정하고 있는 위험평가 절차에 대하여 연구하고자 한다. 연구방법: 기업재난관리표준에 정하고 있는 위험평가 단계별 요구사항을 파악하고, 'A'기관과 협력사의 적용사례를 검토하였으며 요구사항에 맞는 위험평가 절차를 도출하였다. 연구결과:기업재난관리표준의 요구사항인 위험 시나리오 도출 방법과 절차에 대하여 명확히 정의하고, 위험 시나리오 도출을 위한 표준화된 절차 도입이 필요한 것으로 검토되었다. 결론:발전 연료수급업무에 대하여 시스템 이론에 기반한 STPA 기법을 적용하여 위험 시나리오를 도출하는 방법을 구현하였으며, 모든분야의 핵심업무에 대한 위험 시나리오 도출에 적용할 수 있도록, STPA 기법을 재해경감활동계획 수립을 위한 위험 시나리오 도출 기법으로 기업재난관리표준에 반영할 것을 제시하였다.

• 한국수소및신에너지학회논문집
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• 제32권5호
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• pp.299-307
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• 2021

In order to expand the supply of hydrogen vehicles, the first thing to be done is to build an infrastructure to supply hydrogen. There are fixed and mobile types of hydrogen refueling stations that can supply hydrogen. Mobile hydrogen refueling stations have the advantage of supplying hydrogen to two or three areas, so the introduction of mobile hydrogen refueling stations is considered at the initial stage of hydrogen vehicle dissemination. However, mobile hydrogen refueling stations have greater risks than fixed hydrogen refueling stations due to the hazard associated with movement and intensive installation of facilities in vehicle, so stricter design standards to lower the risk must be applied. Therefore, in this study, basic data for establishing safety standards for mobile hydrogen refueling stations were proposed by suggesting improvements such as the location of emergency shutoff valves, the number of gas detectors etc., using HAZOP analysis.

• The Journal of Asian Finance, Economics and Business
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• 제3권3호
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• pp.57-65
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• 2016

The purpose of this paper is to investigate the volatility of both Islamic and conventional stock market in Indonesia with the aim of identifying the most appropriate model for risk management practice. The study considers GARCH as a genre of model to measure the volatility of stock market movement. The results support the view that each model shows specific volatility from both Islamic and conventional stock market in Indonesia. In Islamic stock market, volatility is affected by exchange rate and money supply (M1) but not interest rate as interest is prohibited in Islam. However, interest rate is found as a principal factor that affects volatility of conventional stock market. The outcomes of this paper are of particular significance to policy makers, as it provides guidelines to maintain economic health. Furthermore, the findings may assist practitioners to understand the consequences of macroeconomic factors such as exchange rate, money supply and interest rate, which are very crucial for the market stability of Indonesian stock market. The paper enhances the understanding of stock market volatility and proposes guidelines risk management practices.

• 환경영향평가
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• 제18권6호
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• pp.367-376
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• 2009

This paper proposes an application methodology of AHP(Analytic Hierarchy Process) based decision making theory for improvement priority by assessment of various risk factors affecting on deterioration of water supply systems, as major social infrastructure. AHP method is organized with three level of hierarchy which is introduced for multi-criteria decision making in this study. In the first level, assessment outputs are calculated by AHP for each affecting factor. In the second level, criteria are estimated by using assessment results with respect to structural and environmental factors. Consequently, ranking decision is performed in the third level. In order to present the effectiveness, a proposed method is compared with FCP(Fuzzy Composite Programming) for decision making. Since the results of the proposed method show better performance with consistent results, it can be applied as an efficient information for the determination for improvement priority of the study infrastructure.

• Journal of Contemporary Eastern Asia
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• 제20권2호
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• pp.237-258
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• 2021

The COVID-19 pandemic has highlighted the risks of an over-concentration of supply chains in one country. It has motivated stakeholders to pursue diversification strategies. However, a paradox exists. Stakeholders have shied away from a complete decoupling and preferring to selectively enhance economic ties with China. This article explores this paradox by examining supply chain concentration in China as a form of asymmetric interdependence and the countermeasures from the U.S., Japan, Australia, and India to minimize vulnerabilities. It argues that while the COVID-19 disruptions have brought to light the risk of supply chain overconcentration in China, countermeasures are also driven by coercive diplomacy and the deepening U.S.-China rivalry. The paper also examines the feasibility of diversification efforts by focusing on the capacity and capabilities of alternative supply chain hubs. It finds that while states are actively seeking ways to prevent China from using asymmetric interdependence of supply chains and trade to gain political leverage, there are structural limits to the degree of diversification in the short to mid-term.

• 한국건축시공학회지
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• 제9권5호
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• pp.87-93
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• 2009

건설공급사슬은 시공사와 협력업체의 협력을 위해 많은 정보들이 원활하게 전달되고 공유되어야 하기 때문에 참여주체 간 정보공유 및 교류가 가능한 통합된 정보시스템의 구축이 필수적이다. 건설산업에서도 최근 제조 분야를 중심으로 부상하고 있는 기업 내 업무프로세스 개선, 참여주체 중심의 경영, 공급사슬을 하나의 시스템으로 관리하는 공급사슬관리 방식을 적용할 필요가 있다. 본 연구에서는 공급사슬의 중요한 부분을 차지하는 자재를 중심으로 공급사슬관리를 지원하는 시스템을 제안하였다. 건설공사는 공정관리를 중심으로 관리되므로 공급사슬관리도 공정관리과 연계하여 이루어져야 한다. 이를 위하여 공정관리 프로그램에서 자재를 관리하고 공급사슬과 관련된 참여주체가 쉽게 활용할 수 있는 방법을 제안하였다. 또한, 건설현장에서 건설공급사슬관리를 위해 지원시스템을 제안하고 프로토타입을 구현하였다. 프로토타입은 공정관리 프로그램인 Microsoft Project에서 VBA로 프로그래밍하였고, @Risk for Project를 이용하여 시뮬레이션하는 과정을 제시하였다.

• 한국안전학회지
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• 제33권5호
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• pp.141-149
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• 2018

In a PCB factory, there is a corrosive chemical substance supply system that can causes major leakage accidents. These accidents can give rise to shut down the factory and do residents damage that cause enormous loss of properties. To mitigate these risks, it is necessary to provide a chemical disaster prevention system. Moreover, after considering the situation and environment of the production site, it is of great importance to build an optimal chemical accident prevention system by reflecting risk reduction measures from the point of process design and by assessing quantitative risk based on reliability data. However, because there was no established database of the reliability about facilities and equipment that can be used in the domestic, the business site and consulting organization had being used the reliability data such as USA CCPS(Center for Chemical Process Safety). In these days, Korean institutes are studying on reliability data utilization method of quantitative risk assessment for preventing chemical accidents and domestic utilization algorithms and storage bed of reliability data. This study presents samples of reliability database about the chemical substance supply system that constructed from the history data such as failure, maintenance for 10 years at a PCB factory. Also, this work proposes the safety design criteria for supply facilities of corrosive chemical substance by assessing quantitative risk on the basis of the reliability data.

• 에너지공학
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• 제27권2호
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• pp.1-13
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• 2018

미세먼지 저감 및 에너지원 변환에 대한 정책 추진에 따라 천연가스를 연료로 하는 발전의 비중이 확대되고 있다. 복합화력발전 플랜트, 열병합발전 플랜트 등에서 천연가스 연료공급계통이 가스가 가열된 상태에서 고압으로 운용되고 있으므로, 누출사고를 예방하여 화재 및 폭발에 의해 사고를 방지하여야 한다. 본 연구에서는 API RP 581 RBI 코드를 기반으로 복합화력발전 플랜트의 천연가스 연료공급계통을 대상으로 위험도 평가를 수행하였다. API RBI 코드의 적용을 위해 평가 대상 계통의 라인 및 세그먼트를 구분하였다. 파손확률과 파손피해 산출을 위해 운전 데이터 및 입력 정보를 분석하였다. 설치 초기 시점 및 운전시간 경과에 따른 위험도 평가 결과 추이를 분석하였다. 코드 기반 평가 시 가스연료 공급계통은 두께 감육, 외부 손상, 기계적 피로 손상기구의 영향이 주로 반영되었다. 운전 시간이 경과함에 따라 단열재 하부 부식(CUI, Corrosion Under Insulation) 등에 의한 외부손상이 위험도를 상승시키는 원인으로 예상되었다.