• Nuclear Engineering and Technology
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• 제47권3호
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• pp.362-379
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• 2015

In this study, Nuclear Power Plant (NPP) construction schedule delay risk assessment methodology is developed and the construction delay risk is assessed for turnkey international NPP projects. Three levels of delay factors were selected through literature review and discussions with nuclear industry experts. A questionnaire survey was conducted on the basis of an analytic hierarchy process (AHP) and Relative Importance Index (RII) methods and the schedule delay risk is assessed qualitatively and quantitatively by severity and frequency of occurrence of delay factors. This study assigns four main delay factors to the first level: main contractor, utility, regulatory authority, and financial and country factor. The second and the third levels are designed with 12 sub-factors and 32 sub-sub-factors, respectively. This study finds the top five most important sub-sub-factors, which are as follows: policy changes, political instability and public intervention; uncompromising regulatory criteria and licensing documents conflicting with existing regulations; robust design document review procedures; redesign due to errors in design and design changes; and worldwide shortage of qualified and experienced nuclear specific equipment manufacturers. The proposed combined AHP-RII methodology is capable of assessing delay risk effectively and efficiently. Decision makers can apply risk informed decision making to avoid unexpected construction delays of NPPs.

• 품질경영학회지
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• 제50권1호
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• pp.125-138
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• 2022

Purpose: Failure Mode and Effect Analysis (FMEA) is a widely utilized technique to measure product reliability by identifying potential failure modes. Even though FMEA techniques have been studied, the form of Risk Priority Number (RPN) used to evaluate risk priority in FMEA is still questionable because of its shortcomings. In this study, we suggest common RPN(cRPN) to resolve shortcomings of the traditional RPN and show the extensibility of cRPN. Methods: We suggest cRPN which is based on Cobb-Douglas production function, and represent the various application on weighting risk factors, weighted RPN in a mathematical way, and show the possibility of statistical approach. We also conduct numerical study to examine the difference of the traditional RPN and cRPN as well as the potential application from the analysis on marginal effects of each risk factor. Results: cRPN successfully integrates previously suggested approaches especially on the relative importance of risk factors and weighting RPN. Moreover, we analyze the effect of corrective actions in terms of econometric analysis using cRPN. Since cRPN is rely on the reliable mathematical model, there would be numerous applications using cRPN such as smart factory based on A.I. techniques. Conclusion: We propose a reliable mathematical model of RPN based on Cobb-Douglas production function. Our suggested model, cRPN, resolves various shortcomings such as consideration of the relative importance, the effect of combinations among risk factors. In addition, by adopting a reliable mathematical model, quantitative approaches are expected to be applied using cRPN. We find that cRPN can be utilized to the field of industry because it is able to be applied without modifying the entire systems or the conventional actions.

• Journal of Information Technology Applications and Management
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• 제11권4호
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• pp.103-120
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• 2004

Identifying validated risk factors in software risk management is imperative for project managers. Although validated risk lists were provided by previous researchers, risk list associated with software project performance areas was not provided as yet. This paper represents a first step toward understanding risk lists by various project performance areas (time, cost, and quality) to help project managers alleviating the possibility of software project failure. Four simultaneous exploratory surveys were conducted with 29 experienced software project managers. Three different risk factor ranking sets for each project performance area were compared with, the risk ranking, which was provided without clarifying specific project performance areas. The risk lists and their corresponding perceived importance were different from previous research results. This implies that identifying risk factors for specific project performance areas can provide additional information for project managers. We concluded by discussing implications of our finds for both research and improving risk management practice.

• 한국압력기기공학회 논문집
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• 제10권1호
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• pp.51-55
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• 2014

Based on the results of Probabilistic Safety Assessment(PSA) for a Nuclear Power Plant (NPP), Common Cause Failure(CCF) events have been recognized as one of the main contributors to the risk. Also, the CCF data and estimation method used in domestic PSA models have been pointed out as an issue with respect to the quality. The existing method of MGL and non-staggered testing even widely used were considered conservative in estimating the safety and had a limited capability in uncertainty analyses. Therefore, this paper presents the CCF estimation using a new generic data source and Alpha factor method. The analyses showed that Alpha factor and staggered method are effective in estimating the CCF contribution and risk insights of reference plant. This method will be a common bases for the optimization of new design for the construction plants as well as for the updating of safety assessment on the operating nuclear power plants.

• Nutrition Research and Practice
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• 제2권2호
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• pp.85-92
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• 2008

The present study was conducted to develop a Multi-dimensional Body Image Scale for Malaysian female adolescents. Data were collected among 328 female adolescents from a secondary school in Kuantan district, state of Pahang, Malaysia by using a self-administered questionnaire and anthropometric measurements. The self-administered questionnaire comprised multiple measures of body image, Eating Attitude Test (EAT-26; Gamer & Garfinkel, 1979) and Rosenberg Self-esteem Inventory (Rosenberg, 1965). The 152 items from selected multiple measures of body image were examined through factor analysis and for internal consistency. Correlations between Multi-dimensional Body Image Scale and body mass index (BMI), risk of eating disorders and self-esteem were assessed for construct validity. A seven factor model of a 62-item Multi-dimensional Body Image Scale for Malaysian female adolescents with construct validity and good internal consistency was developed. The scale encompasses 1) preoccupation with thinness and dieting behavior, 2) appearance and body satisfaction, 3) body importance, 4) muscle increasing behavior, 5) extreme dieting behavior, 6) appearance importance, and 7) perception of size and shape dimensions. Besides, a multidimensional body image composite score was proposed to screen negative body image risk in female adolescents. The result found body image was correlated with BMI, risk of eating disorders and self-esteem in female adolescents. In short, the present study supports a multi-dimensional concept for body image and provides a new insight into its multi-dimensionality in Malaysian female adolescents with preliminary validity and reliability of the scale. The Multi-dimensional Body Image Scale can be used to identify female adolescents who are potentially at risk of developing body image disturbance through future intervention programs.

• 한국항해항만학회지
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• 제40권3호
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• pp.147-157
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• 2016

시장의 세계화와 정보통신의 발전에 의해 물류 네트워크가 장기, 복잡화되어 지며, 네트워크 내에서 발생하는 리스크에 대응할 수 있는 시스템 능력이 감퇴했다. 이러한 리스크의 발생에 의해 물류시스템의 신뢰성이 저하되어, 리스크 관리의 필요성이 함께 증가하였다. 본 연구에서는 운송시스템 상에서 발생할 수 있는 리스크를 정의하고, 운송시스템의 신뢰성과 리스크 간의 관계를 규명하였다. 또한 운송시스템의 리스크 인자를 도출하여, 운송시스템의 리스크를 수리적으로 평가하는 분석 방법론을 제안하였다. 리스크 인자의 값을 산정하기 위해 발생 지수와 영향지수를 이용하였다. 본 연구에서 제안한 분석방법론을 대형화물자동차 운송시스템에 적용하여 사례연구를 실시하였고, 적용된 운송시스템에 대한 리스크 지수를 최종적으로 도출하였다. 본 연구결과로서 운송시스템에 대한 리스크를 수치화하여 분석 할 수 있음을 보였으며, 향후 본 연구 결과가 운송시스템의 리스크 관리와 리스크 회피전략 도출을 위한 기초연구자료로 활용될 것으로 판단된다.

• 정보처리학회논문지D
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• 제19D권3호
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• pp.257-262
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• 2012

본 연구는 화주와 물류업체의 협업을 통하여 급변하는 물류 환경에 유연하기 대응하기 위한 공급사슬망에서의 리스크 관리의 중요성과 리스크 분류체계를 제시하는데 있다. 이를 위하여 첫째, 공급사슬리스크와 관련된 기존연구를 고찰하여 18가지의 리스크 발생 원인별로 47개의 리스크요인을 파악하였다. 둘째, 파악된 리스크 요인을 토대로 기업 전문가 집단의 의견을 수렴하여 공급사슬망 관점에서 3개의 대분류와 10개의 중분류로 분류하였다. 셋째, 분류된 리스크에 대해 화주기업과 물류기업을 대상으로 설문 실시 후 확인적 요인분석, 집중타당성, 판별타당성 검증기법을 이용하여 공급사슬망 리스크 분류의 타탕도를 검증하였다. 마지막으로 검증결과를 바탕으로 시사점을 제시한다.

• 한국건설관리학회논문집
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• 제14권2호
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• pp.150-159
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• 2013

정부는 장기적인 관점에서 해외건설사업의 활성화와 수주 경쟁력 강화에 주력하고 있다. 최근에는 단순 도급공사 뿐만 아니라, 설계 및 엔지니어링, 건설사업관리(CM)) 사업의 해외진출 역시 점진적으로 늘어나는 추세이다. 하지만 현재까지 해당 분야에 대한 리스크 분석 사례는 미미한 실정이다. 이에 본 연구에서는 참여주체 별 해외건설공사 리스크에 대한 비교분석을 위하여 리스크를 계층화하고, 도출 된 리스크요인에 대하여 PI척도를 활용한 전문가 대상 설문을 실시하여 그 특징을 비교하여 보았다. 본 연구의 결과로써, 해외건설 국가리스크를 총 6 Section, 31개의 요소로 계층화 하였고, 이를 기초로하여 참여주체 별 중요도를 도출하였다, 또한 Risk Matrix에 따라 시공사 17개, 설계사 14개, CM사 17개의 핵심리스크 요인을 선정하고 이를 비교 분석 하였다. 본 연구 결과는 향후 건설사업 참여주체 별 사업 특성에 맞는 리스크관리전략 수립 및 평가모델 구축을 위한 기초자료로 활용 가능할 것으로 기대된다.

• 한국건축시공학회지
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• 제13권4호
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• pp.424-433
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• 2013

There have been few attempts made to perform a systematic analysis of the various risk influence factors in building development projects. This study suggests an analysis of the risk influence factors in the process of feasibility studies for apartment building development projects. To reflect the voice of professionals, surveys were carried out. In addition, an FD-AHP method was applied to identify the importance of the risk influence factors. Through the surveys, major risk factors were separately identified as direct and/or indirect elements. An analysis of risk influence factors supports an effective feasibility study of apartment building development projects.

• 산업경영시스템학회지
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• 제46권3호
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• pp.221-230
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• 2023

Under increased complexity and uncertainty of overseas construction projects, it is important for construction companies to improve their own project risk management capabilities instead of risk-taking strategies to secure competitiveness in the overseas construction market. Although most of the risks occur in project execution stage, many previous studies focused on planning stage including risk identification and analysis among PRM process. Therefore, this study aims to verify the effectiveness of whole PRM process during project execution stage through empirical study on participants of overseas construction projects. As the result it was found that first, the factor directly affects the project success is the execution process of PRM. It implies that appropriate actions such as appointing charged manager for risks, timely implementation of responding plan, continuous risk monitoring and updating established plan are the key for contribution to the project success. Second, the importance of communication in PRM is also found, which is not conducted at a specific but throughout the entire PRM process and need to be managed as essential factor for successful PRM..