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NASA-TLX 방법에 의한 KTX 운전 직무부하 분석
정원대(Jung Wondea),고종현(Ko Jong-Hyun),박진균(Park Jinkyun),곽상록(Kwak Sang-Log),임승수(Lim Seoung-Su) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
Human factors still plays a significant role in railway accidents. The accidents often resulted from multiple causes of hardware failures and human errors. So to ensure the safety of railway operations, human error should be effectively prevented and managed. Among several factors influencing human performance, task load (or task complexity) is well known as a major contributor to human error. In order to reduce the potential of human error, a systematic analysis should be undertaken to evaluate task load and to reduce it by modifying task process and/or education&training. In this paper, we proposed a systematic framework for railway industry to perform task analysis and to evaluate task load, and applied it to KTX operational tasks. According to the application study, we identified 14 generic task types of KTX operation. And also this paper shows the quantitative task load of those generic tasks which were analyzed by NASA-TLX method.
정원대(Wondea Jung),김재환(Jaewhan Kim) 대한인간공학회 2011 大韓人間工學會誌 Vol.30 No.1
Objective: The aim of this paper is to introduce the activities and research trends of human reliability analysis including brief summary about contents and methods of the analysis. Background: Various approaches and methods have been suggested and used to assess human reliability in field of risk assessment of nuclear power plants. However, it has noticed that there is high uncertainty in human reliability analysis which results in a major bottleneck for risk-informed activities of nuclear power plants. Method: First and second generation methods of human reliability analysis are reviewed and a few representative methods are discussed from the risk assessment perspective. The strength and weakness of each method is also examined from the viewpoint of reliability analyst as a user. In addition, new research trends in this field are briefly summarized. Results: Human reliability analysis has become an important tool to support not only risk assessment but also system design of a centralized complex system. Conclusion: Human reliability analysis should be improved by active cooperation with researchers in field of human factors. Application: The trends of human reliability analysis explained in this paper will help researchers to find interest topics to which they could contribute.
철도와 타 산업에서의 인적오류 보고 및 분석 체계 비교 분석
정원대(Jung Wondea),고종현(Ko Jong Hyun),곽상록(Kwak Sang Log) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
Human factors still plays a significant part in many railway accidents. The accidents often resulted from multiple causes of hardware failures and human errors. So to ensure the safety of railway operations, human error should be prevented effectively. In order to reduce the potential of human error, a systematic error analysis should be undertaken in advance for identifying the root causes of the error. In this paper, we reviewed the present state of the reporting and investigation of human error in railway industries, and compared it to ones of other industries such as aviation and nuclear power.
고종현(Jonghyun Ko),정원대(Wondea Jung),김재환(Jaewhan Kim),곽상록(Sanglog Kwak) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
Human error is one of the major contributors to the railway accidents or incidents. In order to develop an effective countermeasure to remove or reduce human errors, a systematic analysis should be preferentially performed to identify their causes, characteristics, and types of human error induced in accidents or incidents. This paper introduces a case study for human error analysis of the railway accidents and incidents. For the case study, more than 1,000 domestic railway accidents or incidents that happened during the year of 2004 have been investigated and a detailed error analysis was performed on the selected 90 cases, which were obviously caused by human error. This paper presents a classification structure for human error analysis, and summarizes the analysis results such as causes of the events, error modes and types, related worker, and task type.
고종현(Ko Jonghyun),정원대(Jung Wondea),박진균(Park Jinkyun) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
According to the result of recent studies, it was revealed that the error of safety-related personnel still plays a significant role in the accidents and/or incidents of a railway system. Accordingly, in order to reduce as well as prevent human errors, it is necessary to: (1) identify the root cause of accidents/incidents, and (2) conduct a research that can provide a systematic as well as an effective way to deal with the identified human errors. To this end, it is essential to suggest appropriate countermeasures based on the result of a task load analysis, which can soundly reduce a high level of the task load put on safety-related personnel. In the light of this concern, about the tasks of railway traffic signallers, a detailed task analysis was conducted in this study. After that, the associated task load scores were quantified by NASA-TLX technique that is one of the most well-known subjective workload measurement techniques. As a result, a set of significant tasks that could put a high task load on railway traffic signallers was identified.
원자력 발전소 안전성 평가를 위한 인간 신뢰도 분석 방법론 개발 및 지원 시스템 구축
김승환(Seung Hwan Kim),정원대(Wondea Jung) 한국컴퓨터정보학회 2006 韓國컴퓨터情報學會論文誌 Vol.11 No.6
원자력발전소의 정량적 위험성 평가를 위해서 확률론적 안정성 평가 기법이 이용되고 있는데, 이를 위해서는 여러 가지 분야의 다양한 신뢰도 데이터가 필요하다. 이러한 신뢰도 자료 중에 인간의 지각 행위 및 수행 행위로부터 발생하는 인적 오류 확률은 그 특성상 실제 오류 확률을 얻기가 매우 어렵다. 따라서 인적 오류 확률을 구하기 위해서는 인간 신뢰도 분석 분야의 전문가들이 제안한 인간 신뢰도 분석 방법을 이용하여 인적 오류 확률을 추정한다. 한국 원자력 연구소에서는 이를 위해 인간의 지각 및 수행 행위에서 야기되는 인간 오류 사건을 관리하고 인적 오류 확률을 추정하기 위한 인간 신뢰도 분석 시스템을 개발하고 있다. 본 연구에서는 인간 신뢰도 분석 방법론 개발 및 이를 이용한 인간 신뢰도 분석 전산 지원 시스템의 개발 과정에 관하여 기술하였다. In order to perform a probabilistic safety assessment (PSA), it requires a large number of data for various fields. And the quality of a PSA results have become more important thing of the risk assessment . As part of enhancing the PSA quality, Korea Atomic Energy Research Institute is developing a full power Human Reliability Analysis (HRA) calculator to manage human failure events (HFEs) and to calculate the diagnosis human error probabilities and execution human error probabilities. This paper introduces the development process and an overview of a standard HRA method for nuclear power plants. The study was carried out in three stages; 1) development of the procedures and rules for a standard HRA method, 2) design of a system structure, 3) development of the HRA calculator.
김재환(Kim Jae Whan),정원대(Jung Wondea),장승철(Jang Seung Cheol),곽상록(Kwak Sang Log) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
The railway human reliability analysis (R-HRA) plays a role of identifying and assessing human failure events in the framework of the probabilistic risk assessment (PRA) of the railway systems. This paper reviews three existing HRA methods including the K-HRA (THERP/ASEP-based) method, the HEART method, the RSSB-HRA method, and introduces a case study that was performed to select an appropriate method for a railway risk assessment. The case is the signal passed at danger (SPAD) events, which are caused from a variety of factors. From the case study, the strengths and limitations of each method were derived and compared with each other from the viewpoint of the applicability to the railway industry.
Jinkyun Park(박진균),Wondea Jung(정원대) 대한인간공학회 2006 대한인간공학회 학술대회논문집 Vol.- No.-
A diagnosis procedure that allows operators to successfully identify the nature of an on-going event is inevitable for an effective and appropriate recovery. Unfortunately, studies for a framework that can suggest a unified and consistent process in constructing a serviceable diagnosis procedure seem to be scant. Thus, a systematic framework that can be used to construct a useful diagnosis procedure is suggested. In this study, using a full-scope simulator of the reference NPP, an experiment is conducted to confirm the appropriateness of the suggested framework. As a result, it is shown that an operator’s diagnosis performance is improved when the revised diagnosis procedure is used. Therefore, it is reasonable to conclude that the suggested framework is useful in constructing an effective diagnosis procedure.