• Title/Summary/Keyword: Railway human reliability analysis

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Revision of the Railway Human Reliability Analysis Procedure and Development of an R-HRA Software (철도사고 위험도평가를 위한 철도 인간신뢰도분석 방법의 개정과 전산 소프트웨어의 개발)

  • Kim, Jae-Whan;Kim, Seung-Hwan;Jang, Seung-Cheol
    • Journal of the Korean Society for Railway
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    • v.11 no.4
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    • pp.404-409
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    • 2008
  • This paper consists largely of two parts: the first part introduces the revised railway human reliability analysis (R-HRA) method which is to be used under the railway risk assessment framework, and the second part presents the features of a computer software which was developed for aiding the R-HRA process. The revised R-HRA method supplements the original R-HRA method by providing a specific task analysis guideline and a classification of performance shaping factors (PSFs) to support a consistent analysis between analysts. The R-HRA software aids the analysts in gathering information for HRA, qualitative error prediction including identification of external error modes and internal error modes, quantification of human error probability, and reporting the overall analysis results. The revised R-HRA method and software are expected to support the analysts in an effective and efficient way in analysing human error potential in railway event or accident scenarios.

A Case Study for the Selection of a Railway Human Reliability Analysis Method (철도 인간신뢰도분석 방법 선정을 위한 사례분석)

  • Jung, Won-Dea;Jang, Seung-Cheol;Wang, Jong-Bae;Kim, Jae-Whan
    • Journal of the Korean Society for Railway
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    • v.9 no.5 s.36
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    • pp.532-538
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    • 2006
  • 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 study introduces a case study that was performed to select an appropriate R-HRA method. Three HRA methods were considered in the case study: (1) the K-MRA(THERP/ASEP-based) method, (2) the HEART method, (3) the RSSB-HRA method. Two case events were selected based on the review of the railway incidents/accidents, which include (1) a real-end collision event, which occurred on the railway between the Gomo and Kyungsan stations in 2003, (2) the signal passed at danger(SPAD) events, which are caused from a variety of factors. The three HRA methods were applied to both case events, and then the strengths and limitations of each method were derived and compared with each other from the viewpoint of the applicability of a HRA method to the railway industry.

Review of Human Reliability Analysis Methods for Railway Risk Assessment (철도 위험도 평가를 위한 인간신뢰도분석 방법 검토)

  • Jung, Won-Dea;Jang, Seung-Cheol;Kwak, Sang-Log;Kim, Jae-Whan
    • Proceedings of the KSR Conference
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    • 2006.11b
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    • pp.1140-1145
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    • 2006
  • 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.

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A Study on Program Review Model for Human Factors in Railway Industry (철도산업의 안전업무 종사자 인적요인 관리를 위한 검토모델 연구)

  • Kwak, Sang-Log;Wang, Jong-Bae;Park, Chan-Woo;Choi, Don-Bum
    • Proceedings of the KSR Conference
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    • 2008.11b
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    • pp.2040-2044
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    • 2008
  • Recently, many safety measures are developing for the prevention of human error, which is main factors of railway accident. For the efficient management of human factors, many expertise on design, conditions, safety culture and staffing are required. But current safety management activities on safety critical works are focused on training, due to the limited resource and information. In order to establish railway human factors management, a systematic review model is required. Based on system engineering and nuclear industry model, a program review model is proposed in this study. The model includes operating experience review, task analysis, staffing and qualification, human reliability analysis, huma-system interface design, procedure development, training program, verification and validation, implementation and monitoring. Results can be applied for the review of safety measures relating to human factors.

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A Study on the Prevention Measures of Human Error with Railway Drivers (열차 운전 종사자를 대상으로 한 인적오류의 개선 방안 연구)

  • Kim, Dong Won;Song, Bo Young;Lee, Hi Sung
    • Journal of the Korean Society of Safety
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    • v.34 no.1
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    • pp.76-81
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    • 2019
  • In this study, the causes of human error were identified through the survey of the drivers of the three organizations: Seoul Metro, Seoul Metropolitan Rapid Transit Corporation, and Korail. It was started with the aim of finding and eliciting causes in various directions including human factors, job factors, and environmental factors. The Cronbach alpha value was 0.95 for the reliability significance of the stress-induced factors in the operational area. The significance probability for organisational factors was shown to be 0.82, and the significance of the sub-accident experience and the driving skill factors in operation was 0.81 In addition, the analysis results showed that stress-induced in the field of driving is higher than the human factors in the reliability analysis. The results of the analysis confirmed that the reliability of the organizational and operational stress-induced factors was higher than other causes. In order to reduce urban railroad accidents, this paper suggests a method for operating safe urban railroad through the minimization human errors.

Taxonomy of Performance Shaping Factors for Human Error Analysis of Railway Accidents (철도사고의 인적오류 분석을 위한 수행도 영향인자 분류)

  • Baek, Dong-Hyun;Koo, Lock-Jo;Lee, Kyung-Sun;Kim, Dong-San;Shin, Min-Ju;Yoon, Wan-Chul;Jung, Myung-Chul
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.31 no.1
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    • pp.41-48
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    • 2008
  • Enhanced machine reliability has dramatically reduced the rate and number of railway accidents but for further reduction human error should be considered together that accounts for about 20% of the accidents. Therefore, the objective of this study was to suggest a new taxonomy of performance shaping factors (PSFs) that could be utilized to identify the causes of a human error associated with railway accidents. Four categories of human factor, task factor, environment factor, and organization factor and 14 sub-categories of physical state, psychological state, knowledge/experience/ability, information/communication, regulation/procedure, specific character of task, infrastructure, device/MMI, working environment, external environment, education, direction/management, system/atmosphere, and welfare/opportunity along with 131 specific factors was suggested by carefully reviewing 8 representative published taxonomy of Casualty Analysis Methodology for Maritime Operations (CASMET), Cognitive Reliability and Error Analysis Method (CREAM), Human Factors Analysis and Classification System (HFACS), Integrated Safety Investigation Methodology (ISIM), Korea-Human Performance Enhancement System (K-HPES), Rail safety and Standards Board (RSSB), $TapRoot^{(R)}$, and Technique for Retrospective and Predictive Analysis of Cognitive Errors (TRACEr). Then these were applied to the case of the railway accident occurred between Komo and Kyungsan stations in 2003 for verification. Both cause decision chart and why-because tree were developed and modified to aid the analyst to find causal factors from the suggested taxonomy. The taxonomy was well suited so that eight causes were found to explain the driver's error in the accident. The taxonomy of PSFs suggested in this study could cover from latent factors to direct causes of human errors related with railway accidents with systematic categorization.

A Study on the Feasibility of Evaluating the Complexity of KTX Driving Tasks (KTX 운전직무에 대한 복잡도 평가 - 타당성 연구)

  • Park, Jin-Kyun;Jung, Won-Dea;Jang, Seung-Cheol;Ko, Jong-Hyun
    • Journal of the Korean Society for Railway
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    • v.12 no.5
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    • pp.744-750
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    • 2009
  • According to the result of related studies, the degradation of human performance has been revealed as one of the most significant causes resulting in the safety of any human-involved system. This means that preventing the occurrence of accidents/incidents through avoiding the degradation of human performance is prerequisite for their successive operation. To this end, it is necessary to develop a plausible tool to evaluate the complexity of a task, which has been known as one of the decisive factors affecting the human performance. For this reason, in this paper, the complexity of tasks to be conducted by KTX drivers was quantified by TACOM measure that is enable to quantify the complexity of proceduralized tasks being used in nuclear power plants. After that, TACOM scores about the tasks of KTX drivers were compared with NASA-TLX scores that are responsible for the level of a subjective workload to be felt by KTX drivers.

A Study on FMEA Analysis Method for Fault Diagnosis and Predictive Maintenance of the Railway Systems (철도시스템 이상진단 및 예지정비를 위한 FMEA 분석 방안 연구)

  • Wang Seok Oh;Kyeong Hwa Kim;Jaehoon Kim
    • Journal of the Korean Society of Safety
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    • v.38 no.5
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    • pp.43-50
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    • 2023
  • With the advent of industrialization, consumers and end-users demand more reliable products. Meeting these demands requires a comprehensive approach, involving tasks such as market information collection, planning, reliable raw material procurement, accurate reliability design, and prediction, including various reliability tests. Moreover, this encompasses aspects like reliability management during manufacturing, operational maintenance, and systematic failure information collection, interpretation, and feedback. Improving product reliability requires prioritizing it from the initial development stage. Failure mode and effect analysis (FMEA) is a widely used method to increase product reliability. In this study, we reanalyzed using the FMEA method and proposed an improved method. Domestic railways lack an accurate measurement method or system for maintenance, so maintenance decisions rely on the opinions of experienced personnel, based on their experience with past faults. However, the current selection method is flawed as it relies on human experience and memory capacity, which are limited and ineffective. Therefore, in this study, we further specify qualitative contents to systematically accumulate failure modes based on the Failure Modes Table and create a standardized form based on the Master FMEA form to newly systematize it.

The Effects of the Service Orientation on Job Satisfaction and Customer Orientation of the Urban Railway-operating Company (도시철도운영기관의 서비스지향성이 직무만족과 고객지향성에 미치는 영향)

  • Lee, Hyun-Ju;Kook, Kwang-Ho
    • Journal of the Korean Society for Railway
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    • v.12 no.5
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    • pp.761-771
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    • 2009
  • This paper performed an empirical study through the survey to investigate the effects of the service orientation of the urban railway-operating company on employees' job satisfaction and customer orientation. For this, the surveyed data was analyzed through factor analysis, reliability analysis, and regression analysis. The difference between railway-operating companies was analyzed by the t-test and the differences between workers in different fields were analyzed by the ANOVA test. The results show that 1) human resource management, employee empowerment, service leadership, and service system are positively related to employees' job satisfaction in the decreasing order, 2) the service system, human resource management, and service leadership are positively related to customer orientation, but employee empowerment is negatively related to customer orientation, 3) the workers of the urban railway-operating company A and B show significant differences in job satisfaction and customer orientation, and 4) the job satisfaction and the customer orientation of the rolling stock maintenance workers was the highest and that of service workers in station was the lowest.

Development and Evaluation of Human Reliability Analysis Model for the Reduction of Human Errors (인적오류 저감을 위한 인간 신뢰도 분석 체계 및 평가에 관한 연구)

  • Jung, Kyung-Hee;Byun, Seong-Nam;Cho, Jai-Rip
    • Proceedings of the KSR Conference
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    • 2010.06a
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    • pp.2048-2051
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    • 2010
  • Almost all companies have paid much attention to the safety management ranging from maintenance to operation even at the stage of designing in order to prevent accidents, but fatal accidents continue to increase throughout the world. In particular, it is essential to systematically prevent such fatal accidents as fire, explosion or leakage of toxic gas at factories in order to not only protect the workers and neighbors but also prevent economic losses and environmental pollution. In addition, HRA may be used to detect the human errors which may cause accidents or trace back to any mistake on the part of workers. Usually, HRA technique is used in association with other risk assessment techniques. Moreover, it can serve to enumerate the human errors which may occur during operation or down-time or correct the existing system to reduce the mistakes. This work focuses on the coincidence of human error and mechanical failure for management of human error, and on some important performance shaping factors to propose a method for improving safety effectively of the process industries.

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