Analysis of Restricted-Speed Accidents Using Fault Tree Analysis

2018 ◽  
Author(s):  
Zhipeng Zhang ◽  
Xiang Liu ◽  
Zheyong Bian
Keyword(s):  
Risk Mitigation ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Mitigation Strategies ◽  
Quantitative Risk Assessment ◽  
Transportation Safety ◽  
Accurate Estimation ◽  
Tree Analysis ◽  
Rule Compliance ◽  
Compliance Problem

Restricted speed is the speed that permits stopping within one-half the range of vision, normally not exceeding 20 miles per hour. The occurrences of some severe accidents at restricted speeds have highlighted the importance of safety improvements in restricted-speed operations. The Federal Railroad Administration (FRA) has identified restricted-speed violations as a common rule compliance problem. Nevertheless, little prior research has been conducted on the analysis of train operations and safety risk under restricted speeds. This paper used Fault Tree Analysis to explore scenarios for restricted-speed operations to identify failure paths that lead to train accidents. Understanding restricted-speed train accident causal chains and corresponding structural representations of relevant contributory precursors can contribute to more accurate estimation of restricted-speed risk. Four recent restricted-speed accidents were studied based on the information from the National Transportation Safety Board (NTSB) and FRA. This study may serve as a reference leading to the further development of quantitative risk assessment and the evaluation of risk mitigation strategies for restricted-speed operations.

Risk Assessment in Bridge Construction Projects Using Fault Tree and Event Tree Analysis Methods Based on Fuzzy Logic

2015 ◽  
Vol 1 (3) ◽  
Author(s):  
Gholamreza Abdollahzadeh ◽  
Sima Rastgoo
Keyword(s):  
Fuzzy Logic ◽  
Traditional Approach ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Mitigation Strategies ◽  
Fuzzy Arithmetic ◽  
Event Tree ◽  
Event Tree Analysis ◽  
Tree Analysis ◽  
Risk Event

In this paper, interruption risk in construction activities of bridge projects is assessed in order to identify the main causes of its occurrence and also to determine the potential outcomes resulted from the risk occurrence. To do this, fault tree and event tree analysis (ETA) methods are applied. As the application of the traditional approach of these two methods is difficult in many cases due to limited access to information, fuzzy arithmetic can be considered as a useful tool. In this research, first, fault tree structure is created according to consequences resulted from the Delphi method. Then, the probability of risk occurrence is calculated by applying fault tree analysis (FTA) based on fuzzy logic. By establishing the structure of fault tree related to the failure risk of mitigation strategies, the main causes relating to failure of strategies are identified. The structure of the event tree is created using the obtained results; moreover, the expected monetary value (EMV) of risk event is computed. Finally, to validate the results obtained, a model is created by Monte Carlo simulation and then the results obtained by applying the two methods are compared. The EMV of the risk event evaluated in this paper is determined to be 9.93% of the project baseline cost.

scholarly journals RISK MANAGEMENT ON THE WARSHIP TASK OPERATIONS

JOURNAL ASRO ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 23
Author(s):  
Diksono Diksono ◽  
I Made Jiwa ◽  
Suparno Suparno
Keyword(s):  
Risk Mitigation ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Main Tool ◽  
Main Task ◽  
Event Tree ◽  
Event Tree Analysis ◽  
Tree Analysis ◽  
Formal Safety Assessment ◽  
The Impact

ABSTRACT The main task of the Indonesia Navy is to enforce the law and maintain security in the territorial sea of national jurisdiction, so that the Indonesian Navy is required to have the main tool of weapons systems (Alutsista) are always ready to carry out the task. The frequent occurrence of accidents experienced by the Indonesian Warship (KRI). This reduces the ability of Warship in performing the task. The purpose of this research is to investigate the causes and effects of accidents, and seek risk mitigation that is considered appropriate. Formal Safety Assessment (FSA) is a structured and systematic methodology used for maritime safety analysis. The fault tree analysis is used to investigate the cause of marine accidents and the event tree analysis is used to determine the impact of an accident. The results of this study are FSA can be effectively applied in accident investigations, although the calculation of cost benefit analysis for warships can be ignored because the Warship task cannot be compared to the value of money.  Keywords: Task Operation, Warship, FSA, fault tree analysis, event tree analysis

scholarly journals Application of Failure Mode Effects Analysis (FMEA) Method and Fault Tree Analysis (FTA) Towards Health and Occupational Safety on Jetty Project, Gresik, Indonesia

2018 ◽  
Vol 1 (2) ◽  
pp. 100 ◽  
Author(s):  
Mohamad Ferdaus Noor Aulady ◽  
Felicia Nuciferani ◽  
Satya Wicaksono
Keyword(s):  
Failure Mode ◽  
Occupational Safety ◽  
Risk Mitigation ◽  
Fault Tree ◽  
Health And Safety ◽  
Fault Tree Analysis ◽  
Simple Method ◽  
Effect Analysis ◽  
Tree Analysis ◽  
Work Accident

Abstract: Work accident in Indonesia has considerably increased every year. Work accident is often occurred in Construction sector. This is due to lack of proper occupational health and safety system (OHS). By the simple OHS management system, this issue can be improved. This research aim to identify the most fatal and high intensity risk of Jetty Project. Furthermore, this study also identify the risk cause that occur by simple method. Therefore, it will be easier for the company to do risk mitigation. To overcome this issue this research use Failure Mode Effect Analysis and Fault Tree Analysis methods. The results of this research show the most dominant risk priority in the girder bridge construction is the girder fall from during the mobilization. And daydream is the most dominant causes.

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