scholarly journals Abstract PS1-44: Using Fault Tree Analysis and Probabilistic Risk Assessment to Improve Medication Safety in Ambulatory Care

2008 ◽  
Vol 6 (3-4) ◽  
pp. 140-140
Author(s):  
T. S. Field ◽  
L. Garber ◽  
K. Chysna ◽  
B. Harrow ◽  
J. Tjia ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Ambulatory Care ◽  
Medication Safety ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Probabilistic Risk Assessment ◽  
Tree Analysis ◽  
Probabilistic Risk

Bayesian Network Technique in Probabilistic Risk Assessment for Multiple Hazards

2016 ◽  
Author(s):  
Shinyoung Kwag ◽  
Abhinav Gupta
Keyword(s):  
Risk Assessment ◽  
Bayesian Network ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Logic Gates ◽  
Probabilistic Risk Assessment ◽  
System Level ◽  
Multiple Hazards ◽  
Statistical Correlations ◽  
Probabilistic Risk

Conventional probabilistic risk assessment (PRA) methodologies (USNRC, 1983; IAEA, 1992; EPRI, 1994; Ellingwood, 2001) conduct risk assessment for different external hazards by considering each hazard separately and independent of each other. The risk metric for a specific hazard is evaluated by a convolution of the fragility and the hazard curves. The fragility curve for basic event is obtained by using empirical, experimental, and/or numerical simulation data for a particular hazard. Treating each hazard as an independent mutually exclusive event can be inappropriate in some cases as certain hazards are statistically correlated or dependent. Examples of such correlated events include but are not limited to flooding induced fire, seismically induced internal or external flooding, or even seismically induced fire. In the current practice, system level risk and consequence sequences are typically calculated using a Fault Tree Analysis (FTA) that uses logic gates to express the causative relationship between events. Furthermore, the basic events in an FTA are considered as independent. Therefore, conducting a multi-hazard PRA using a Fault Tree is quite impractical. In some cases using an FTA to conduct a multi-hazard PRA can even be inaccurate because an FTA cannot account for uncertainties in events and the use of logic gates limits the consideration of statistical correlations or dependencies between the events. An additional limitation of an FTA based PRA is embedded in its inability to easily accommodate newly observed data and calculation of updated risk or accident scenarios under the newly available information. Finally, FTA is not best suited for addressing beyond design basis vulnerabilities. Therefore, in this paper, we present the results from a study on multi-hazard risk assessment that is conducted using a Bayesian network (BN) with Bayesian inference. The framework can consider general relationships among risks from multiple hazards, allows updating by considering the newly available data/information at any level, and evaluate scenarios for vulnerabilities due to beyond design bases events.

Comprehensive risk assessment of river basins using Fault Tree Analysis

2019 ◽  
Vol 577 ◽  
pp. 123974 ◽  
Author(s):  
Mahdi Gachlou ◽  
Abbas Roozbahani ◽  
Mohammad Ebrahim Banihabib
Keyword(s):  
Risk Assessment ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
River Basins ◽  
Tree Analysis

Model-Based Risk Assessment of Offshore Operations

2014 ◽  
Author(s):  
Christoph Läsche ◽  
Jan Pinkowski ◽  
Sebastian Gerwinn ◽  
Rainer Droste ◽  
Axel Hahn
Keyword(s):  
Risk Assessment ◽  
Process Model ◽  
Expert Knowledge ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Specification Language ◽  
Specific Situation ◽  
Analysis Tool ◽  
Tree Analysis ◽  
Offshore Operations

Safety and dependability are major design objectives for offshore operations such as the construction of wind farms or oil and gas exploration. Today processes and related risks are typically described informally and process specification are neither reusable nor suitable for risk assessment. Here, we propose to use a specification language for processes. We integrate this specification language in a generic modeling approach in combination with an analysis tool and a tool to construct health, safety and environment (HSE) plans — a mandatory document for granting a construction/operation permit. Specifically, for each planned scenario a process is modeled, describing the detailed operation of the involved actors as well as the interaction with resources and environmental conditions. We enrich this process model with hazardous events which is facilitated by integration with an offshore operation generic hazard list, thereby giving access to expert knowledge for the specific situation to be planned. This in turn allows us to perform an automatic quantitative risk assessment using fault tree analysis. We exemplify our approach on a standard offshore operation of personnel transfer from an offshore building to another naval unit by modeling, annotating with hazards, performing the fault-tree analysis, and finally generating HSE plans.

Fault tree analysis for integrated and probabilistic risk analysis of drinking water systems

2009 ◽  
Vol 43 (6) ◽  
pp. 1641-1653 ◽  
Author(s):  
Andreas Lindhe ◽  
Lars Rosén ◽  
Tommy Norberg ◽  
Olof Bergstedt
Keyword(s):  
Drinking Water ◽  
Risk Analysis ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Water Systems ◽  
Probabilistic Risk Analysis ◽  
Tree Analysis ◽  
Probabilistic Risk ◽  
Drinking Water Systems
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