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Managing Risk Reduction using a Relative Risk Prioritization Tool
Technical Paper
2007-01-3871
ISSN: 0148-7191, e-ISSN: 2688-3627
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Language:
English
Abstract
The Safety Management System (SMS) provides an environment where undesired events (proactively or reactively identified) are evaluated for the effect on safety using Risk Analysis. When the risk is evaluated, an interim risk reduction (mitigating action) may be applied to reduce the risk to a level that allows operations for a longer period before the safety issue is fully resolved. The risk assessment provides a means of evaluating the risk level and it may be difficult to quantify the “benefit” of interim mitigations that will reduce the risk. Prioritization of issues in the same risk category of the Risk Matrix is often simplified to a schedule and logistics basis of the final corrective action and often does not adequately show the benefit of the interim mitigating actions taken. Employing a concept used in System Reliability Analysis, the Design / Process Failure Modes and Effects Analysis (Design FMEA as defined in SAE J1739) uses a Risk Priority Number as a tool to identify the most significant failure modes that need to be evaluated in order to determine if redesign can mitigate the risk to a lower level. This paper will develop this concept in conjunction with an Aircraft / System Functional Hazard Assessment and acceptable level of risk (certification levels) to formulate a Risk Priority Number as a tool to rank the risks while taking into account the effectiveness of mitigating actions. A means to baseline the product acceptable level of risk / safety is also proposed in order to determine the relative risk increase from the as certified risk level.
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Authors
Citation
Kavoliunas, M., "Managing Risk Reduction using a Relative Risk Prioritization Tool," SAE Technical Paper 2007-01-3871, 2007, https://doi.org/10.4271/2007-01-3871.Also In
Aerospace Safety- Design, Maintenance/Operations, and Safety/Security
Number: SP-2141; Published: 2007-09-17
Number: SP-2141; Published: 2007-09-17
References
- Federal Aviation Administration Department of Transportation Code of Federal Regulations Title 14 - Aeronautics and Space FAR 25.1309 and FAA Advisory Circular 25.1309
- SAE “Guidelines and Methods for Conducting the Safety Assessment Process on Civil Airborne Systems and Equipment” SAE 1996-12
- SAE “Safety Assessment of Transport Airplanes in Commercial Service” SAE 2003-11
- SAE “(R) Potential Failure Mode and Effects Analysis in Design (Design FMEA), Potential Failure Mode and Effects Analysis in Manufacturing and Assembly Process (Process FMEA), and Potential Failure Mode and Effects Analysis for Machinery (Machinery FMEA)” SAE Aug 2002
- SAE “Recommended Failure Modes and Effects Analysis (FMEA) Practices for Non-Automobile Applications” SAE July 2001
- European Aviation Safety Agency AMC and GM Part 21 Guidance Material (GM) 21A.3B(d)(4) Defect Correction - Sufficiency of proposed corrective action
- Reason James “Managing the risks of Organizational Accidents” Ashgate Publishing Limited 1997 1 84014 105 0 144