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System Safety - A Quantitative Fallout from Reliability Analysis
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English
Abstract
This paper presents a method to quantitatively evaluate the safety of a system by utilizing existing reliability techniques and data. The premise this paper develops is that crew safety is a special case of system safety. Therefore, the reliability analyses and mathematical models developed to evaluate crew safety are considered applicable to a system safety analysis. System safety will be developed as the probability of successfully completing or safely aborting a given operation or test.
The relationship and utility of crew safety mathematical models, failure mode-effect analyses, criticality analyses, critical items lists, component failure data, and system effectiveness are discussed. The methodology developed for the display of system safety as a probability is the extension, reorientation, and selective utilization of these techniques and analyses. This is accomplished by 1) extension of these analyses to other than flight systems and/or mission operations, and 2) consideration of a safe abort capability through utilization of operating personnel or automatic sequencing to initiate corrective measures to avert a potentially hazardous situation. The advantages of system safety being developed as a product of an existing technology include maximum utilization of existing procedures, data, and computer programs, resulting in an overall program cost effectiveness. The advantage of system safety being developed as a quantitative figure of merit is its utilization as a parameter of system effectiveness.
Authors
Citation
Jordan, J. and Buchanan, R., "System Safety - A Quantitative Fallout from Reliability Analysis," SAE Technical Paper 670684, 1967, https://doi.org/10.4271/670684.Also In
References
- Parkhill R. L. Pauperas, J. Jr. “Component Failure Effect on Systems, An Analytical Model.” Douglas Engineering Paper No. 1740, presented to The Fourth Annual Seminar on Reliability for Space Vehicles December 1963
- “Tri-Service and NASA Failure Rate Data Program: Failure Rate Data Handbook,” U.S. Naval Fleet Missile Systems Analysis and Evaluation Group, Bureau of Naval Weapons Corona, California 5
- MIL-S-38130 (USAF), Military Specification “Safety Engineering of Systems and Associated Subsystems, and Equipment: General Requirements for,” September 1963
- Weapon System Effectiveness Industry Advisory Committee “Chairmans Final Report” January 1965
- Wilson R. B. “Crew Survival Goals for Space Missions,” Douglas Engineering Paper No. 3435, Presented to American Society of Mechanical Engineers Human Factors Division Chicago, Illinois November 1965