Computer aided method for system safety and reliability assessments
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Authors
Roycroft, Steven Michael.
Subjects
Advisors
Rhoades, Mark M.
Huang, Louis C.
Date of Issue
2008-09
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
The objective of this study was to determine a methodology for implementing feedback loops into a logical, automated, computer assisted probability assessment tool. A tool exists called the GO program, which allows for systems to be modeled in a block diagram or schematic format and then analyzed in a structured manner to determine the probabilities of outcome events. The challenge was to incorporate a method for analyzing feedback loops. Given the difficulty involved with using computer code to analyze feedback loops, reliability engineers would normally create two separate models. To allow for a single model to be used and achieve consistent and repeatable results, a methodology for creating multiple layers of feedback loops in increasing complexity has been analyzed for use with the GO program. Monte Carlo simulations for each of these representative models have been constructed and analyzed to validate the adequacy of the GO program to effectively create probabilities of event success and failure. With the demonstrated ability of the GO program to correctly model feedback loops, it clears a path for the Department of Defense to investigate the benefits of adopting a standardized approach for the analyses of complex systems.
Type
Thesis
Description
Series/Report No
Department
Systems Engineering (SE)
Identifiers
NPS Report Number
Sponsors
Funding
Format
xvi, 77 p. : ill. ;
Citation
Distribution Statement
Approved for public release; distribution is unlimited.