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Model Based Mission Assurance in a Model Based Systems Engineering (MBSE) Framework: State-of-the-Art AssessmentThis report explores the current state of the art of Safety and Mission Assurance (S&MA) in projects that have shifted towards Model Based Systems Engineering (MBSE). Its goal is to provide insight into how NASA's Office of Safety and Mission Assurance (OSMA) should respond to this shift. In MBSE, systems engineering information is organized and represented in models: rigorous computer-based representations, which collectively make many activities easier to perform, less error prone, and scalable. S&MA practices must shift accordingly. The "Objective Structure Hierarchies" recently developed by OSMA provide the framework for understanding this shift. Although the objectives themselves will remain constant, S&MA practices (activities, processes, tools) to achieve them are subject to change. This report presents insights derived from literature studies and interviews. The literature studies gleaned assurance implications from reports of space-related applications of MBSE. The interviews with knowledgeable S&MA and MBSE personnel discovered concerns and ideas for how assurance may adapt. Preliminary findings and observations are presented on the state of practice of S&MA with respect to MBSE, how it is already changing, and how it is likely to change further. Finally, recommendations are provided on how to foster the evolution of S&MA to best fit with MBSE.
Document ID
20170005538
Document Type
Contractor Report (CR)
Authors
Cornford, Steven L. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Feather, Martin S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
June 13, 2017
Publication Date
August 29, 2016
Subject Category
Quality Assurance and Reliability
Report/Patent Number
JPL-Publ-17-26
JPL-D-97731
NASA/CR-2016-219272
Funding Number(s)
CONTRACT_GRANT: NNN12AA01C
WBS: WBS 724297.30.31.11
Distribution Limits
Public
Copyright
Public Use Permitted.

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