National Aeronautics and Space Administration Consideration of Safety and Mission Success in an MBSE Environment Presented at the NASA/JPL MBSE Symposium January 27, 2017 Dr. Frank Groen Office of Safety and Mission Assurance NASA Headquarters Washington DC sma.nvasa.gov Interest in MBSE based on OSMA’s Mission  Health of Safety and Mission Assurance (SMA) discipline capabilities – Challenge: maintain SMA support of current and future programs – Opportunity: advance practices  Impact on Technical Authority’s checks and balances function: concurrence on decisions involving risk to safety & mission success considering: – Soundness of technical basis – Authority to accept risk – Acceptability of aggregate risk to SMS See NID 8000-108 sma.nvasa.gov Some Top-Level Considerations sma.nvasa.gov A S&MS Framework within the MBSE Infrastructure  Pursue objectives-driven rather than product-oriented approach  Decompose SMA objectives to guide selection of processes, tools, standards, performance measures; track assurance shortfalls and risk; structure assurance case sma.nvasa.gov S&MS Use Cases for MBSE Infrastructure  Model S&MS objectives, performance measures, uncertainties  Optimize S&MS within cost/schedule constraints; be part of trades  Identify S&MS risk drivers; model accident scenarios;  Track critical items and controls/assurance activities  Validation & verification of S&MS requirements  Document risk acceptance decisions consistent with mission classification  Document and evaluate S&MS case including alternate approaches and accepted risks  Conduct assurance of the model itself sma.nvasa.gov Final Thoughts Adoption of MBSE incentive and opportunity to fundamentally advance the assurance discipline. A clear and consistent view of S&MS objectives will benefit such an advance sma.nvasa.gov