INCOSE MBSE Model Based System Engineering Breakout for

INCOSE (MBSE) Model Based System Engineering Breakout for Change Scenario Jan 22, 2012 INCOSE IW 12 MBSE Workshop MBSE Wiki page: http: //www. omgwiki. org/mbse MBSE Model Management Wiki page: http: //www. omgwiki. org/MBSE/doku. php? id=mbse: modelmgt INCOSE IW 12 MBSE Workshop 1

Outline • Scenario • Integration Challenges • Solutions • Next Steps INCOSE IW 12 MBSE Workshop 2

Integrated Systems Engineering Vision Hydraulic Fluid: SAE 1340 notcompliant Power Rating: 18 Amps Thermal/Heat Dissipation: 780° Ergonomic/Pedal Feedback: 34 ERGS Hydraulic Pressure: 350 PSI Sensor MTBF: 3000 hrs Automatic Cruise Control <FAULT> Minimum Turn Radius: 24 ft. Dry Pavement Braking Distance at INCOSE IW 12 60 MPH : 110 ft. 90 at 60 MPH : 110 ft MBSE Workshop

Challenges • No bridge among tools to support impact analysis • How to identify the impact of changes given a full baseline design – – – Who and what is impacted Is the rationale sufficient Is the analysis sufficient Is the original analysis model sufficient Are the design constraints formalized Is the original traceability sufficient • Key or important relationships are obfuscated or the resulting impact report is overwhelming/irrelevant. INCOSE IW 12 MBSE Workshop 4

Challenges (continued) • • • Tiered impact. Ripple effect What are the most important requirements Multiples of kinds of models involved Understanding the conflicting design goals The knowledge behind the design is absent (tacit knowledge) INCOSE IW 12 MBSE Workshop 5

Solutions • Discover what is available – Quickly understand what a baseline contains • Real world – Find the holes – Fill in the holes • • Measure coverage for rationale and decisions Preventive - More rigor in the process Develop test cases up front Capture allowable design constraints in models INCOSE IW 12 MBSE Workshop 6

Solutions (continued) • Link analysis models to architecture models using key analysis parameters – What are the key parameters at each level. – Link them by constraints • A more parametric approach. Need a better ability to visualize. • Analysis of new use cases to identify new constraints and parameters. * • To incrementally roll out changes, need to manage multiple active baselines INCOSE IW 12 MBSE Workshop 7

Next Steps • Develop guidelines for methodology/language/tools support an impact analysis for an entire set of system models? • Explore visualizing connectivity • Make rigor easy to do INCOSE IW 12 MBSE Workshop 8

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