Transcript INCOSE MBSE System of Systems (SoS) Activity Update

INCOSE (MBSE)
Model Based System Engineering
Breakout for
Change Scenario
Jan 22, 2012
INCOSE IW12 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
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Outline
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Scenario
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Integration Challenges
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Solutions
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Next Steps
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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
IW12
60
MPH
: 110
ft. 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
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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.
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Challenges (continued)
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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)
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Solutions
• Discover what is available
– Quickly understand what a baseline contains
• Real world
– Find the holes
– Fill in the holes
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Measure coverage for rationale and decisions
Preventive - More rigor in the process
Develop test cases up front
Capture allowable design constraints in
models
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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
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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
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