Systems Modeling Language SysML Overview

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Systems Modeling Language(SysML) Overview

• April 20, 2005

Sanford Friedenthal SysML Cochair sanford.friedent
hal_at_lmco.com [phone]
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SE Practices for Describing Systems
Future
Past

• Specifications
• Interface requirements
• System design
• Analysis Trade-off
• Test plans

Moving from Document centric to Model centric
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Why Model Based Approach ?

• Improved communications
• Reduced ambiguity
• Reduced errors
• More complete representation
• Enhanced knowledge capture

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Unified Modeling Language (UML)

• UML
• Is a visual modeling language
• Is not a methodology
• Defacto standard for SW level OO modeling
• Visual Modeling Language Notation Semantics
• Semantics meaning
• Notation representation of meaning

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UML/SysML Status

• UML V2.0
• Updated version of UML that offers significant
  capability for systems engineering over previous
  versions
• Adopted in June 2003/Finalized in 2005
• UML for Systems Engineering (SE) RFP
• Established the requirements for a system
  modeling language
• Issued by the OMG in March 2003
• SysML
• Industry Response to the UML for SE RFP
• Addresses most of the requirements in the RFP
• V1.0 expected to begin adoption in 2005

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SysML Partners

• Industry
• American Systems, BAE SYSTEMS, Boeing, Deere
  Company, EADS Astrium, Eurostep, Israel Aircraft
  Industries, Lockheed Martin, Motorola, Northrop
  Grumman, oose.de, Raytheon, THALES
• Government
• DoD/OSD, NASA/JPL, NIST
• Vendors
• Artisan, Ceira, EmbeddedPlus, Gentleware, IBM,
  I-Logix, PivotPoint Technology, Popkin, Project
  Technology, 3SL, Telelogic, Vitech
• Liaisons/Other Organizations
• AP-233, CCSDS, EAST, INCOSE, Rosetta

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SysML Scope
Development Life Cycle
Systems Engineering Process, Methods, Artifacts
Customer Reqts
System Solutions
Reqts Analysis
Arch Design
Verify Validate
Eval Altern
SoS
Applies to Each Level of the System Hierarchy
System
System
System
System Hierarchy
Subsystem
Subsystem
Component Specific Methods (e.g. HW, SW)
Item 1
Item N
Item 1
Item N
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SysML Diagram Taxonomy
Derived from UML 2 Composite Structure
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A Few Sample Diagrams
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Assemblies, Parts, Ports, Connectors Flows
Assembly
Item Flow
Port
Connector
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Continuous Systems


interruptibleRegion
r
e
v
Driving
i
Turn
r
Key On
D
continuous
Brake
Pressure
m
e
e
k
t
a
s
Braking
r
y


B
ControlOperator
S
Enable on Brake
Pressure gt 0
continuous
Modulation
Frequency
S
B
A
Monitor Traction
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Sequence Diagram with Reference
seq
Continue
seq
Question
A
B
C
A
B
ask
ref
Question
alt
DoSth
alt
ok
ok
yes
nonono
notOK
notOK
no
Derived from UML 2 Superstructure
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State Machine Diagram
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Requirement Diagram Showing Requirements Flowdown
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Related Standards Efforts
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Standard UML Profile for DoDAF

• Recent initiative started through the OMG
• Purpose
• Develop standard representations of DoDAF
  products using UML/SysML
• Benefits
• Improved communications
• Architecture model reuse and maintainability
• Model interoperability among tools
• OMG Timeline
• Plan to issue reqts for the standard in late 05
  or early 06

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SysML / AP-233 Alignment
SysMLTools
ISO 10303/AP-233 NEUTRAL SE DATA EXCHANGE FORMAT
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Systems Engineering Standards Architecture
Frameworks
DoDAF
CADM
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Summary

• SysML is a general purpose language that supports
  the specification, analysis, design,
  verification of complex systems
• SysML is being developed in conjunction with
  related systems engineering and architecture
  framework standards
• Part of the OMG Model Driven Architecture
  Standards
• ISO AP-233 data interchange standard
• UML Profile for DoDAF initiative
• Planned adoption of SysML v1.0 to begin end of
  2005

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References

• UML for SE RFP
• OMG doc ad/03-03-41
• SysML V0.9 (refer to www.sysml.org)
• OMG Doc ad/05-01-03
• UML2 2003 UML 2 Superstructure (Final Adopted
  Specification)
• OMG doc ptc/03-08-02
• UML2 2003 UML 2 Infrastructure (Final Adopted
  Specification)
• OMG doc ptc/03-09-15
• INCOSE 2004 Symposium Paper Extending UML to
  Support a Systems Modeling Language S.
  Friedenthal, C. Kobryn
• INCOSE 2003 Symposium Paper Extending UML from
  Software to Systems S. Friedenthal, R.
  Burkhart
• INCOSE Insight (June 2004)
• Bock 2003 "UML 2 Activity Model Support for
  Systems Engineering Functional Flow Diagrams,"
  Journal of INCOSE Systems Engineering, vol. 6,
  no. 4, October 2003 C. Bock

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Further Info

• Web
• www.sysml.org
• Chairs
• Cris Kobryn
• cris.kobryn_at_telelogic.com cris_at_sysml.org
• Sandy Friedenthal
• sanford.friedenthal_at_lmco.com sandy_at_sysml.org