1. The document discusses using Model Based System Engineering (MBSE) approaches in flight testing. 2. It provides background on MBSE and SysML modeling language and examples of how they can be applied to represent different aspects of a flight test including requirements, structure, behavior, and operations. 3. The use of MBSE and SysML in flight testing is presented as a natural extension of these modeling approaches that are increasingly being used in system acquisition and design.

1. Using Model Based System
Engineering (MBSE) in Flight Test
CSER 2011
Frank C. Alvidrez
Senior NetCentric Flight Test Engineer
Modern Technology Systems Inc.
Using MBSE in Flight Test

2. Thought for the day
“Any intelligent fool can make
things bigger and more complex...
It takes a touch of genius --- and a
lot of courage to move in the
opposite direction.”
Guidance for MBSE?
Using MBSE in Flight Test

3. Topics
• Background & Introduction
• Why are we here?
• MBSE Applications in
Aerospace
• SysML & Enterprise
Architectures
• DoDAF & SysML
• Flight Test Domain
• MBSE Techniques in Flight
Test
Using MBSE in Flight Test 10/16/2010, Chart 3

4. Background & Introduction
• Some Acknowledgements
– INCOSE/OMG
– USC
– DAU
– USAF
– NoMagic
– FEAC / Zackman
• Some Caveats
– Not an official USAF or USG presentation
– All Material is available on line through DAU, OMG,
DoD and other public sources

5. Why Models?
• Building a model of the system is a natural
engineering approach to describing its design,
function and how it relates to the outside world
• Model Based System Engineering (MBSE) is
about using models to describe the system and
the SE process.
• Flight Test is part of the System Engineering
Process
• MBSE approach to Flight Test is a natural
extension of the modeling approach to design.

6. Model Based System Engineering
• MBSE, an INCOSE Initiative from the early
2000’s in conjunction with the OMG
• State of Practice in 2006 – Pockets across the
industry, not fully integrated into SE process,
standards emerging (SysML, AP233, BPMN,
UPDM)
• UML Approach to the DoDAF/MODAF (UPDM)
– Started in 2005 with DoDAF 1.0 and MODAF 1.1
– Now fully integrated in UPDM with DoDAF 2 and
MODAF V1.2
• Significant Tool Vendor Activity
Using MBSE in Flight Test 10/16/2010, Chart 6

7. MBSE & The Test Domain
• MBSE Rapid rise in development
programs for hardware/software and
enterprise processes
• Applications of MBSE in the test domain
are not as prevalent.
• What are the benefits to test?
− Same as development efforts
− Model of the Test Enterprise (aid to
communication)
− Complexity: Help to decompose the test
effort
− Early Identification of critical test
requirements
− Discipline to the Test Process
− Re-use

8. Test Domain
10/16/2010, Chart 8
Using MBSE in Flight Test

9. What is SysML?
•It is a modeling language
UML not required UML reused SysML extensions
by SysML by SysML to UML
UML 2 SysML
SysML provides a means to capture the system modeling
information as part of an MBSE approach
Abstract/Paper Title Here 10/16/2010, Chart 9

10. Review of SysML
10/16/2010, Chart 10
Using MBSE in Flight Test

11. MBSE - Four Pillars
Structure
• Block
• Internal Block
Behavior
• Use Case
• Activity
• State Machine
• Sequence
Requirements
• Functional
• Non-functional
Parametric

12. Developmental Flight Test
in the Acquisition Process
DT OT
Source: AFI 99-109
Using MBSE in Flight Test 10/16/2010, Chart 12

13. Model Based System
of Systems Engineering
OV-1
Source: DARPA J-UCAS Program
Using MBSE in Flight Test

14. Example Block Diagram – Domain Model
Using MBSE in Flight Test 10/16/2010, Chart 14

15. Example OV-1 – High Level Ops Concept
Graphic
10/16/2010, Chart 15
Using MBSE in Flight Test

16. Example OV-2 J-JUCAS
Using MBSE in Flight Test

17. Example Test OV-2
Using MBSE in Flight Test 10/16/2010, Chart 17

18. Example Block Diagram
– System Design
10/16/2010, Chart 18
Using MBSE in Flight Test

19. Example Use Case – Launch Prep
10/16/2010, Chart 19
Using MBSE in Flight Test

20. Example Use Case – Deck Launch
10/16/2010, Chart 20
Using MBSE in Flight Test

21. Example Activity Diagram
Using MBSE in Flight Test 10/16/2010, Chart 21

22. Summary
• Application of MBSE & SysML is rapidly
increasing in the acquisition and design
domains
• Involvement of Testing earlier in the life cycle
is necessary to meet budget constraints &
reduce cost overruns.
• The use of modern tools such as MBSE &
SysML (along with DoDAF, UPDM) can benefit
the test community as it has for acquisition
and development, especially in light of testing
of more complex systems (and SoS)
Using MBSE in Flight Test 10/16/2010, Chart 22