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MBSE [Model-Based Systems Engineering], DBSE [Document-Based Systems…
MBSE
[Model-Based Systems Engineering]
life cycle activities
not immediate output of life cycle; not the primary artifact
integrated, coherent and consistent system model
dedicated systems modelling tool
definition
MBSE is the formalized application of modelling to support system requirements, design, analysis, verification and validation activities beginning in the conceptual design phase and continuing throughout development and later life cycle phases.
examples
UML for softwares
3D CAD for Mechanical
purpose of MBSE
Communications
specification and design precision
system design integration
re-use of system artifacts
produced a system model containing model repository
system model includes system specification, design, analysis and verification information
the system model can provide a more complete, consistent and traceable system design
enhancing the quality of traceability and change impact assessments
system model
what is system model?
a logical representation of a system, entity, phenomenon or process
A simplified representation of a system at some particular point as to promote the understanding of the system
example of a system model
solar system
railway of singapore
house floorplan or blueprint
Advantages
to enhance communication between designer and developer
purpose
defining the expected results of the modelling effort, stakeholders who use the results and how the result is being used.
to determine the scoop of the modelling effort in terms of model breadth, depth, and fidelity.
balanced properly with the available schedule, budget, skill levels and other resources
why modelling a system?
characterize an existing system
specify and design a new or modified system
evaluate the system
train users on how to operate or maintain a system
benefits
enhancing the ability to capture, analyse, share and mange the information associated with the complete specification of a product, resulting
improved product quality
improve ability to teach and learn system engineering fundamentals
enhancing knowledge capture and reuse of the information
3 pillars of MBSE
modelling language
modelling tool
modelling method
DBSE
[Document-Based Systems Engineering]
subset of artifacts
concept of operation (ConOps) documents
requirements specifications
System Design Specification
Test Case Specification
format
text document
spreadsheets
diagram
presentation
people involved
customers
users
developers/testers
generation of textual speciation
Design Documents
neagative impact
difficult to assess since the information is spread across several documents
difficult to perform traceability
difficult to perform to assess change impacts