1. Nicholas J. Di Liberto 20 June 2011
Integrating MBSE into a Multi-Disciplinary Engineering Environment: A Test Engineering Perspective
Nicholas J. Di Liberto
20 June 2011

2. MBSE and Test Provides Early Confidence in Test Approach
Requirements
Design
Integrate
Test
Test bookends the program
Starts with determining how the requirements will be evaluated
Ends with evaluating the requirement to verify the system design and implementation
Model driven engineering helps reduce risk
Test program can be dynamically updated as the design matures (both at the system and lower levels)
Using performance/functional design models, test approaches can be evaluated prior to hardware availability

3. A Good Test Approach Shows Total Impact of Any Change
Traceability
There should be a reason for everything in a test approach
Requirements, integration steps, test environment should all trace back to a customer need/requirement
Ability to be understood by many different stakeholders
There are many stakeholders on a program, each with their own wants out of the tests
Program Office worries about cost and schedule
System Architects and System IT&E, worry about technical compliance
Customers worry about system compliance and verification
Being able to provide answers to everyone is a daunting task
Especially trying to sync all those documents
Need to coordinate with Fred Simpson, to make sure this consistent with current I&T thoughts.

4. Model Driven Test Links Requirements, Design, Performance and Back
Test Design Models
Adding to the system descriptive models…
Test Flows
Test Set/Environments
Test Procedures
Using the system model as the foundation
Performance/Functional Modeling
Utilizing existing design models to…
Determine system behavior
Understand interfaces
Red line test procedures
Traceability
Tracing those elements back to the requirements, test cases, and use cases

5. Obstacles to Model Driven Testing Can Be Overcome
Test Model
System Design
SysML
Software Design
UML
Hardware Models
ADS
ModSim
System Performance Model
Matlab
Simulink,
Excel
Requirement Model
Doors
Every discipline has it own set of tools
Being able to leverage them in test is difficult, but achievable
Managing the model requires a disciplined program
Responsibilities, and ownership need to be developed early, and maintained throughout the program life cycle

6. As systems get more complex, test follows suit
Model Based Test Approaches for a Program Reduces Risk and Increases Confidence
As systems get more complex, test follows suit
By using already developed models and adding to them, the test approach can adapt with the system design
System and low level design models are increasing in fidelity
Allowing for them to stand in for the hardware
Every element in a test approach can be traced back to a “why”… a requirement
Providing rational for the need for each part
Providing greater visibility to see the impact of any change