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Using Qualified Tools in a DO-178C Development Process, Part 9: Qualified Test Generation

From the series: Using Qualified Tools in a DO-178C Development Process

Bill Potter, MathWorks

Test coverage of high-level requirements and low-level requirements are objectives in DO-178C. Test coverage of the high-level software requirements is achieved by re-running the simulation cases used to verify the model on the target code. Simulink Test™ provides the capability to then re-run the simulation cases that were run on the model and reuse them to test the executable object code against the high-level requirements. For low-level software requirements coverage, it is necessary to show that all the requirements in the model are covered by testing. Using model coverage, a feature of Simulink Coverage™, it can be shown that many of the low-level requirements in the model are covered by the high-level test cases. Simulink Design Verifier™ is then used to automatically generate tests from the model for only those missing low-level requirements coverage. This is accomplished by inputting the model coverage data into Simulink Deign Verifier and having it ignore the existing coverage for the model. Simulink Coverage provides validation that the missing model coverage is achieved. This validation is necessary because Simulink Design Verifier may perform numeric approximations or use block replacements when generating the tests, so the model coverage is run on the original model, rather than the approximated one. Two reports are provided by the tools: A test generation report from Simulink Design Verifier and a model coverage report from Simulink Coverage. The DO Qualification Kit provides the necessary artifacts to qualify the generation of the model coverage report from Simulink Coverage.

Product Focus

Series: Using Qualified Tools in a DO-178C Development Process

Part 1: Introduction to Model-Based Development for DO-178C Learn how to use of Model-Based Design and formal methods with Simulink, Stateflow, Embedded Coder, and the DO Qualification Kit in a process compliant with DO-178C, DO-331, DO-333, and DO-330.

Part 2: Qualified Model Verification – Requirements Tracing Perform tracing from models to requirements, in compliance with DO-178C and DO-331, using Simulink Requirements, and then generate a design description document using Simulink Report Generator.

Part 3: Qualified Model Verification – Simulation Perform simulation and model coverage analysis to verify models, in compliance with DO-178C and DO-331, using Simulink Test and Simulink Coverage.

Part 4: Qualified Model Verification – Model Standards Perform static analysis to verify model standards, consistency, and accuracy, in compliance with DO-178C and DO-331, using Simulink Check.

Part 5: Qualified Model Verification – Design Errors Perform formal methods analysis to verify model consistency and accuracy, in compliance with DO-178C and DO-333, using Simulink Design Verifier.

Part 6: Qualified Code Verification – Model To Code Use Embedded Coder and Simulink Code Inspector to generate code from models and verify that translation in compliance with DO-178C and DO-331.

Part 7: Qualified Code Verification – Code Standards Use Embedded Coder and Polyspace Bug Finder to generate code from models and verify coding standards in compliance with DO-178C and DO-331.

Part 8: Qualified Code Verification – Code Errors Perform formal methods analysis to verify code consistency and accuracy, in compliance with DO-178C and DO-333, using Polyspace Code Prover.

Part 9: Qualified Test Generation Use Simulink Design Verifier and Simulink Coverage to generate tests from models and verify low-level test coverage, in compliance with DO-178C and DO-331.

Part 10: Qualified Software Testing Use processor-in-the-loop capability and code coverage analysis to verify executable object code, in compliance with DO-178C and DO-331, with Simulink Test and Simulink Coverage.

Part 11: Tool Qualification Qualify MathWorks tools in compliance with DO-178C and DO-330 using the DO Qualification Kit.

Related Products

DO Qualification Kit

Learn more about the DO Qualification Kit

Next in Series

Part 10: Qualified Software Testing

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