Continuous Integration

Continuous Integration is a systematic development practice where software engineers merge code updates into a shared repository frequently and a software build is triggered by this merge.

By automating the build and testing process, organizations can detect integration conflicts early and maintain a consistent baseline for safety-critical components. Continuous Integration serves as the foundation for modern software safety lifecycles by providing a controlled environment for software evolution.

The ISO 26262 standard demands rigorous evidence that software requirements are met and verified. Continuous Integration supports these goals by executing automated test suites and static analysis tools every time the source code changes. The results generated by CI create a continuous audit trail of test results and verification reports.

Software tools used in a Continuous Integration pipeline must undergo an evaluation according to ISO 26262-8, Clause 11. Since these tools automate the verification of safety functions, an undetected tool error could lead to an unsafe product. If a CI tool fails to report a failed test case, the safety manager might wrongly assume the software is safe.

Validas assists companies in determining the Tool Impact and Tool Error Detection capabilities of their CI environment. This assessment determines the Tool Confidence Level and whether qualification with COSAFE is applicable.

COSAFE combines use-case Qualification Packages in form of a Qualification Kit (QKit). This allows you to generate standard-compliant documentation and can be integrated into CI environments to monitor qualification status automatically. Ensuring the integrity of the CI toolchain with COSAFE is one established approach to building trust in the automated results it produces.

Continuous Integration provides safety managers with real-time data regarding the quality and maturity of the software. It replaces manual, error-prone status updates with automated dashboards that track code coverage and requirement fulfillment.

In highly regulated sectors like rail (EN 50128) or aerospace (DO-178C), this transparency is critical for maintaining the safety argument. The CI system enforces a standardized workflow that ensures every piece of code undergoes the same rigorous checks before it is considered for a release. This consistency reduces the risk of human oversight and ensures that the development process adheres to the planned safety manual.

The automotive industry now requires adherence to ISO/SAE 21434 for cybersecurity alongside functional safety. Continuous Integration allows for the simultaneous execution of safety tests and security scans. This "DevSecOps" approach ensures that software updates do not introduce vulnerabilities like buffer overflows or unauthorized access points while fixing safety issues. Automated scripts within the CI pipeline can check for known software vulnerabilities and enforce secure coding practices across the entire development team. By unifying these checks, manufacturers can ensure that their vehicles are both functionally safe and resilient against cyber threats through a single, qualified automation framework.