An Approach to Maintaining Safety Case Evidence After A System Change
This addresses safety-critical system development, but it is incremental as it builds on existing safety case practices.
The paper tackles the problem of maintaining safety case evidence after system changes by proposing a method to highlight the impact of changes, facilitating easier updates.
Developers of some safety critical systems construct a safety case. Developers changing a system during development or after release must analyse the change's impact on the safety case. Evidence might be invalidated by changes to the system design, operation, or environmental context. Assumptions valid in one context might be invalid elsewhere. The impact of change might not be obvious. This paper proposes a method to facilitate safety case maintenance by highlighting the impact of changes.