From Requirements to Test Cases - Applying a Functional Hierarchy and Modularity for a better Transparency

Abstract

Test cases of conformity tests cover all desired testable requirements from a system specification. Related requirements mostly are spread over different chapters. This paper presents a new hierarchical approach for the test case generation taking advantage of hierarchical approach differentiating principle, functional and procedural requirements of the system requirements specification for the European Train Control System. Benefits of the approach are more modular and focused test cases, easier to be updated and closer to the structure of the system requirements. First results of the application of the approach during the version change from Baseline 2 to 3 of ETCS are depicted.