Usability requirements for requirement engineering tools

Requirement engineering (RE) tools are necessary for several reasons: they allow engineers to manage an increasing amount of information, to maintain traceability between requirements, solution and tests, and to evaluate requirement change impact on the solution and test.\\This article proposes an analysis of system engineering practices in the aeronautical industry, with a focus on requirement engineering. From contextual interviews, we have identified scenarios reflecting system engineers's activity related to the editing and management of requirements. The analysis of these scenarios has allowed us to elicit usability requirements for RE tools, more precise than \"user-friendly\". These usability requirements will feed our future work on RE tool design.