Jinghua Sun¹, Samuel Edwards², Nic Connelly³, Andrew Bridge⁴ and Lei Zhang¹, ¹COMAC Shanghai Aircraft Design and Research Institute, China, ²Defence Aviation Safety Authority, Australia, ³RMIT University, Australia, ⁴European Union Aviation Safety Agency, Germany

functionality for aircraft. Highly complex software, however, cannot be exhaustively tested and only assured through a structured, process, activity, and objective-based approach. This paper studied the development processes and objectives applicable to different software levels based on RTCA/DO-178C, and identified 82 technical focus points based on each airborne software development sub-process, then created a Process Technology Coverage matrix to demonstrate the technical focuses of each process. This paper proposes an objective-oriented top-down and bottom-up sampling strategy for the four software Stage of Involvement reviews by considering the frequency and depth of involvement. Finally, this paper provides a Technology Objective Coverage matrix, which can support the reviewers to perform the efficient risk-based SOI reviews by considering the identified technical points, thus efficiently achieving confidence in the level of safety of the aircraft from the software assurance perspective.

Airborne Software, Stage of Involvement, DO-178C, Safety Critical Software Oversight.