DO-278A stands as a guiding force for ensuring the integrity and safety of software within non-airborne CNS/ATM systems. In synergy with DO-178C, it provides recommendations and a robust framework to instill confidence in the safety of on-ground software. Relation between DO-278A and DO-178C DO-278A and DO-178C share essential supplements, such as DO-331 (Model-Based Development), DO-332