从DO-178C的新变化透视软件适航关注点

深刻理解DO-178C标准对于提升机载软件开发能力具有重要意义。分别从软件生存周期过程活动和过程目标两个维度对比和分析DO-178C与DO-178B的差异,按照计划过程、开发过程、验证过程、配置管理过程、质量保证过程和合格审定联络过程分类,列举了每个过程新增的或变更的考虑内容,并详细分析了过程目标的变化。根据差异分析,从强调以目标为中心、源代码到目标码的映射、参数数据、双向追踪、基于需求的鲁棒性测试和耦合性验证6个方面解析了DO-178C强调的思想,并总结了一些可行的实践。

Study on Airworthiness Concerns of Changes of DO-178 C

It is important to in-depth understanding DO -178 C for significant improving the capability of airborne software development .The differences between DO-178 C and DO-178 B are analyzed from two dimensions ,the software life cycle process dimension and the objective dimension .The added or modified contents about the airworthiness consideration are listed and analyzed based on the divided processes , such as plan process ,development processes ,configuration management process ,quality assurance process and certification liaison process .The changes of process objectives are also analyzed in details .The em-phasized ideas in DO -178 C are addressed which includes objective oriented , mapping between source code and executive object image ,parameter data ,bi-directional traceability ,requirement based robust test and coupling verification .Some feasible practices are provided based on forgoing analysis .