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The emergence of a global market for urban air mobility and unmanned aerialsystems has attracted many startups across the world. These organizations havelittle training or experience in the traditional processes used in civilaviation for the development of software and electronic hardware. They are alsoconstrained in the resources they can allocate for dedicated teams ofprofessionals to follow these standardized processes. To fill this gap, thispaper presents a custom workflow based on a subset of objectives derived fromthe foundational standards for safety critical software DO-178C/DO-331. Theselection of objectives from the standards is based on the importance, degreeof automation, and reusability of specific objectives. This custom workflow isintended to establish a lean and highly automated development life cycleresulting in higher quality software with better maintainabilitycharacteristics for research and prototype aircraft. It can also be proposed asmeans of compliance for software of certain applications such as unmannedaircraft systems, urban air mobility and general aviation. By producing theessential set of development and verification artifacts, the custom workflowalso provides a scalable basis for potential future certification in compliancewith DO-178C/DO-331. The custom workflow is demonstrated in a case study of anAutopilot Manual Disconnection System.

A Lean and Highly-automated Model-Based Software Development Process Based on DO-178C/DO-331