Abstract
This chapter discusses the development of safety critical applications as well as on overview of the DO- 178B or “Software Considerations in Airborne Systems and Equipment Certification” process. Software plays a major role in safety critical applications from fly-by-wire airplanes, automobile computers, and cruise ship controls to controlling power plants and medical devices. Software can be at various levels of criticality. The DO-178B standard is one of the most stringent standards imposed on the software development industry. This aerospace guideline has been used to help in the development of similar standards in other fields of application such as the nuclear power, military, rail/automotive transportation, and medical industries where reliability, dependability and safety are required in the software development process. DO-178B is process oriented and places additional emphasis on verification rather than just testing. It also includes focus on requirements based testing and structural coverage. The DO-178B guidelines describe techniques and methods appropriate to ensure that software's integrity and reliability can be ultimately certified and approved by the FAA. The guidelines categorize software levels based on their failure condition severity.
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