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DO-178B, Software Considerations in Airborne Systems and Equipment Certification is a guideline dealing with the safety of safety-critical software used in certain airborne systems. It was jointly developed by the safety-critical working group RTCA SC-167 of the Radio Technical Commission for Aeronautics (RTCA) and WG-12 of the European ...
For a generic DO-178C based process, Stages of Involvements (SOI) are the minimum gates that a Certification Authority gets involved in reviewing a system or sub-system as defined by EASA on the Certification Memorandum SWCEH – 002: SW Approval Guidelines and FAA on the Order 8110.49: SW Approval Guidelines.
The earliest revisions of the Advisory Circular were brief, serving little more than to call attention to active DO-178 revisions. The Advisory Circular revisions C and D are considerably longer, giving guidance in modifying and re-using software previously approved using DO-178, DO-178A, or DO-178B (preceding revisions of the DO-178 standard).
The FAA further developed this approach in the "Mega" FAA Order 8110.49 Chapter 2, defining the four Stages of Involvement (SOI) Audits as Planning, Development, Verification (Test), and Final. [ 3 ] From 1998 on, the CAST provided informational recommendations in the form of a series of position papers that were neither policy nor guidance ...
During operations, SOI are changed daily. Since the fielding of the SINCGARS system, however, the paper SOI has generally faded from Army use. Electronic SOI are now generated, distributed and loaded along with cryptographic keys. [3] The title SOI was used until the early 1970s and it was changed to CEOI and then changed back to SOI in the 1980s.
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DO-178C and DO-254 define the design assurance objectives that must be accomplished for given DAL. Unlike SIL, it is the case that both ASIL and DAL are statements measuring degree of hazard. DAL E is the ARP4754 equivalent of QM; in both classifications hazards are negligible and safety management is not required.
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