On January 11,, we, the Federal Aviation Administration (FAA), published Advisory Circular (AC) B recognizing RTCA/DOB, Software. FAA Underestimated Complexity of Proving the Integrity Requirement SAE ARP /, RTCA DOB; Consists of Audits/Reviews of. [5] FAA AC B, RTCA DOB – FAA policy which invokes RTCA [6] RTCA DOB/EUROCAE EDB, Software Considerations in Airborne Systems.

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DOB Interview Questions | AeroSpace

Safety attributes in the design and as implemented as functionality must receive additional mandatory system safety tasks to drive and show objective evidence of meeting explicit safety requirements. This process handles problem reports, changes and related activities.

The rigor and detail of the certification artifacts is related to the software level. DOB defines five software levels based on severity of failure.

Please list those type of questions also. A third party tool can be qualified as a verification tool, but development tools must have been developed following the DO process.

These activities are defined by the project planners as part of the Planning process. The FAA applies DOB as the document it uses for guidance to determine if the software will perform reliably in an airborne environment, [1] when specified by the Technical Standard Order TSO for which certification is sought. The FAA approved AC C [4] on 19 Julmaking DOC a recognized “acceptable means, but not the only means, for showing compliance with the applicable airworthiness regulations for the software aspects of airborne systems and equipment certification.

Analysis of all code and traceability from tests and results to all requirements is typically required depending on software level. The industry expects the final package —DOC— to be released in the first quarter of and be mandated six to nine months after ratification. DOB, Software Considerations in Airborne Systems and Equipment Certification is a guideline dealing with the safety of safety-critical software used in certain airborne systems.


Simply put a CC1 item needs to be tracked where as a CC2 item needs to be stored.

Your email address will not be published. Archived from the original on 19 July There are many possible and acceptable fsa for a real project to define these aspects. Removal of the errors is an activity of the software development processes. DOC alone is not intended to guarantee software safety aspects. Please go through the required information in this website only.

DO178B Interview Questions

Processes are described as abstract areas of work in DOB, and it is up to the planners of a real project to define and document the specifics of how a process will be carried out. The phrase “with independence” refers to a separation of responsibilities where the objectivity of the verification and validation processes is ensured by virtue of their “independence” from the software development team.

This page was last edited on 27 Augustat DO requires a documented connection called a trace between the certification artifacts. We derive ffaa requirements by delving into the details of the user requirement.

DOC – Wikipedia

The certification authorities require and DOB specifies the correct DAL be established using these comprehensive analyses methods to establish the software level A-E. FAA lists DOB as a means of compliance that is acceptable to the regulators of software in the avionics community.

Typically IEEE STD Software Safety Plans are allocated and software safety analyses tasks are accomplished in sequential steps requirements analysis, top level design analysis, detailed design analysis, code level analysis, test analysis and change analysis.

Views Read Edit View history. Archived copy as title Use dmy dates from August Software can automate, assist or otherwise handle or help in the DOB processes. Therefore, DOB central theme is design assurance and verification after the prerequisite safety requirements have been established.


The software level is determined after system safety assessment and the safety impact of software is known. From Wikipedia, the free encyclopedia.

Tools used to verify the code simulators, test execution tool, coverage tools, reporting tools, etc. Advances in systems safety: Retrieved from ” https: Tools generating embedded code are qualified as development toolswith the same constraints as the embedded code. The number of objectives to be satisfied some with independence is determined by the software level A-E.

Hope I answered your question, if you not clear please revert. The additional clarification fills a gap that a software developer may encounter when interpreting the document. Hi Venkat, Thanks for visiting the site!! The certification authorities require and DOC specifies the correct DAL be d1o78b using these comprehensive analyses methods to establish the software level A-E.

DOC will contain more details on software modeling and the potential ability to use modeling to supplant some of the verification techniques normally required in DOB. Failure conditions which would reduce the capability of the fas or the ability of the crew. Retrieved from ” https: Requirements traceability is concerned with documenting the life of a requirement.

It is the software safety analyses that drive the system safety assessments that determine the DAL that drives the appropriate level of rigor in DOB. I have seen some interview questions like why to follow DO, what happens if not followed and is it mandatory to follow the each and everything in DO