DO-248B

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DO-248B
Final Report for Clarification of DO-178B "Software Considerations in Airborne Systems and Equipment Certification"
Latest revision October 12, 2001
Prepared by RTCA SC-190

DO-248B is a document published by RTCA, Incorporated. It provides clarification of the guidance material in DO-178B. Like DO-178B, it is a joint undertaking with EUROCAE and the document is also published as ED-94B "Final annual report for clarification of ED-12B"

The clarification may accomplish any or all of the following purposes:

  • resolution of content errors in DO-178B
  • clarification of a specific section or topic of DO-178B
  • resolution of an inconsistency between DO-178B and any other relevant civil aviation standards

Outline of contents[edit]

DO-248B contains the following:

  • 12 errata to DO-178B
  • 76 frequently asked questions (FAQ)
  • 15 discussion papers
    • Verification Tool Selection Considerations
    • The Relationship of DO-178B/ED-12B to the Code of Federal Regulations (CFRs) and Joint Aviation Requirements (JARs)
    • The Differences Between DO-178A/ED-12A and DO-178B/ED-12B Guidance for Meeting the Objective of Structural Coverage
    • Service History Use—Rationale for DO-178B/ED-12B, Section 12.3.5a through k
    • Application of Potential Alternative Methods Compliance for Previously Developed Software (PDS)
    • Transition Criteria
    • Definition of Commonly Used Verification Terms
    • Structural Coverage and Safety Objectives
    • Certification With Known Software Problems
    • Considerations Addressed When Deciding to Use Previously Developed Software (PDS)
    • Qualification of a Tool Using Service History
    • Object Code to Source Code Traceability Issues
    • Definitions of Statement Coverage, Decision Coverage, and Modified Condition/Decision Coverage (MC/DC)
    • Partitioning Aspects in DO-178B/ED-12B
    • Relationship Between Regression Testing and Hardware Changes

See also[edit]