What are the things to be noted or considered if a software which was initially treated as DAL C and later wanted to be considered as DAL A?

  • 1
    $\begingroup$ Read DO-178C and look for the different requirements between level A and C. $\endgroup$
    – Daniel K
    Jun 24, 2018 at 16:27
  • 3
    $\begingroup$ This question is understood by software developers familiar with certification requirements. $\endgroup$
    – Pilothead
    Jun 26, 2018 at 12:33

1 Answer 1


The main difference in effort is in the amount of verification required.

Design Assurance Level (DAL) C only requires statement coverage whereas DAL A requires MC/DC coverage.

Some of the DO-178C objectives have to be meet with independence where they didn't need to be previously, and some life cycle data goes from CC2 to CC1.

I would suggest looking at the objective tables A1-A10 in DO-178C


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.