Major differences between DO-178B and DO-178C?
objectives: DO-178B has 66 objectives. DO-178C has 71 objectives.(3 new objectives added in software verification process, 2 new objectives in software quality assurance process.)
Outputs: DO-178B has 20 outputs. DO-178C has 22 outputs. (21.traceability data, 22.parameter data item (PDI))
supplements: DO-178B has no supplement documents. DO-178C has 4 new supplement documents