DO-254 does not apply to Level E Design Assurance. If the system safety assessment arrives with such DAL, then no further objectives is needed.
For Design Assurance Level D and C (DAL-D and DAL-C), all System Level and High Level HW requirements need to be covered via requirements-based-testing.
For DAL-B and DAL-A; in addition to High Level Requirements coverage as (DAL-D & C), there needs to be coverage of low level requirements as well as Advanced Analysis. Advanced Analysis is similar to software structural coverage.
DO-254 does not apply to Level E Design Assurance. If the system safety assessment arrives with such DAL, then no further objectives is needed.
For Design Assurance Level D and C (DAL-D and DAL-C), all System Level and High Level HW requirements need to be covered via requirements-based-testing.
For DAL-B and DAL-A; in addition to High Level Requirements coverage as (DAL-D & C), there needs to be coverage of low level requirements as well as Advanced Analysis. Advanced Analysis is similar to software structural coverage.