hardware-planninglisted

# DO-254 Hardware Planning (avionics/do254/hardware-planning) Use when the task is DO-254 design assurance planning for airborne electronic hardware: classifying the item and scoping its assurance data. ## Domain quick reference - DO-254 distinguishes simple from complex airborne electronic hardware (AEH). Complex AEH (programmable logic, processors, significant internal state, or hardware whose correct behavior cannot be fully established from top-level data alone) follows the full design assurance process. - Safety-significant items are treated as complex unless a documented justification shows a reduced process is adequate. - Complex AEH planning: PHAC plus requirements capture, conceptual and detailed design, verification, configuration management, and process assurance data. - Simple AEH uses a reduced but still planned process: a hardware plan, verification, and configuration management. - DO-254 is accepted via FAA AC 20-152A. ## Workflow 1. Classify the item: simple or complex AEH. 2. Complex: scope the PHAC and the full design assurance data set. 3. Simple: scope the reduced process (still planned, still verified). 4. Plan requirements capture, verification, and configuration management for the item. 5. Confirm the classification with the certification authority early. ## Pitfalls - Calling an FPGA or processor item "simple" without justification. - Skipping verification for simple AEH (reduced is not none). - No PHAC for complex AEH. - Clas