Chip lifecycle / Avionics lifecycle / Hardware and Software Requirements

Hardware and Software Requirements

Capturing the hardware requirements for each programmable device, ASIC and circuit board and the software high-level requirements, each traced up to the allocated system requirements, with derived requirements identified and returned to the safety assessment, and validated as correct and complete before design commits to them.

Where this stage sits

This stage with its neighbours. Each row is a discipline active here, shaded by how mature its work is by the end of each stage.

Stage

^A02 Certification Planning

^A03 Hardware and Software RequirementsYou are here

^A04 Conceptual Design and Architecture

Certification, program and supply milestones

Hardware and software assurance milestones

DAAssurance levels assigned TFTR1TR1: Technology feasibility PSPlans submitted RBRequirements baselined CDConceptual design baselined

Program and certification management^A

0.3

0.5

Systems engineering and safety assessment^AO

0.3

0.5

Airborne electronic hardware design^A

0.3

0.5

Airborne software development^A

0.3

0.5

Hardware validation and verification^D

0.3

0.5

Software verification^D

0.3

0.5

Process assurance and quality^A

0.3

0.5

Configuration and change management^A

0.3

0.5

Tools and design environment^O

0.3^O

0.5

Environmental qualification and compliance^A

0.0

0.3

0.5

Components, supply and export^A

0.3

0.5^A

Key0.0Planned0.3Early draft0.5Draft0.8Feature complete1.0CompleteFreezeFrozenFaded block: still at the step shown before it, Held below Complete or Maintained under change control once complete or frozenFreeze or sign-off pointMilestone for one item; the rest of the work carries onMilestone gateTRTechnical readiness review (TR): a gate that checks the technology is ready before the next commitment.You are here: Hardware and Software RequirementsAI impactDisruption (red)Augmentation (blue)Opportunity (green)How AI is changing the workWhat the steps mean What the codes mean

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Stages

Certification Planning^A
Hardware and Software Requirements (this stage)^A
Conceptual Design and Architecture^A

Certification, program and supply milestones

Hardware and software assurance milestones

Assurance levels assigned (DA)
TR1: Technology feasibility (TF) (technical readiness review TR1)
Plans submitted (PS)
Requirements baselined (RB)
Conceptual design baselined (CD)

Disciplines

Program and certification management^A
- Certification Planning: maturity 0.3, Early draft. Certification plans submitted and the planning review held with the authority or the integrator; its findings are being closed.
- Hardware and Software Requirements: maturity 0.3, Early draft. Certification plans submitted and the planning review held with the authority or the integrator; its findings are being closed.
- Conceptual Design and Architecture: maturity 0.5, Draft. Plans accepted; liaison follows the design through the design review, whose findings are recorded and closed.
Systems engineering and safety assessment^AO
- Certification Planning: maturity 0.3, Early draft. Preliminary system safety assessment started against the plans, with the independence and fault tolerance assumptions listed.
- Hardware and Software Requirements: maturity 0.5, Draft. Derived requirements reviewed for safety and the preliminary assessment updated with the conceptual design's partitioning and independence.
- Conceptual Design and Architecture: maturity 0.5, Draft. Derived requirements reviewed for safety and the preliminary assessment updated with the conceptual design's partitioning and independence.
Airborne electronic hardware design^A
- Certification Planning: maturity 0.3, Early draft. Hardware design plan and design standards released, and the device technology shown feasible for the assurance level.
- Hardware and Software Requirements: maturity 0.5, Draft. Hardware requirements baselined and traced to the system requirements; the conceptual design, device choice and component set reviewed against them.
- Conceptual Design and Architecture: maturity 0.5, Draft. Hardware requirements baselined and traced to the system requirements; the conceptual design, device choice and component set reviewed against them.
Airborne software development^A
- Certification Planning: maturity 0.3, Early draft. Software development plan and the requirements, design and code standards released.
- Hardware and Software Requirements: maturity 0.5, Draft. High-level requirements baselined and traced to the system requirements; the software architecture defined and reviewed against them.
- Conceptual Design and Architecture: maturity 0.5, Draft. High-level requirements baselined and traced to the system requirements; the software architecture defined and reviewed against them.
Hardware validation and verification^D
- Certification Planning: maturity 0.3, Early draft. Hardware validation and verification plans released: methods, independence and the advanced methods the assurance level calls for.
- Hardware and Software Requirements: maturity 0.5, Draft. Requirements validated and the trace data started; verification procedures, test benches and checkers written against the baselined requirements.
- Conceptual Design and Architecture: maturity 0.5, Draft. Requirements validated and the trace data started; verification procedures, test benches and checkers written against the baselined requirements.
Software verification^D
- Certification Planning: maturity 0.3, Early draft. Software verification plan released: review, analysis and test methods, independence and the structural coverage the assurance level calls for.
- Hardware and Software Requirements: maturity 0.5, Draft. Reviews of the high-level requirements and architecture held; test cases and procedures written against the requirements.
- Conceptual Design and Architecture: maturity 0.5, Draft. Reviews of the high-level requirements and architecture held; test cases and procedures written against the requirements.
Process assurance and quality^A
- Certification Planning: maturity 0.3, Early draft. Process assurance and software quality assurance plans released, with the transition criteria each process must meet.
- Hardware and Software Requirements: maturity 0.5, Draft. Audits of the requirements and design processes under way, with the transition criteria checked at the requirements and conceptual design baselines.
- Conceptual Design and Architecture: maturity 0.5, Draft. Audits of the requirements and design processes under way, with the transition criteria checked at the requirements and conceptual design baselines.
Configuration and change management^A
- Certification Planning: maturity 0.3, Early draft. Configuration management plan released, with the plans and standards under control and problem reporting set up.
- Hardware and Software Requirements: maturity 0.5, Draft. Requirements and conceptual design baselines under change control, with problem reports raised and tracked.
- Conceptual Design and Architecture: maturity 0.5, Draft. Requirements and conceptual design baselines under change control, with problem reports raised and tracked.
Tools and design environment^O
- Certification Planning: maturity 0.3, Early draft. Every design and verification tool assessed, and the qualification approach for tools whose output is not verified agreed in the plans.^O
- Hardware and Software Requirements: maturity 0.5, Draft. Tool qualification under way for the tools that need it, and the design environment versions recorded.
- Conceptual Design and Architecture: maturity 0.5, Draft. Tool qualification under way for the tools that need it, and the design environment versions recorded.
Environmental qualification and compliance^A
- Certification Planning: maturity 0.0, Planned. Qualification lead named, the installation and its likely environmental and electromagnetic categories identified with the aircraft or system maker, and the test effort and laboratories estimated; nothing set in the equipment specification yet.
- Hardware and Software Requirements: maturity 0.3, Early draft. Environmental categories and the electromagnetic and lightning levels for the installation set in the equipment specification; the qualification approach outlined.
- Conceptual Design and Architecture: maturity 0.5, Draft. Equipment qualification plan released with the conceptual design, and the detailed design analysed for thermal, electromagnetic and reliability margins.
Components, supply and export^A
- Certification Planning: maturity 0.3, Early draft. Electronic component management plan released, with the critical parts, technology and obsolescence risks outlined.
- Hardware and Software Requirements: maturity 0.3, Early draft. Electronic component management plan released, with the critical parts, technology and obsolescence risks outlined.
- Conceptual Design and Architecture: maturity 0.5, Draft. Component selection list issued for the conceptual design, with obsolescence and counterfeit risk reviewed for each part.^A

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