EARS PRD authoring

EARS patterns

• Ubiquitous: The system shall <response>.
• Event-driven: When <trigger>, the system shall <response>.
• State-driven: While <state>, the system shall <response>.
• Optional: Where <condition>, the system shall <response>.
• Unwanted: If <condition>, the system shall <response>.

Output checklist

• PRD-ID (PRD-###)
• satisfies: [ADR-...]
• Requirements labeled REQ-###
• Acceptance criteria per major feature