TRD Creation — Architecture Before Implementation

When to use

• PRD passed Gate 1
• Feature Map passed Gate 2 (Full Track only)
• Design Validation passed Gate 1.5 (Small Track) / Gate 2.5 (Full Track) (if feature has UI)
• About to design technical architecture

Skip when

• PRD not validated → complete Gate 1 first
• Design Validation not passed (for UI features) → complete Gate 1.5/2.5 first
• Architecture already documented → proceed to API Design
• Pure business requirement change → update PRD

Sequence