Design Reviews: Formal Quality Gates, Review RACI & DHF Records
Systematic architecture and design review gates, Design Quality Checklist, attendee role responsibilities, and auditable DHF review records.
Formal Design Review Gates: Peer Verification Before Code Execution
A formal design review is a disciplined evaluation where engineers, architects, and quality officers systematically evaluate proposed architecture before implementation begins. Under FDA 21 CFR §820.30(e) and ISO 13485 Clause 7.3.5, formal design reviews are mandatory quality milestones that verify design outputs satisfy input requirements and risk controls.
Design Review Attendee Roles & Responsibilities
Author / Lead Designer
Presents the architecture, explains tradeoffs made, and demonstrates traceability back to user requirements.
Independent Reviewer
A qualified senior engineer with zero direct authorship of the design; evaluates edge cases and failure modes.
Quality / Regulatory Officer
Verifies regulatory standards (ISO 13485, ISO 14971 Risk Management) and signs the official DHF review record.
The Four-Pillar Design Quality Checklist
1. Structural Integrity
- Subsystem boundaries are cleanly partitioned with single responsibility.
- Component dependencies flow in one direction with zero cyclic circular imports.
- Shared data models and entities are version-controlled with explicit schema contracts.
2. Behavioral & Concurrency Safety
- State machines have explicit transitions with no undefined fallback states.
- Asynchronous workflows implement timeout limits, backoff retry policies, and dead-letter queues.
- Critical database operations enforce transaction rollback guarantees upon failure.
3. Maintainability & Testability
- Core business calculation logic is isolated from database and third-party network SDKs.
- Code adheres to SOLID principles and avoids bloated "God Object" utility classes.
- Components expose public interface ports suitable for in-memory mock testing.
4. Regulatory & Security Compliance
- Every design element maps directly back to an approved Software Requirement (SRS).
- Security boundaries enforce TLS 1.3 encryption, input validation, and least-privilege RBAC.
- Formal Design Review Record is signed and archived in the Design History File (DHF).
DHF Design Review Record Signing Template
Use this prompt to execute a formal Design Quality Review of an architecture specification:
Community Discussion & Feedback
Attributed peer feedback and official Netspective architecture notes.