Fda 820 Design Controls

FDA Design Controls and Software Validation (21 CFR 820.30)

Purpose

Map 21 CFR Part 820 Subpart C — Design Controls to software lifecycle work: design planning, inputs, outputs, review, verification, validation, transfer, and DHF/DMR links, including how software validation (intended use / risk controls) complements verification (requirements and specs). Includes a concise ISO 13485:2016 slice where it overlaps QMS expectations for design and risk (interpretation; align with your notified-body MDSAP scope for EU).

When to Apply

• Defining or updating design procedures, DHF artifacts, or release records for US market devices.
• Interpreting “validation” vs “verification” for software in FDA QMS language.
• Connecting IEC 62304 deliverables to 820.30 design control records.
• Preparing for ISO 13485 audits that reference design control (Clause 7.3).

Requirements (testable)

1. Design Plan: Establish and maintain a design and development plan per 820.30(b); scope, responsibilities, interfaces, and review gates; update when software scope or class changes. Rationale: controlled design process.
2. Design Inputs: Capture physical and performance requirements from intended use and safety/risk; trace to 820.30(c) records. Software inputs include functional, safety, security, usability, and regulatory constraints. Rationale: correct inputs drive correct outputs.
3. Design Outputs: Document 820.30(d) outputs (specs, code baselines, build artifacts) that meet design inputs; include acceptance criteria for verification. Rationale: objective evidence of “what was built.”
4. Design Review: Hold 820.30(e) reviews at planned stages; record participants, decisions, and action items for software architecture and major changes. Rationale: defect prevention.
5. Design Verification: Demonstrate 820.30(f) that design outputs meet design inputs (tests, analysis, inspection). Map to unit/integration/system tests and static analysis. Rationale: “did we build it right?”
6. Design Validation: Demonstrate 820.30(g) that approved device meets user needs and intended use under simulated or actual use as appropriate; include risk-related use scenarios. For software, often clinical/ summative usability and end-to-end clinical workflows where applicable. Rationale: “did we build the right thing?”
7. Design Transfer: Ensure 820.30(h) transfer to manufacturing / deployment (including cloud release procedures) with verified procedures and training. Rationale: reproducible release.
8. Design History File (DHF): Maintain 820.30(j) compilation of records for each design or type; link to SDD, tests, reviews, risk file, and change records. Rationale: audit trail.
9. Device Master Record (DMR): Where applicable, ensure 820.181 DMR entries for released software (labels, IFU, build IDs) are consistent with validated design. Rationale: correct field configuration.
10. ISO 13485 alignment (slice): Where QMS is ISO 13485-certified, map 7.3 Design and development and 4.1.6 (software used in QMS) to your procedures; document software validation for GMP/QMS tools per FDA Computer Software Assurance guidance when those tools affect production/quality records. Rationale: single coherent QMS story.

Recommended Practices

• Maintain a one-page 820.30 ↔ IEC 62304 mapping table (SDP ↔ design plan, SOUP ↔ design input/output, etc.).
• Separate verification matrix (REQ→test) from validation summary (intended use / risk / use scenarios).
• Baseline software build IDs in DHF per release.

Patterns

DHF index entry (YAML):

dhf:
  device: "Pump-Controller-SW"
  design_plan_ref: "DOC-DSP-001 rev C"
  inputs_ref: ["REQ-SYS-001", "RMF-2026"]
  outputs_ref: ["SAD-001", "SDD-002", "tag: v2.3.1"]
  verification:
    summary: "reports/VV-REPORT-2.3.1.pdf"
    matrix: "trace/req-test-matrix.csv"
  validation:
    summary: "reports/VAL-SUMMARY-2.3.1.pdf"
    note: "Intended use + clinical workflow scenarios; links to IEC 62366 summative tests if UI"
  reviews:
    - id: "DR-2026-01"
      date: "2026-01-04"
      attendees: ["SE", "QA", "RA"]

Commit message tying to design controls:

feat: door interlock stop within 50 ms

820.30: design output + verification for REQ-62304-102
DHF: VV-REPORT updated; see TEST-201, TEST-202

Anti-Patterns (risks)

• Calling integration tests “validation” only — risk: missing intended use evidence under 820.30(g).
• DHF references only code without inputs/outputs linkage — risk: 483 observations on incomplete design controls.
• Skipping design transfer for cloud/SaaS deployments — risk: production/tenant config drift.

Verification Checklist

• [ ] Design plan current; reviews documented for major software milestones.
• [ ] Design inputs traceable to risks and intended use; approved.
• [ ] Design outputs (specs, builds) linked to inputs; acceptance criteria defined.
• [ ] Verification evidence (tests, analysis) covers design outputs vs inputs.
• [ ] Validation summary addresses user needs / intended use (not only unit tests).
• [ ] Design transfer records exist for manufacturing/deployment.
• [ ] DHF contains or references required records for the software release.
• [ ] DMR/labeling consistent with released software version.

Traceability

• Tag DHF artifacts with release vX.Y.Z; link REQ-* to TEST-* and validation VAL-* or SUM-UE-* (usability).
• Map RISK-CTRL-* to both verification (technical) and validation (use-related) where applicable.

References

• 21 CFR Part 820, Subpart C — Design controls (§820.30).
• 21 CFR Part 820, Subpart M — Records (§820.181 DMR).
• FDA Guidance: “General Principles of Software Validation” (2002) — validation philosophy (interpretation; not superseded for QMS concepts).
• FDA Guidance: “Computer Software Assurance for Production and Quality System Software” (2022).
• ISO 13485:2016, clauses 4.1.6 (software in QMS), 7.3 (design and development), 7.4 (purchasing) as applicable.
• IEC 62304:2006+A1:2015 — software lifecycle (often implemented under design controls).

Changelog

• 1.0.0 (2026-03-20): Initial skill covering 820.30, DHF, verification vs validation, ISO 13485 slice.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: AminAlam
• Source: AminAlam/meddev-agent-skills
• License: MIT

Install and usage instructions live in the source repository linked above.