# Dfmea Design

> >-

- **Type:** Skill
- **Install:** `agentstack add skill-rbraga01-quality-engineering-skills-dfmea-design`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [RBraga01](https://agentstack.voostack.com/s/rbraga01)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [RBraga01](https://github.com/RBraga01)
- **Source:** https://github.com/RBraga01/Quality-Engineering-Skills/tree/master/skills/risk-analysis/dfmea-design
- **Website:** https://rbraga01.github.io/Quality-Engineering-Skills

## Install

```sh
agentstack add skill-rbraga01-quality-engineering-skills-dfmea-design
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Design FMEA (DFMEA) — AIAG-VDA 2019

## Goal

Identify and mitigate design risks by analysing functions, interfaces, and failure modes — so that design weaknesses are resolved before release to manufacturing, and the results feed directly into the DVP, PFMEA, and Control Plan.

## Required Execution Checklist

- [ ] DFMEA scope defined: boundary diagram complete, inside/outside boundary identified
- [ ] Product hierarchy mapped: system → subsystem → component → interface (Step 2)
- [ ] All interfaces identified — internal (component-to-component), external (environment), and user/assembly
- [ ] All functions defined with Verb + Noun + Measurable Standard (Step 3)
- [ ] Each function has a measurable verification method confirmed in the DVP
- [ ] Failure chain complete: Effect → Mode → Cause for each function (Step 4)
- [ ] All Failure Causes validated using engineering analysis (FEA, calculation) or test evidence — not assumptions
- [ ] S/O/D ratings justified using analysis, test data, or design history
- [ ] All H-AP items have a defined action, named owner, and target date
- [ ] DFMEA → DVP, PFMEA, and drawing linkage verified before release to manufacturing

---

## When to use

- New product development (integrate into APQP Phase 2 — Product Design and Development)
- Design change or engineering change request (ECR)
- Field failure investigation revealing a design root cause
- Periodic design review
- Before handoff to manufacturing (DFMEA drives the PFMEA)

**Key difference from PFMEA:** DFMEA analyses the design intent and design robustness. PFMEA analyses the manufacturing process. DFMEA comes first — its failure effects and severity ratings inform the PFMEA.

## Prerequisites

- Product requirements / specification (engineering drawing, customer spec)
- System block diagram or product breakdown structure
- Interface matrix (if system-level analysis)
- Team: design engineer, systems engineer, quality engineer, reliability (if available)

## The 7-Step AIAG-VDA 2019 Approach for DFMEA

---

### Step 1 — Planning and Preparation

Define scope:
- **Analysis object:** component, subsystem, or system
- **Customer:** who is the next-level assembly? Who is the end user?
- **Boundary diagram:** what is inside and outside the DFMEA scope
- **Interface matrix:** what interacts with this component (mechanical, electrical, thermal, chemical)?

---

### Step 2 — Structure Analysis (Design Hierarchy)

Map the product hierarchy:

```
System (e.g., Steering Column)
└── Subsystem (e.g., Tilt Mechanism)
    └── Component (e.g., Pivot Pin)
        └── Interface (e.g., Pin-to-Bracket contact)
```

**Interface matrix:**
For each component, identify:
- Interfaces to other components (internal)
- Interfaces to the environment (external): heat, vibration, corrosion, electromagnetic
- Interfaces to the user or assembly process

Interfaces are where most design failures occur. Each interface must be analysed as a potential failure location in its own right — not just the components that share it. In practice, at least 50% of DFMEA effort should focus on interfaces and interactions; component-only analysis misses the most common field failure modes.

---

### Step 3 — Function Analysis

For each element in the structure, define its design function:

**Format:** Verb + Noun + Measurable Standard

Examples:
- Component function: "Transmit torque of 50 Nm ± 5 Nm without permanent deformation"
- Interface function: "Maintain sealing at pressure 2.5 bar across -40°C to +120°C"
- System function: "Provide steering angle feedback with latency  "How would you like to receive the output?
> **A** — Structured Markdown (formatted tables and sections, ready to copy)
> **B** — Plain tables (simplified structure for Excel or Word)
> **C** — Narrative report (flowing text for a formal document or email)
>
> Default: A."

Adapt all output sections to the chosen format. If the platform or session context already defines a format preference, skip this question.

## Reference files

- [Interface matrix construction guide](references/interface-matrix.md)

## Changelog

| Version | Date | Author | Change |
|---------|------|--------|--------|
| 1.0 | 2026-06-01 | @RBraga01 | Initial release |
| 1.1 | 2026-06-03 | @RBraga01 | Added interface matrix integration and DFMEA-to-PFMEA handoff workflow |

## Source & license

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

- **Author:** [RBraga01](https://github.com/RBraga01)
- **Source:** [RBraga01/Quality-Engineering-Skills](https://github.com/RBraga01/Quality-Engineering-Skills)
- **License:** MIT
- **Homepage:** https://rbraga01.github.io/Quality-Engineering-Skills

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

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-rbraga01-quality-engineering-skills-dfmea-design
- Seller: https://agentstack.voostack.com/s/rbraga01
- Browse the marketplace: https://agentstack.voostack.com/browse

---
Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.