dmaic

dmaic is a skill for Claude Code, Codex from RBraga01/Quality-Engineering-Skills. It costs 101 tokens per session (2,703 once invoked), scanned A, original, MIT.

A guide to DMAIC, a five-stage Six Sigma method for improving recurring problems with measurement and analysis: Define, Measure, Analyze, Improve, and Control. Six Sigma is a process-improvement approach that uses data to reduce defects and variation.

In plain words
What is it for?
Use it for recurring defects, waste, scrap, test failures, or process-capability improvements when data is available. It also helps prepare a DMAIC report when a customer specifically requests a Six Sigma approach.
Why use it?
It provides a structured way to investigate chronic problems that have continued despite earlier corrective actions. It helps teams set measurable goals and verify lasting process improvement.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it for recurring defects, waste, scrap, test failures, or process-capability improvements when data is available. It also helps prepare a DMAIC report when a customer specifically requests a Six Sigma approach.

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Install with agentmods
npx agentmods add skills/rbraga01/quality-engineering-skills/dmaic
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add RBraga01/Quality-Engineering-Skills --skill dmaic
Clone the repo
git clone --depth 1 https://github.com/RBraga01/Quality-Engineering-Skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for dmaic

README.md
[![agentmods](https://agentmods.dev/badge/skills/rbraga01/quality-engineering-skills/dmaic/github.svg)](https://agentmods.dev/skills/rbraga01/quality-engineering-skills/dmaic)
Your own site
<a href="https://agentmods.dev/skills/rbraga01/quality-engineering-skills/dmaic"><img src="https://agentmods.dev/badge/skills/rbraga01/quality-engineering-skills/dmaic/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for dmaic

Your own site · 80×15
<a href="https://agentmods.dev/skills/rbraga01/quality-engineering-skills/dmaic"><img src="https://agentmods.dev/badge/skills/rbraga01/quality-engineering-skills/dmaic.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 101 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,703 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00101 $0.02703
Opus 5 $0.00051 $0.01352
Sonnet 5 $0.00020 $0.00541
Haiku 4.5 $0.00010 $0.00270

Measured 10d ago against content hash f6425c4f7108, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

dmaic scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/problem-solving/dmaic/SKILL.md · 282 lines

How it starts

The opening of the file, as written. The whole thing — 282 lines — stays where its author put it; the contents beside it link to each section on GitHub.

DMAIC (Six Sigma Problem Solving)

When to use

Use DMAIC when:

  • A problem has recurred multiple times despite previous corrective actions
  • The process needs measurable, data-driven capability improvement (Cpk improvement target)
  • The root cause is unknown and requires statistical analysis to identify
  • A customer requires a Six Sigma approach or asks for a DMAIC report
  • The improvement opportunity involves eliminating chronic waste (rework, scrap, test failures)

Use 8D instead when: The problem is a single customer complaint, an escape to the field, or requires immediate containment. 8D is reactive and fast. DMAIC is proactive and thorough — it takes weeks to months.

Use PDCA instead when: The improvement is incremental and the root cause is already known or assumed.

Prerequisites

  • A defined problem with measurable impact (reject rate, Cpk, scrap cost, defect count)
  • Baseline data available or collectable
  • Process owner and cross-functional team assigned
  • Management support and a time budget (minimum 4–12 weeks depending on project scope)

Workflow

Phase 1 — DEFINE

Objective: Define the problem, the scope, the team, and the goal in measurable terms.

Key tools and deliverables:

Project Charter — The DMAIC starts and ends here. Contains:

  • Problem statement: what is happening, where, since when, how much (measured impact)
  • Goal statement: specific, measurable target (e.g., "Reduce connector reject rate from 3.2% to 0.5% by Q3")
  • Scope: what is IN and OUT of scope (use Is/Is-Not to define boundaries)
  • Business case: financial or customer impact ($, PPM, warranty cost)
  • Team: Champion, Black Belt/Green Belt, process owner, operators, engineering

SIPOC diagram:

  • Suppliers → Inputs → Process → Outputs → Customers
  • Defines the process at a high level before diving into detail
  • Identifies all inputs that could affect the output (Y)

Voice of the Customer (VOC) → CTQ:

  • What does the customer care about? (VOC)
  • Translate to a measurable Critical to Quality (CTQ) characteristic
  • The CTQ becomes the Y (output) the project will improve

Read the full file on GitHub · 282 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago First seen · 282 lines · 101 tokens per session scan A f6425c4f7108

Subscribe to this mod's changes

dmaic is a skill published in the GitHub repository RBraga01/Quality-Engineering-Skills (28 stars, last pushed today), licensed MIT. It adds 101 tokens to every session and 2,703 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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