# Mece Analysis

> Structure thinking using Mutually Exclusive, Collectively Exhaustive categories. Use when breaking down problems or ensuring complete coverage.

- Skill: `itseffi/mece-analysis` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add itseffi/mece-analysis`
- Raw SKILL.md: https://api.skillmd.com/api/skills/itseffi/mece-analysis/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: itseffi (https://skillmd.com/u/itseffi)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/itseffi/mece-analysis

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# MECE Analysis

Structure thinking using Mutually Exclusive, Collectively Exhaustive categories.

## When to Use

When you need to break down a problem, categorize options, or ensure complete coverage.

## The Principle

**MECE = Mutually Exclusive, Collectively Exhaustive**

- **Mutually Exclusive:** No overlap between categories
- **Collectively Exhaustive:** All possibilities covered

## The Process

### 1. Analyze Mutual Exclusivity

For each pair of items:
- Is there any overlap?
- Could something belong to both?
- If overlap exists, redefine boundaries

### 2. Analyze Collective Exhaustiveness

For the whole set:
- Are there gaps?
- What scenarios aren't covered?
- What's missing?

### 3. Create Logical Tree

Structure as hierarchy:
- Top level: Broadest categories
- Sub-levels: More specific breakdowns
- Each level should be MECE

## Example

**Bad (not MECE):**
- Marketing channels: Social, Digital, Facebook, Email
- (Facebook overlaps with Social and Digital)

**Good (MECE):**
- Marketing channels: Paid, Owned, Earned
  - Paid: Social ads, Search ads, Display
  - Owned: Email, Website, App
  - Earned: PR, Reviews, Word of mouth

## Output

- MECE categories with clear boundaries
- Logical tree showing hierarchy
- Notes on any gaps or overlaps found

## When Not to Use

Do not use this skill when the request is unrelated, low-stakes, or better handled by a simpler direct response.