メニュー
Categorize the factors of a problem so they don't overlap (Mutually Exclusive) and nothing is missed (Collectively Exhaustive). Outputs nested Markdown bullets. Use for problem structuring, "make sure I've thought of everything", or step 1 of a strategic analysis.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
Apply the 5 Whys technique to drill from a surface problem to a root cause. Outputs five sequentially numbered "Why?" lines with brief answers, ending in a root-cause statement. Use after an issue tree to drill the critical branch deeper, or any time the user wants to test whether the apparent cause is the actual cause.
Structure a recommendation top-down — Barbara Minto's Pyramid Principle. Outputs a single-sentence top-line answer, three to five supporting arguments, and one layer of evidence under each. Use to convert analysis into executive communication, or to structure a board-meeting talk track.
Tier-1 strategy-consultant analysis using seven frameworks in sequence — MECE, Issue Trees, 5 Whys, Hypothesis-Driven, Pareto, So What?, and Pyramid Principle. Use when the analysis needs both deeper root-cause drilling AND executive-ready communication structure. Heavier than the 5-framework master; reach for it on high-stakes work.
Tier-1 strategy-consultant analysis tailored for edtech / online-learning problems — activation, completion, learning outcomes, monetization. Same five frameworks with edtech-aware MECE defaults, vocabulary, and root-cause priors.
Tier-1 strategy-consultant analysis tailored for fintech / payments / lending / fraud problems — approval rates, fraud loss, delinquency, regulatory friction. Same five frameworks with fintech-aware MECE defaults, vocabulary, and root-cause priors.
Tier-1 strategy-consultant analysis tailored for public-sector / civic-ops problems — backlogs, processing cycle time, citizen satisfaction, procurement. Same five frameworks with government-aware MECE defaults, vocabulary, and root-cause priors.
SOC 職業分類に基づく
| name | mece-framework |
| description | Categorize the factors of a problem so they don't overlap (Mutually Exclusive) and nothing is missed (Collectively Exhaustive). Outputs nested Markdown bullets. Use for problem structuring, "make sure I've thought of everything", or step 1 of a strategic analysis. |
MECE — Mutually Exclusive, Collectively Exhaustive — is the foundation of structured problem solving:
Non-MECE breakdowns look rigorous but aren't — overlapping categories double-count, and missing categories blind you to root causes.
Nested Markdown bullets. Top-level bullets are categories in bold; nested bullets are the specific factors under each category.
- **Category 1**
- Sub-factor A
- Sub-factor B
- **Category 2**
- Sub-factor C
- Sub-factor D
| Default | When to flex |
|---|---|
| 3–6 top-level categories | If the problem has only 2 real categories, use 2 — don't pad. If it has 7, use 7. |
| 2–5 sub-factors per category | Use as many as the problem actually contains. |
| Categories specific to the problem | Generic "People/Process/Technology" buckets are a smell — only use them if they genuinely fit. |
Rule that doesn't flex: the categories must be MECE. Test each one — could a factor reasonably belong to two? Then merge or split. Could relevant factors not fit anywhere? Then add a category.
Problem: A regional courier company's on-time delivery rate fell from 94% to 81% in six months.
- **Network capacity**
- Vehicle fleet utilization (peak hour saturation)
- Driver headcount vs. demand
- Hub sortation throughput
- **Routing & dispatch**
- Algorithm changes after the Q2 system migration
- Address-data quality (geocoding errors)
- Manual route overrides by dispatchers
- **Demand pattern shift**
- New high-volume customer added in Q1
- Seasonal swing into peak retail months
- Same-day delivery share rising
- **Workforce**
- Driver turnover and onboarding ramp time
- Overtime caps from new labor agreement
- Sick days / absenteeism trend
- **External**
- Construction zones in two metro areas
- Two consecutive months of unusual weather
Notice: every category is specific to a courier business. No "People/Process/Technology." Every sub-factor is concrete enough to investigate.
strategy-consultant — MECE is step 1 of 5.Adapted from Analyst Academy on YouTube — 5 Consulting Frameworks to Solve Any Problem. MIT-licensed; see LICENSE.