Root cause analysis with 5 Whys methodology. Triggers: root cause, 5 Whys, なぜなぜ分析, 根本原因, 原因分析, symptom fix, 対症療法.
Scanned 2/10/2026
Install to Claude Code
npx -y skills add majiayu000/claude-skill-registry --skill analyzing-root-causes --agent claude-codeInstalls into .claude/skills of the current project.
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---
name: analyzing-root-causes
description: >
Root cause analysis with 5 Whys methodology.
Triggers: root cause, 5 Whys, なぜなぜ分析, 根本原因, 原因分析, symptom fix, 対症療法.
allowed-tools: [Read, Grep, Glob, Task]
context: fork
user-invocable: false
---
# 根本原因分析 - 5 Whys
## 症状 vs 根本原因
| タイプ | 例 | 結果 |
| ------------ | ----------------------------- | -------------- |
| 症状修正 | DOM待ちのためにsetTimeout追加 | 後で壊れる |
| 根本原因修正 | React refを適切に使用 | 恒久的な解決 |
| 症状修正 | 二重送信防止フラグを追加 | 複雑性が増大 |
| 根本原因修正 | 送信中にボタンを無効化 | シンプルな修正 |
## 5 Whysプロセス
| Step | 質問 | 明らかになること |
| ---- | -------------------- | ------------------ |
| 1 | なぜ発生する? | 観察可能な事実 |
| 2 | なぜそれが起こる? | 実装詳細 |
| 3 | なぜそうなっている? | 設計決定 |
| 4 | なぜそれが存在する? | アーキテクチャ制約 |
| 5 | なぜそう設計された? | 根本原因 |
## 参考
| トピック | ファイル |
| -------- | -------------------------------- |
| 5 Whys | `references/five-whys.md` |
| パターン | `references/symptom-patterns.md` |
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