five-whys

Installation
SKILL.md

Five Whys - Root Cause Analysis

Systematic guide to uncovering root causes through iterative questioning, originally developed by Sakichi Toyoda for Toyota Motor Corporation.

When to Use This Skill

  • Investigating recurring problems
  • Debugging system failures
  • Understanding customer churn
  • Analyzing project delays or budget overruns
  • Post-mortem analysis
  • Process improvement initiatives

Core Concepts

The Method

Related skills
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First Seen
Jan 30, 2026