YYAN

The Why-Why analysis method is a root cause analysis tool used to delve deeply into the origin of a problem by repeatedly asking “Why?”—typically five times, though the number can vary based on the complexity of the issue. This method promotes thorough problem-solving by identifying underlying causes rather than just treating symptoms, allowing teams to address fundamental issues and implement sustainable solutions. It is commonly applied in quality control, process improvement, and troubleshooting to help prevent problem recurrence.