Which method helps identify the true root cause by repeatedly asking 'Why?'

• A. 4Ss
• B. The Five-Why Method
• C. Fish Bone Diagram
• D. 3Ms and a P

Answer: (B)

Repeatedly asking why is a direct approach to uncover the root cause. The Five-Why Method starts with the problem and asks why it happened, then asks why again for each answer, continuing until you reach a cause that can’t be explained further. This drill-down process moves from surface symptoms to the underlying issue and helps you address the real driver behind the problem. It’s simple, team-based, and especially effective when causes unfold in a causal chain. Other tools like a Fishbone Diagram help map possible causes but don’t automatically apply an iterative why sequence; 4S and 3Ms and a P offer broader organizational frameworks rather than the specific technique of drilling down by asking why.