Which tool is used to drill down into the root cause by repeatedly asking 'why'?

Which tool is used to drill down into the root cause by repeatedly asking 'why'?

• A. 5 Whys
• B. Fishbone Diagram
• C. Pareto Analysis
• D. Root Cause Analysis

Answer: (A)

The idea being tested is using iterative questioning to reach the root cause. This approach, known as the 5 Whys, starts with the problem and asks why it happened; the answer becomes the basis for the next why, and repeating this process typically reveals underlying issues rather than just the surface symptoms. It’s a simple, targeted way to trace cause and effect and to surface a clear corrective action that addresses the real problem. Other tools have different strengths: a Fishbone Diagram helps brainstorm and organize a wide range of potential causes into categories, a Pareto Analysis helps prioritize issues by impact or frequency, and Root Cause Analysis is the broader process that may employ multiple techniques (including 5 Whys) to determine underlying causes. For example, if a machine stops, you’d ask why it stopped, why the breaker tripped, why the motor overheated, and so on, until you identify a root cause such as inadequate maintenance scheduling, then implement a fix to address that underlying issue.

The idea being tested is using iterative questioning to reach the root cause. This approach, known as the 5 Whys, starts with the problem and asks why it happened; the answer becomes the basis for the next why, and repeating this process typically reveals underlying issues rather than just the surface symptoms. It’s a simple, targeted way to trace cause and effect and to surface a clear corrective action that addresses the real problem.

Other tools have different strengths: a Fishbone Diagram helps brainstorm and organize a wide range of potential causes into categories, a Pareto Analysis helps prioritize issues by impact or frequency, and Root Cause Analysis is the broader process that may employ multiple techniques (including 5 Whys) to determine underlying causes. For example, if a machine stops, you’d ask why it stopped, why the breaker tripped, why the motor overheated, and so on, until you identify a root cause such as inadequate maintenance scheduling, then implement a fix to address that underlying issue.