Lean Six Sigma Yellow Belt Certification FREE Lean Six Sigma Yellow Belt Root Cause Analysis Questions and Answers 2

Question 1

Which root cause analysis tool uses repeated questioning to drill down from a symptom to its underlying cause?

Accepted Answer

5 Whys

Answer

The 5 Whys technique involves asking 'why' repeatedly until the fundamental cause of a problem is identified.

Question 2

In a Cause-and-Effect diagram, what does the 'head' of the fish represent?

Accepted Answer

The effect or problem

Answer

The head of the fishbone diagram represents the problem or effect being analyzed, while the bones represent potential causes.

Question 3

What is a key limitation of the 5 Whys technique?

Accepted Answer

It can follow only one causal path at a time

Answer

The 5 Whys tends to follow a single chain of causation, potentially missing other contributing root causes.

Question 4

Which category is NOT one of the traditional 6Ms used in an Ishikawa diagram?

Accepted Answer

Money

Answer

The traditional 6Ms are Manpower, Machine, Material, Method, Measurement, and Mother Nature (Environment), not Money.

Question 5

What is the primary purpose of a fault tree analysis in root cause analysis?

Accepted Answer

To map logical relationships between failures and their causes

Answer

Fault tree analysis uses Boolean logic to map how combinations of lower-level failures can lead to a top-level undesired event.

Lean Six Sigma Yellow Belt Certification Practice Test