Lean Six Sigma Yellow Belt Certification The Analyze Phase 3

Question 1

What is the primary purpose of a Fishbone (Ishikawa) diagram in the Analyze phase?

Accepted Answer

To organize and display potential causes of a problem

Answer

A Fishbone diagram visually organizes potential causes of a problem into categories (e.g., Man, Machine, Method, Material) to facilitate root cause analysis.

Question 2

During root cause analysis, a team repeatedly asks 'why' after each answer. After five iterations they identify an equipment calibration issue. What technique did they use?

Accepted Answer

5 Whys

Answer

The 5 Whys technique iteratively asks 'why' to drill past symptoms and surface the true root cause of a problem.

Question 3

Which statement about correlation and causation is correct in Lean Six Sigma analysis?

Accepted Answer

Correlation indicates a relationship but does not prove causation

Answer

Correlation shows that two variables move together, but additional analysis (such as DOE or subject matter expertise) is required to establish a causal relationship.

Question 4

A Yellow Belt team is analyzing cycle time data and finds a data point far outside the typical range. What is this called?

Accepted Answer

An outlier

Answer

An outlier is a data point that falls significantly outside the expected range and can distort analysis if not investigated and addressed appropriately.

Question 5

In a Lean Six Sigma Analyze phase, what does 'value-added' activity mean?

Accepted Answer

An activity the customer is willing to pay for that transforms the product

Answer

A value-added activity must meet three criteria: the customer is willing to pay for it, it transforms the product or service, and it is done correctly the first time.

Lean Six Sigma Yellow Belt Certification Practice Test

Lean Six Sigma Yellow Belt Certification Practice Test

Lean Six Sigma Yellow Belt Certification The Analyze Phase 3