Lean Six Sigma Green Belt Certification Knowledge 5

Question 1

Which control chart is most appropriate for monitoring individual measurements when subgroup sizes equal 1?

Accepted Answer

Individuals and Moving Range (I-MR) chart

Answer

The I-MR chart monitors individual data points and uses moving ranges between consecutive points to estimate process variation when only one measurement is taken at a time.

Question 2

A project charter defines the problem statement, scope, goals, and team. Which element is most critical to include to ensure project boundaries are respected?

Accepted Answer

Scope statement

Answer

The scope statement explicitly defines what is included and excluded from the project, preventing scope creep and keeping the team focused on the right problem.

Question 3

In a cause-and-effect (fishbone) diagram, the 'bones' typically represent which categories?

Accepted Answer

Man, Machine, Method, Material, Measurement, Environment

Answer

The 6M categories (Man, Machine, Method, Material, Measurement, Environment) form the main branches of a fishbone diagram to systematically explore root causes.

Question 4

What is the primary goal of a control plan in the Control phase of DMAIC?

Accepted Answer

To provide a roadmap for sustaining process improvements after the project closes

Answer

A control plan specifies the monitoring methods, response plans, and responsibilities needed to sustain improvements and prevent reversion to old process behavior.

Question 5

When conducting a multi-vari study, the Green Belt is looking to understand:

Accepted Answer

The sources and patterns of variation (positional, cyclical, temporal)

Answer

Multi-vari charts graphically display three families of variation — positional, cyclical, and temporal — to narrow down which family contributes most to the observed variation.

Lean Six Sigma Green Belt Certification Practice Test

Lean Six Sigma Green Belt Certification Practice Test

Lean Six Sigma Green Belt Certification Knowledge 5