Lean Six Sigma Green Belt Certification Control Phase and Sustainment 3

Question 1

After project closure, responsibility for sustaining process improvements typically transfers to:

Accepted Answer

The process owner or operations manager

Answer

The process owner or operations manager assumes accountability for sustaining improvements after the project team disbands, ensuring long-term ownership.

Question 2

Which tool BEST helps identify which process inputs require monitoring in the Control phase?

Accepted Answer

FMEA with Risk Priority Numbers

Answer

The FMEA with Risk Priority Numbers (RPNs) prioritizes which failure modes and inputs pose the highest risk, directing control plan monitoring efforts to the most critical variables.

Question 3

What is the difference between common cause variation and special cause variation?

Accepted Answer

Common cause is inherent to the system; special cause comes from assignable external factors

Answer

Common cause variation is the natural, inherent variation within a stable system, while special cause variation results from identifiable, assignable factors outside the system.

Question 4

A Green Belt wants to verify the measurement system is still adequate before finalizing the control plan. Which study should be conducted?

Accepted Answer

Gage R&R study

Answer

A Gage R&R (Repeatability and Reproducibility) study evaluates whether the measurement system has acceptable precision relative to process variation and tolerances.

Question 5

In a control plan, 'frequency' refers to:

Accepted Answer

How often a measurement is taken for a given CTQ or control variable

Answer

Frequency in a control plan specifies how often each characteristic must be measured (e.g., every hour, every 50 units) to detect shifts in the process in a timely manner.

Lean Six Sigma Green Belt Certification Practice Test

Lean Six Sigma Green Belt Certification Practice Test

Lean Six Sigma Green Belt Certification Control Phase and Sustainment 3