Lean Six Sigma Green Belt Certification FREE Lean Six Sigma Green Belt DMAIC: Improve and Control Questions and Answers 2

Question 1

Which tool is most commonly used in the Improve phase to identify the optimal settings for key process variables?

Accepted Answer

Design of Experiments (DOE)

Answer

Design of Experiments systematically varies input factors to determine their effect on outputs and identify optimal process settings.

Question 2

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

Accepted Answer

To document the system for monitoring and controlling key process variables

Answer

A control plan documents the methods and responsibilities for monitoring key inputs and outputs to sustain improvements.

Question 3

In the Improve phase, what does a pilot test help the team accomplish before full-scale implementation?

Accepted Answer

Validate the proposed solution on a small scale to identify risks

Answer

A pilot test validates solutions in a controlled, small-scale environment to reduce risk before broader rollout.

Question 4

Which type of control chart would be most appropriate for monitoring the number of defects per unit after implementing improvements?

Accepted Answer

U-chart

Answer

A U-chart tracks the number of defects per unit when sample sizes may vary, making it ideal for monitoring defect rates.

Question 5

What is the purpose of conducting a Failure Modes and Effects Analysis (FMEA) during the Improve phase?

Accepted Answer

To prioritize potential failures by severity, occurrence, and detection before implementing solutions

Answer

FMEA evaluates potential failure modes and ranks them by Risk Priority Number to prioritize preventive actions before implementation.

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