FREE Lean Six Sigma Green Belt DMAIC: Improve and Control Questions and Answers Flashcards
6 cards from real Lean Six Sigma Green Belt Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 FREE Lean Six Sigma Green Belt DMAIC: Improve and Control Questions and Answers flashcards as text
Which tool is most commonly used in the Improve phase to identify the optimal settings for key process variables?
Answer: Design of Experiments (DOE)
Design of Experiments systematically varies input factors to determine their effect on outputs and identify optimal process settings.
What is the primary purpose of a control plan in the Control phase of DMAIC?
Answer: To document the system for monitoring and controlling key process variables
A control plan documents the methods and responsibilities for monitoring key inputs and outputs to sustain improvements.
In the Improve phase, what does a pilot test help the team accomplish before full-scale implementation?
Answer: Validate the proposed solution on a small scale to identify risks
A pilot test validates solutions in a controlled, small-scale environment to reduce risk before broader rollout.
Which type of control chart would be most appropriate for monitoring the number of defects per unit after implementing improvements?
Answer: U-chart
A U-chart tracks the number of defects per unit when sample sizes may vary, making it ideal for monitoring defect rates.
What is the purpose of conducting a Failure Modes and Effects Analysis (FMEA) during the Improve phase?
Answer: To prioritize potential failures by severity, occurrence, and detection before implementing solutions
FMEA evaluates potential failure modes and ranks them by Risk Priority Number to prioritize preventive actions before implementation.
What does Statistical Process Control (SPC) primarily help a team detect during the Control phase?
Answer: Special cause variation indicating the process has shifted out of control
SPC uses control charts to detect special cause variation, signaling that the process has deviated from its stable, improved state.