Lean Six Sigma Yellow Belt Certification FREE Lean Six Sigma Yellow Belt Control and Sustainment Methods Questions and Answers 2 — Questions and Answers
Question 1: Which document is primarily used to hand off a process improvement to the process owner during the Control phase?
- Control Plan (Correct answer)
- Project Charter
- SIPOC Diagram
- Value Stream Map
Correct answer: Control Plan
A Control Plan documents the methods and responsibilities needed to sustain improvements after the project team disbands.
Question 2: What is the purpose of a Standard Operating Procedure (SOP) in the Sustainment phase?
- To document the new process steps so all operators perform consistently (Correct answer)
- To identify root causes of defects
- To measure baseline process capability
- To prioritize improvement projects
Correct answer: To document the new process steps so all operators perform consistently
SOPs ensure every operator follows the same improved process steps, reducing variation and sustaining gains.
Question 3: In a control chart, what does a point falling outside the Upper Control Limit (UCL) indicate?
- Special cause variation is present (Correct answer)
- The process is in statistical control
- Common cause variation has decreased
- The specification limits need adjustment
Correct answer: Special cause variation is present
A point beyond the UCL signals special cause variation, meaning an assignable factor is affecting the process.
Question 4: Which sustainment technique involves scheduled reviews at 30, 60, and 90 days after implementation?
- Post-implementation audit (Correct answer)
- Gemba walk
- Kaizen event
- Tollgate review
Correct answer: Post-implementation audit
Post-implementation audits at set intervals verify that improvements remain effective and identify any performance drift.
Question 5: What is the primary risk if a Visual Management system is NOT implemented during the Control phase?
- Deviations from the improved process go unnoticed (Correct answer)
- The project charter becomes obsolete
- Fishbone diagrams lose accuracy
- DMAIC reverts to DMADV
Correct answer: Deviations from the improved process go unnoticed
Without Visual Management, operators and supervisors cannot quickly detect when the process drifts from its improved state.
Question 6: Which metric is most appropriate for monitoring whether a sustained process continues to meet customer requirements?
- Process Capability Index (Cpk) (Correct answer)
- Return on Investment (ROI)
- Net Promoter Score (NPS)
- Earned Value (EV)
Correct answer: Process Capability Index (Cpk)
Cpk measures how well a process output stays within customer specification limits, making it ideal for ongoing control monitoring.
Lean Six Sigma Yellow Belt Certification FREE Lean Six Sigma Yellow Belt Control and Sustainment Methods Questions and Answers 2
Which document is primarily used to hand off a process improvement to the process owner during the Control phase?