Lean Six Sigma Green Belt Practice Exam — All Questions
4 questions
In the Define phase, what is the primary purpose of a project charter?
- a.To calculate the process sigma level
- b.To formally authorize the project and align the team on problem, scope, goal, and business case✓
- c.To document the final control plan
- d.To perform hypothesis testing on the data
The charter is the foundational Define deliverable: it states the problem, scope, goal, business case, team, and timeline so the project is authorized and everyone shares the same objective. Sigma calculations, control plans, and hypothesis tests come in later DMAIC phases.
A SIPOC diagram is used to define which of the following?
- a.The statistical distribution of a critical output
- b.The financial return on the project
- c.The high-level process: Suppliers, Inputs, Process, Outputs, and Customers✓
- d.The root cause of every defect
SIPOC gives a high-level map of Suppliers, Inputs, Process, Outputs, and Customers to bound the process under study. It is a scoping tool, not a statistical, financial, or root-cause analysis tool.
"Critical to Quality" (CTQ) characteristics are best described as:
- a.Measurable product or process features that translate the customer's needs into requirements✓
- b.The team members assigned to the project
- c.The control limits on a process behavior chart
- d.Non-value-added steps in the value stream
CTQs convert the Voice of the Customer into specific, measurable requirements the process must meet. They are derived from customer needs, not from team rosters, control charts, or waste categories.
Which tool helps a Green Belt prioritize which projects or problems to work on by weighting customer requirements against options?
- a.Ishikawa (fishbone) diagram
- b.Control chart
- c.Histogram
- d.Pugh matrix or prioritization matrix✓
A prioritization or Pugh matrix scores options against weighted criteria to guide selection. Fishbone diagrams find causes, control charts monitor stability, and histograms show distribution shape.