Assessment Flashcards
7 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 7 Assessment flashcards as text
A Green Belt assesses a supplier's delivery performance using a p-chart. The chart shows the process is in control with an average defective rate of 4%. This means:
Answer: The process is stable and predictable at the current 4% defective rate
An in-control process on a p-chart is stable and predictable; while the 4% rate may not be acceptable, it is consistent — improvement requires a fundamental process change, not firefighting.
When assessing the potential impact of process inputs, a Green Belt uses FMEA. The Risk Priority Number (RPN) is calculated as:
Answer: Severity × Occurrence × Detection
RPN = Severity × Occurrence × Detection, where each factor is rated 1-10, giving a maximum RPN of 1,000 to prioritize corrective actions.
A Green Belt is assessing whether two process improvement ideas produce statistically different results. Which statistical test is most appropriate when comparing the means of two independent groups with continuous data?
Answer: Two-sample t-test
A two-sample t-test compares the means of two independent groups with continuous data to determine if the difference is statistically significant.
During a process assessment, the team discovers that 80% of defects come from 20% of the causes. Which tool visually demonstrates this relationship?
Answer: Pareto chart
A Pareto chart displays defects or causes in descending order with a cumulative percentage line, visually illustrating the 80/20 principle for prioritization.
A Green Belt performs a linear regression as part of process assessment. The R² value is 0.92. What does this indicate?
Answer: 92% of the variation in Y is explained by the regression model
R² (coefficient of determination) represents the proportion of variance in the dependent variable (Y) that is explained by the independent variable(s) in the regression model.
A team assessing a transactional process uses process cycle efficiency (PCE). A PCE of 15% means:
Answer: Only 15% of total lead time is value-added time
PCE = Value-Added Time / Total Lead Time × 100; a PCE of 15% means only 15% of the total elapsed time actually adds value for the customer.
When assessing measurement system bias, a Green Belt compares instrument readings to a known reference value. This assessment is called:
Answer: Accuracy/bias study
A bias (accuracy) study determines the difference between the average measurement from a gauge and the true (reference) value of the measured characteristic.