Lean Six Sigma Green Belt Analyze Phase Tools 1 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 Lean Six Sigma Green Belt Analyze Phase Tools 1 flashcards as text
What is the primary purpose of a fishbone (Ishikawa) diagram in the Analyze phase?
Answer: To identify and organize potential root causes of a defect or problem
The fishbone diagram structures potential causes into categories (such as Man, Machine, Method, Material, Measurement, and Environment) so teams can systematically brainstorm and organize root causes rather than treating them as an unstructured list.
In a one-way ANOVA, which statistical measure is being compared across the groups?
Answer: The means of each group
ANOVA (Analysis of Variance) tests whether the means of three or more groups are statistically equal by partitioning total variation into within-group and between-group components and comparing them via an F-ratio.
What does the R-squared (R²) value indicate in a simple linear regression output?
Answer: The proportion of total variation in Y that is explained by X
R-squared, or the coefficient of determination, quantifies how much of the variability in the response variable (Y) is accounted for by the predictor variable (X) in the regression model. A value of 1.0 means the model explains all variation.
A multi-vari chart is primarily used in the Analyze phase to:
Answer: Identify and compare multiple families of variation (within-unit, unit-to-unit, time-to-time)
Multi-vari charts graphically reveal the dominant source of variation by displaying within-piece, piece-to-piece, and time-to-time variation simultaneously, allowing the team to focus detailed statistical analysis on the right family of variation.
A process has a Cpk of 0.85. What does this indicate?
Answer: The process is not capable of consistently producing output within specification limits
A Cpk below 1.00 means the process is not capable — it will produce defects outside specification limits. A Cpk of at least 1.33 is typically required to demonstrate adequate short-term capability, and 1.67 or higher for critical characteristics.
In the Analyze phase, a Pareto chart supports the team's work primarily by:
Answer: Prioritizing the vital few defect categories that account for the majority of problems
Based on the Pareto (80/20) principle, a Pareto chart ranks defect types or failure causes by frequency or cost, helping the team focus improvement resources on the small number of categories responsible for most of the harm rather than spreading effort uniformly.