Analyze Phase Tools 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 Analyze Phase Tools flashcards as text
A Green Belt performs a one-way ANOVA and obtains an F-statistic with p = 0.001. What is the correct interpretation?
Answer: At least one group mean is significantly different from the others
A significant ANOVA F-test indicates that at least one group mean differs, but does not specify which groups differ.
What does a 'spaghetti diagram' reveal in the Analyze phase?
Answer: The physical flow path of people, materials, or products through a workspace
A spaghetti diagram traces actual movement paths in a physical layout to identify inefficient travel, backtracking, and waste.
When using a cause-and-effect matrix, what are the rows and columns typically represent?
Answer: Rows = process inputs (Xs), Columns = key process outputs (Ys)
The C&E matrix rates each input (X) against each output (Y), helping prioritize which inputs most impact critical outputs.
A Lean Six Sigma team finds that 20% of the product types account for 78% of customer complaints. Which tool was used to identify this insight?
Answer: Pareto chart
A Pareto chart ranks categories by frequency or impact, making it easy to identify the 'vital few' causes following the 80/20 principle.
In a designed experiment, what is a 'confounded' effect?
Answer: Two or more effects that cannot be separately estimated because they are aliased
Confounding (aliasing) occurs when two effects are mathematically indistinguishable from each other in a fractional factorial design.
Which Analyze phase tool would a team use to determine whether process variation increased after a shift change by comparing the variance of two data sets?
Answer: Levene's test or F-test for equal variances
Levene's test or the F-test (variance ratio test) directly compares the variances of two groups to determine if they are statistically different.
A Green Belt uses a 'concentration diagram' during the Analyze phase. What information does this tool provide?
Answer: The physical location of defects on a unit or product map
A concentration diagram overlays defect locations on a drawing or image of the unit to reveal spatial patterns in where defects occur.