Lean Six Sigma Yellow Belt The Analyze Phase 1 Flashcards
6 cards from real Lean Six Sigma Yellow 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 Yellow Belt The Analyze Phase 1 flashcards as text
What is the primary purpose of a Pareto chart during the Analyze phase of a Lean Six Sigma project?
Answer: To identify the 'vital few' causes that account for the majority of the problem
A Pareto chart applies the 80/20 rule, visually ranking causes by frequency or impact so the team can focus improvement efforts on the 'vital few' factors responsible for most of the defects or waste.
When applying the '5 Whys' technique in the Analyze phase, what is the team ultimately trying to uncover?
Answer: The root cause of a problem by repeatedly questioning each previous answer
The 5 Whys is a root-cause analysis technique where each answer is challenged with another 'why,' drilling past symptoms to reveal the underlying cause that, if addressed, eliminates the problem.
A correlation coefficient (r) of –0.92 between two variables in the Analyze phase most likely indicates:
Answer: A strong negative linear relationship between the two variables
A correlation coefficient close to –1 signals a strong negative (inverse) linear relationship: as one variable increases, the other decreases in a consistent, predictable pattern.
In the Analyze phase, which type of process variation is caused by factors that are always present and built into the system itself?
Answer: Common-cause variation
Common-cause variation is the natural, inherent variability of a stable process resulting from many small, random factors. Reducing it typically requires systemic process redesign, not just fixing isolated incidents.
During the Analyze phase, an R-squared (R²) value of 0.85 in a regression model tells the team:
Answer: 85% of the variation in the output variable is explained by the input variable(s) in the model
R-squared is the coefficient of determination; it measures how much of the variability in the output (Y) is accounted for by the input(s) (X) in the regression model. An R² of 0.85 means the model explains 85% of the output's variation.
A Lean Six Sigma team in the Analyze phase discovers that a step adds cost and time but does not change the product's form, fit, or function in any way the customer values. This step is classified as:
Answer: Non-value-added (waste) activity
An activity is non-value-added (waste) if it consumes resources but does not transform the product in a way the customer recognizes or is willing to pay for. Eliminating such steps is a core Lean objective.