Lean Six Sigma Green Belt 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 1 flashcards as text
What is the primary objective of the Analyze phase in DMAIC?
Answer: Identify and verify the root causes of the problem
The Analyze phase focuses on using data and analytical tools (such as fishbone diagrams, regression, and hypothesis testing) to identify and statistically verify the true root causes of the problem before moving to solutions.
Which process capability index accounts for BOTH process spread and process centering relative to specification limits?
Answer: Cpk
Cpk adjusts for how well the process mean is centered between the specification limits, making it a more complete measure than Cp, which only considers spread. A process can have a high Cp but a low Cpk if it is off-center.
In Lean methodology, which of the following best describes the waste of 'Overproduction'?
Answer: Producing more output than the customer currently needs
Overproduction—making more than is needed, sooner than needed—is considered the worst of the eight Lean wastes because it generates or hides most of the other wastes such as inventory, transportation, and defects.
A Fishbone (Ishikawa) diagram is primarily used to:
Answer: Organize and display potential root causes grouped by category
The Fishbone diagram structures brainstormed potential causes into categories (e.g., Man, Machine, Method, Material, Measurement, Environment), helping teams systematically explore why a problem exists without jumping to solutions.
In hypothesis testing, if the p-value is 0.03 and the significance level (α) is 0.05, the correct conclusion is:
Answer: Reject the null hypothesis; the result is statistically significant
When the p-value (0.03) is less than α (0.05), there is sufficient statistical evidence to reject the null hypothesis. This means the observed effect is unlikely due to random chance at the chosen confidence level.
What does the Risk Priority Number (RPN) in a Failure Mode and Effects Analysis (FMEA) represent?
Answer: The product of Severity, Occurrence, and Detection ratings
RPN = Severity × Occurrence × Detection. This composite score helps teams prioritize which failure modes need immediate corrective action, with higher RPNs indicating greater risk requiring attention first.