Basic Flashcards
7 cards from real Lean Six Sigma Black 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 Basic flashcards as text
Which analysis technique identifies the vital few causes responsible for the majority of defects, based on the 80/20 rule?
Answer: Pareto analysis
Pareto analysis applies the 80/20 principle to prioritize the vital few causes (roughly 20%) that account for the majority (roughly 80%) of defects or problems.
In a full factorial DOE with 3 factors each at 2 levels, how many experimental runs are required (without replication)?
Answer: 8
A 2³ full factorial design requires 2³ = 8 experimental runs to test all combinations of 3 factors at 2 levels each.
Which Lean concept refers to the rate at which a system must produce to meet customer demand?
Answer: Takt time
Takt time = Available production time ÷ Customer demand rate, and it sets the production rhythm needed to satisfy customer demand without over- or under-producing.
A Black Belt wants to test if the variance of two independent processes is statistically different. Which test should be used?
Answer: F-test (Levene's or Bartlett's test)
The F-test, Levene's test, or Bartlett's test compares the variances of two or more groups to determine if they are statistically different.
Which Six Sigma role is typically responsible for removing organizational roadblocks and ensuring resource availability for Black Belt projects?
Answer: Champion/Sponsor
Champions or Sponsors are senior leaders who own the business results of Six Sigma projects, remove obstacles, secure resources, and align projects with strategic goals.
Process capability index Cpk differs from Cp in that Cpk:
Answer: Accounts for process centering relative to specification limits
Cpk accounts for both spread and centering by using the minimum of (USL−mean)/3σ and (mean−LSL)/3σ, so a shifted process will have a lower Cpk than Cp.
Which of the following best describes a 'mistake-proofing' (poka-yoke) device?
Answer: A physical or electronic mechanism that prevents errors or makes them immediately obvious
Poka-yoke devices are physical or electronic mechanisms designed to prevent defects from occurring or to detect them immediately when they do, making errors impossible or obvious.