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 statistical tool is most appropriate for determining whether a statistically significant difference exists between the means of three or more independent groups?
Answer: One-way ANOVA
One-way ANOVA (Analysis of Variance) tests whether the means of three or more independent groups differ significantly by comparing within-group and between-group variance.
In a control chart, what does a 'run of 8 consecutive points on one side of the center line' indicate?
Answer: A special cause that should be investigated
According to Western Electric rules, 8 or more consecutive points on the same side of the center line is a non-random pattern indicating a special cause of variation.
Which document formally authorizes a Six Sigma project and assigns the Black Belt?
Answer: Project charter
The project charter defines the project scope, goals, timeline, team roles, and business case, and it serves as the official authorization to proceed.
The 7 wastes of Lean are represented by the acronym TIMWOOD. What does the 'M' stand for?
Answer: Motion
In TIMWOOD (Transportation, Inventory, Motion, Waiting, Over-processing, Overproduction, Defects), 'M' stands for Motion — unnecessary movement of people.
A Gauge R&R study reveals that %GRR is 28%. How should this measurement system be classified?
Answer: Marginal — may be acceptable depending on context
A %GRR between 10% and 30% is considered marginal; acceptability depends on the application's importance and cost of measurement improvement.
Which hypothesis is tested against the alternative hypothesis in inferential statistics?
Answer: Null hypothesis
The null hypothesis (H₀) is the default assumption of no effect or no difference, which is tested and either rejected or failed to be rejected based on sample data.
In a value stream map, which symbol typically represents a push arrow indicating inventory being pushed to the next step?
Answer: A straight push arrow
A straight push arrow in VSM indicates that material is pushed downstream regardless of actual need, as opposed to pull systems triggered by customer demand.