Practice Flashcards
7 cards from real Certified Six Sigma Black Belt Exam practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Practice flashcards as text
A process is in statistical control but producing 15% defects. The appropriate response is to:
Answer: Redesign or fundamentally change the process
A stable but incapable process requires systemic improvement—adjusting inputs or redesigning the process—not just monitoring.
Which tool maps the sequence of steps in a process and clearly shows both value-added and non-value-added activities?
Answer: Value stream map
Value stream mapping (VSM) documents material and information flow, identifying waste and non-value-added steps.
In a 2-level full factorial DOE, an interaction effect between factors A and B means:
Answer: The effect of A on Y depends on the level of B
An interaction means the combined effect of A and B on the response is not simply additive—the level of one factor changes the effect of the other.
A Black Belt calculates the p-value for a hypothesis test as 0.03 with α = 0.05. The correct conclusion is:
Answer: Reject H₀ because p < α
Since p-value (0.03) < α (0.05), there is sufficient evidence to reject the null hypothesis.
The primary purpose of a SIPOC diagram in the Define phase is to:
Answer: Provide a high-level view of the process scope and stakeholders
SIPOC maps Suppliers, Inputs, Process steps, Outputs, and Customers to define process boundaries at a macro level.
Takt time is calculated as:
Answer: Total production time divided by customer demand rate
Takt time = available production time ÷ customer demand, setting the production pace to match demand.
When a Black Belt applies the Box-Cox transformation to process data, the primary objective is to:
Answer: Transform non-normal data to approximate normality for parametric analysis
The Box-Cox transformation applies a power transformation to stabilize variance and normalize non-normal data.