General 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 General flashcards as text
A Black Belt applies the 5 Whys technique during a problem-solving session. What is its primary limitation?
Answer: It relies on team knowledge and can lead to different root causes depending on participants
The 5 Whys is subjective and team-dependent, meaning different groups analyzing the same problem may arrive at different root causes.
In the context of Statistical Process Control, what does the Western Electric Rule 2 (also called the '2-of-3 rule') detect?
Answer: Two of three consecutive points beyond 2 sigma on the same side of the centerline
Western Electric Rule 2 flags a potential shift when 2 of 3 consecutive points fall beyond the 2-sigma warning limit on the same side of the center line.
Which of the following best describes the purpose of a SIPOC diagram in the Define phase?
Answer: To provide a high-level view of the process and identify key stakeholders and boundaries
A SIPOC diagram gives project teams a macro-level view of the process, capturing Suppliers, Inputs, Process steps, Outputs, and Customers to establish scope.
What does 'confounding' mean in the context of a fractional factorial experiment?
Answer: Two or more effects cannot be estimated independently because they are aliased with each other
Confounding (aliasing) occurs when the design cannot distinguish between two effects because they are mathematically identical in the chosen fraction of the experiment.
A Black Belt calculates a p-value of 0.02 for a hypothesis test with α = 0.05. What is the correct conclusion?
Answer: Reject H₀; the result is statistically significant
Since p (0.02) < α (0.05), there is sufficient evidence to reject the null hypothesis; the result is statistically significant at the chosen significance level.
In a value stream map, which symbol typically represents a 'push' system between process steps?
Answer: A push arrow (straight arrow)
A straight push arrow in a value stream map shows that material is pushed downstream to the next process regardless of whether it is needed, often creating inventory.
Which quality cost category includes expenses for rework, scrap, and warranty claims?
Answer: Internal failure costs and external failure costs
Rework and scrap are internal failure costs (defects found before delivery), while warranty claims are external failure costs (defects found after delivery).