FREE Certified Six Sigma Black Belt Questions and Answers Flashcards
6 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.
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What does a negative Cpk value indicate about a process?
Answer: The process mean lies outside the specification limits
A negative Cpk means the process mean has shifted beyond one of the specification limits, indicating the process is producing mostly defective output.
During the Measure phase, a Black Belt discovers the measurement system accounts for 45% of total observed variation. What should be done first?
Answer: Improve the measurement system before collecting process data
A measurement system contributing 45% of variation is unacceptable and must be improved before reliable process data can be collected.
Which lean waste category does excess Work-In-Process inventory between process steps represent?
Answer: Inventory
Excess WIP between process steps is classified as inventory waste, one of the eight wastes in lean methodology.
What is the purpose of a Box-Cox transformation in Six Sigma analysis?
Answer: To transform non-normal data to approximate normality
The Box-Cox transformation applies a power function to data to make it more closely follow a normal distribution for valid statistical analysis.
In a multi-vari study, which source of variation occurs between different parts produced at approximately the same time?
Answer: Part-to-part variation
Part-to-part variation captures the differences among individual units produced under similar conditions at roughly the same time.
A Black Belt wants to determine if there is a linear relationship between temperature and yield. Which tool is most appropriate?
Answer: Simple linear regression
Simple linear regression models the relationship between one continuous predictor and one continuous response to determine if a linear association exists.