The Measure Phase Flashcards
7 cards from real Lean Six Sigma Yellow 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 The Measure Phase flashcards as text
The Cp index measures process capability without regard to centering. What additional index accounts for process centering?
Answer: Cpk
Cpk adjusts for the process mean's location relative to the specification limits, penalizing a process that is off-center.
Which tool is used in the Measure phase to visually show where defects occur on a physical product or diagram?
Answer: Defect concentration diagram (measles chart)
A defect concentration diagram (measles chart) marks defect locations on a drawing of the product to reveal spatial patterns.
When establishing a baseline process capability, which condition must be met first?
Answer: The process must be in statistical control
Process capability indices are only meaningful when the process is stable (in statistical control), otherwise capability calculations are invalid.
A box plot (box-and-whisker plot) displays all of the following EXCEPT:
Answer: Exact raw data values
Box plots summarize the distribution showing median, quartiles, range, and outliers, but they do not display individual raw data values.
In process mapping during the Measure phase, a 'value-added' step is one that:
Answer: Transforms the product in a way the customer cares about and would pay for
A value-added step physically transforms the product or service in a way the customer recognizes and is willing to pay for.
Which measurement scale has a true zero point and allows meaningful ratio comparisons?
Answer: Ratio
A ratio scale has a true zero point, meaning zero represents absence of the attribute, enabling meaningful ratios (e.g., 20 kg is twice 10 kg).
What does a high Gauge R&R percentage (e.g., >30%) relative to total variation indicate?
Answer: The measurement system contributes too much variation and needs improvement
When Gauge R&R exceeds 30% of total variation, the measurement system is considered unacceptable and must be improved before data is reliable.