ICGB · Question #14
The higher the sigma level of a process the better the performance.
The correct answer is A. True. A (True) is correct because sigma level directly measures how many standard deviations fit between the process mean and the nearest specification limit - a higher sigma level means fewer defects per million opportunities (DPMO). For reference, a 3-sigma process yields ~66,800…
Question
The higher the sigma level of a process the better the performance.
Options
- ATrue
- BFalse
How the community answered
(57 responses)- A82% (47)
- B18% (10)
Explanation
A (True) is correct because sigma level directly measures how many standard deviations fit between the process mean and the nearest specification limit - a higher sigma level means fewer defects per million opportunities (DPMO). For reference, a 3-sigma process yields ~66,800 DPMO, while a 6-sigma process yields only ~3.4 DPMO, representing near-perfect performance.
B (False) is wrong because it inverts the relationship: a lower sigma level indicates more variation relative to tolerances, meaning more defects and poorer quality output.
Memory tip: Think of sigma as a "safety margin score" - the higher your score, the more cushion you have between your process output and the defect threshold, so higher always means better.
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