BPM-001 · Question #45
Six Sigma strives to have a process operate at 99% efficiency.
The correct answer is B. False. B is correct because Six Sigma does not target 99% efficiency - it targets 99.99966% efficiency, or no more than 3.4 defects per million opportunities (DPMO). The "Six Sigma" name refers to six standard deviations between the process mean and the nearest specification limit…
Question
Six Sigma strives to have a process operate at 99% efficiency.
Options
- ATrue
- BFalse
How the community answered
(19 responses)- A11% (2)
- B89% (17)
Explanation
B is correct because Six Sigma does not target 99% efficiency - it targets 99.99966% efficiency, or no more than 3.4 defects per million opportunities (DPMO). The "Six Sigma" name refers to six standard deviations between the process mean and the nearest specification limit, which mathematically yields that near-perfect defect rate.
A is wrong because 99% efficiency sounds impressive but is actually inadequate by Six Sigma standards. To illustrate: 99% efficiency on 1 million airline flights would mean ~10,000 crashes - clearly unacceptable. Six Sigma's 99.99966% target would reduce that to ~3 crashes.
Memory tip: Think "Six Sigma = six 9s of quality" - the target is roughly 99.9997%, far beyond a simple 99%. If a question claims Six Sigma targets anything less than ~99.999%, it's false.
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