Multiple choice six-sigma green-belt

6 sigma process means

  1. LSL & USL are three standard deviations away from the mean

  2. Six standard deviations between LSL & USL

  3. Six standard deviations between mean and farthest specification limit

  4. 12 standard deviations between LSL and USL
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D Correct answer
Explanation

A Six Sigma process is defined as having six standard deviations (sigmas) between the process mean and the nearest specification limit. This equates to a total of 12 standard deviations across the entire range from the Lower Specification Limit (LSL) to the Upper Specification Limit (USL).

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