Six Sigma SPC's
Quality Control Dictionary and Glossary
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6 Sigma Statistical Process Control (SPC) Software for Windows
A measurement, in percentage, of the total
number of defects detected divided by the total
number of samples observed.
Example, if you have 50 defects out of 100 samples, then...
50 / 100 = 0.5 or 50% (percent).
This rate is associated with the acceptable
quality level, , and (AQL) mean
time between failures, , but may also be related to (MTBF)
mean time to failure . Products could be tested using an (MTTF) accelerated
life test, . (ALT) External
Failures are sometimes measured.
Also see Burn In,
Common Cause, and Special
Cause and Bathtub curve.
Last Updated: Wednesday, 15-Mar-06 07:43:31 PST