I propose to use the example of a runway instead. Everybody can imagen that you would like the pilot to land at the middle of the runway each time.
-gr, JVP <span style="font-size: smaller;" class="autosigned">—Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/145.36.63.11|145.36.63.11]] ([[User talk:145.36.63.11|talk]]) 14:45, 20 January 2011 (UTC)</span><!-- Template:UnsignedIP --> <!--Autosigned by SineBot-->
I corrected the notation for "variability of the process" to standard deviation to avoid confusion between sigma and sigma squared, variance/variability, and standard deviation.
Hyoga 11/26/2007
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There is no point in listing an equation if you are not going to define what the variables mean. Namely, what on earth is do USL and LSL stand for? Even sigma should be defined for those who do not know what they are looking at.
:Fixed. --mabahj 11:00, 12 July 2006 (UTC)
USP - Upper Specification Limit
LSL - Lower specification Limit
These are related to statistical process control (SPC).
