Manufacturing involves an attempt to produce items that as closely as possible meet design specifications (e.g., size, strength, etc.).
However, all production processes exhibit variation - that is, no two items are identical. What method can be used to reduce such variation? The classic and still most widely used method is called SPC or "statistical process control". SPC is a statistical tool that objectively identifies when it is worthwhile to perform a formal investigation of manufacturing variation, in order to identify and reduce its cause.
NetZealous - Compliance4All,
161 Mission Falls Lane, Suite 216,
Fremont, CA 94539, USA.
Event Link : http://bit.ly/Introduction-to-SPC-Statistical-Process-Control