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Publish On: 2019-05-08

Guy white

Total Post: 819

Question: What are control charts and how they are useful in statistical specification and inspection

Reply On: 2013-07-23

Gaurabh Raghav

Total Post: 33

ANS: What are control charts and how they are useful in statistical specification and inspection

A control chart is a statistical device principally used for the study and control of repetitive processes. Dr. Walter A. Shewhart. Its originator, suggested that control chart may serve, first to defined the goal or standard for the process that the management might strive to attain secondly it may be used as an instrument to attain that goal: and, thirdly, it may serve as a means of judging whether the goal is being achieved, thus it is an instrument to be used in specification and inspection and is the core of statistical quality control.

A control chart is essentially a graphic device for presenting data so as to directly reveal the frequency and extent of variations from established standards of goals. Control charts are simple to construct and easy to interpret and they tell the manger at a glance whether or not the process is in control within the tolerance limits.

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