Question: =+cause variation is considered to be expected, but uncontrollable variation. Controllable variation, on the other hand, is variation for which we can find definite assignable

=+cause variation is considered to be expected, but uncontrollable variation. Controllable variation, on the other hand, is variation for which we can find definite assignable causes, also called special causes. Assignable causes are frequently found when there are changes in brands of raw materials, turnover in the workforce, or machine wear or breakdown. Control charts are designed as a method for detecting the existence of assignable causes.

Control Charts

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