Question: Assume that the quality characteristic is normally distributed. ( a ) Compute control limits for the x and R controlcharts. ( b ) All points

Assume that the quality characteristic is normally distributed.(a) Compute control limits for the x and R controlcharts.(b) All points on both control charts fall between thecontrol limits computed in part (a). What are thenatural tolerance limits of the process?(c) If the specification limits are 41\pm 5.0, what are your conclusions regarding the ability of the process to produce items within these speci-fications?(d) Assumingthatifanitemexceedstheupperspec-ification limit it can be reworked, and if it is below the lower specification limit it must be scrapped, what percentage scrap and rework is the process producing?(e) Make suggestions as to how the process perfor- mance could be improved.

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