Question: Control charts for Xbar & Rare maintained on the tensile strength of a metal fastener. After 30 samples of size 6 are analyzed, it was

Control charts for Xbar & Rare maintained on the

Control charts for Xbar & Rare maintained on the tensile strength of a metal fastener. After 30 samples of size 6 are analyzed, it was found that: Sum of Xbar = 12,870 & sum of R= 1,350 Requirements: a. Compute control limits on the R chart b. Assuming the R chart exhibits control, estimate the parameters of u&o c. If the specifications are 440+40, can the process meet these specifications? Calculate the fraction nonconforming. d. If the Variance remains constant, wher the mean should be located to minimize the fraction nonconforming

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