Question: The Pacific Fruit Company has designed its packaging process for boxes to hold a net weight (nominal value) of 9.0 oz of raisins with tolerances

The Pacific Fruit Company has designed its packaging process for boxes to hold a net weight (nominal value) of 9.0 oz of raisins with tolerances of plus or minus 0.5 oz. Given a process mean of 9.00, an average range of 0.57 and a UCL of 1.21 and a LCL of 0, compute the process capability ratio and index.

Cp = Round your answer to 2 decimal places, the tolerance is +/-0.05

Cpk= Round your answer to 2 decimal places, the tolerance is +/-0.05

Which of the following statements is true concerning the process capability ratio and index?

capable or incapable, centered or uncentered

****Note from teacher***Finding sigma (standard deviation) You have to work backwards to solve for sigma. Follow my logic below.

The formulas for the UCL and LCL are

(X-bar) +/- (margin of error)the margin of error = 0.33 - this is a given value - just accept and use (

X-bar) +/- (3*sigma)....solve for sigma

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