Question: 1. (From sigma value to DPM and capability index) Consider the following processes: (i) 5-sigma quality with 1.5-sigma off-centering. (ii) 3.5-sigma quality with 1.0-sigma off-centering.

1. (From sigma value to DPM and capability index)

1. (From sigma value to DPM and capability index) Consider the following processes: (i) 5-sigma quality with 1.5-sigma off-centering. (ii) 3.5-sigma quality with 1.0-sigma off-centering. (a) Draw the process distribution curves separately for the two processes. Clearly show the target value, USL and LSL. (b) Compute the number of defective parts per million parts produced (DPM) for each process. Which has a better DPM? (c) Compute Cp and Cpk for the two processes. Comment

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