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Unformatted text preview: 1.995 .006 2.005 2.33 2.58 As the quality engineer for the company you are required to help set up the SPC charts to be used. Answer the questions below: 1. Using deviation from nominal for centering, give the formulas and values for the control limits and centerline for the following charts. Give the formula only that you would use for the plot points for the each chart. (20 points): Centerline UCL LCL Plot Point Formula Nominal x (a.k.a. DNOM chart) Nominal R (a.k.a. DNOM chart) Standardized x Standardized R 2. Under what circumstances is it appropriate to use CUSUM or EWMA charts? (5 points) 3. Would you recommend using any of the charts mentioned in question 3 with parts A, B, or C above? Defend your answer.(5 points)...
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 Spring '09

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