A product is manufactured to meet an upper specification limit of 150.0 and a lower specification limit
Question:
a. To ensure that no more than 0.135% of the product fails to meet each specification limit, over what range (high and low) can the process average be permitted to drift?
Calculate the upper control limit for the highest process average computed in part a and the lower control limit for the lowest process average.
b. Comment on the pros and cons of using a modified control chart using the limits computed in part b to control this process.
c. What would you expect the values of the centerline and control limits to be for an R chart to control this process?
d. What would you expect the values of the centerline and control limits to be for an R chart to control this process?
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Related Book For
Quality Inspired Management The Key to Sustainability
ISBN: 978-0131197565
1st edition
Authors: Harold Aikens
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