Question: A small manufacturer of metal ring seals for aircraft engines has been asked by its major customer to implement SPC. One major type of ring
A small manufacturer of metal ring seals for aircraft engines has been asked by its major customer to implement SPC. One major type of ring requires cutting a one-eighth inch wide slot using a milling machine. The following six samples of five observations each, taken every' half hour, are the width of the slots (in inch) made by the milling machine on the rings.
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a. Set up the sample mean and range control charts for this operation, Is the process in control?
b. The seventh sample contains the following values: 0.124, 0.1252, 0.1295, 0.1262, and 0.1275. Using the control charts from part a, is the process still in control?
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a For n 5 from Table 102 A 2 58 D 3 0 and D 4 211 Mean ... View full answer
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