Consider the U chart for printed circuit boards in Example
Chapter 15, Problem 72E(choose chapter or problem)
Consider the \(U\) chart for printed circuit boards in Example 15-5. The center line \(=1.6\),
\(U C L=33\) . , and \(n=5\).
(a) Calculate the \(L C L\) and \(U C L\).
(b) Suppose that the true mean defects per unit shifts from 1.6 to 2.4. What is the ARL after the shift? Assume that the average defects per unit are approximately normally distributed.
(c) Rework part (b) if the true mean defects per unit shifts from 1.6 to 2.0 and comment on the difference in ARL.
Equation Transcription:
Text Transcription:
U
=1.6
UCL=33
n=5
LCL
UCL
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