The NP Control Chart. An alternative to the control chart for fraction defective is a
Chapter 16, Problem 16-68(choose chapter or problem)
The NP Control Chart. An alternative to the control chart for fraction defective is a control chart based on the number of defectives, or the NP control chart. The chart has centerline at n , and the control limits are and the number of defectives for each sample is plotted on the chart. (a) Verify that the control limits given above are correct.
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