Question

In the previous question, suppose that the management decides to use a p chart for the analysis. As noted earlier, 10% of produced items are known to be nonconforming.
The firm analyzes a batch of production items for 6 weeks and computes the following percentages of nonconforming items.
Week Nonconforming Percentage
1........... 5.5%
2........... 13.1%
3........... 16.8%
4........... 13.6%
5........... 19.8%
6........... 2.0%
a. Suppose weekly batches consisted of 50 items.
Construct a p chart and determine if the machine needs adjustment in any of the weeks.
b. Suppose weekly batches consisted of 100 items.
Construct a p chart and determine if the machine needs adjustment in any of the weeks.



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  • CreatedJanuary 28, 2015
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