The control chart used to measure the number of defects per


1. The control chart used to measure the number of defects per unit is called the

p-chart

r-chart

c-chart

u-chart

2. Fifty sample measurements of the length of an automotive component yield a grand mean of 1.33 inches with an estimated standard deviation of 0.2 inches. The specification length is between 1.2 and 1.4 inches. Is the process capable of meeting the required specifications?

YES

NO

Insufficient info to determine

Barely capable

3. On a control chart, how many successive data points on an increasing or decreasing line require an investigation for cause of progressive change?

7 or more

5 or more

4 or more

3 or more

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Operation Management: The control chart used to measure the number of defects per
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