A syringe manufacturing company developed a control chart for monitoring the out

Question

A syringe manufacturing company developed a control chart for monitoring the outside diameter of a syringe. Beginning at 7 AM this morning, hourly checks showed the mean outside to diameter to be within the chart control limits. Suddenly, the 2 PM check was above the upper control limit. Which of the following best describes this situation? O This is likely a random occurrence and production should be maintained The wrong control chart was used O This indicates that production is statistically out of control and special cause variation may be present This means that an error has been made in the calculation of the control limits

Explanation / Answer

A. This is a case of a random occurance of a value higher than the control limit and will not affect the quality of product.

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