A manager at a canning company wants to monitor the number of orange juice cans

Question

A manager at a canning company wants to monitor the number of orange juice cans it produces each day that are beyond the company's upper specification limit in diameter. The manager will have an employee randomly select 150 cans per day and determine if each of these cans are beyond the company's upper specification limit in diameter. The number of these sampled cans that are beyond the company's upper specification limit in diameter will be plotted on a control chart. Which of the following type of control chart would be most appropriate? A. -chart B. R-chart C. p-chart D. np-chart

Explanation / Answer

x-chart is used to check the deviation of dimension from mean by plotting the dimesion itself such as diameter.

R-chart is used to check the deviation is in range or not by plotting the range of the data

P chart is used to check the percentage of fraction defective by plotting fraction defectives.

np-chart or c-chart is used to check number of defectives defective by plotting number of defectives.

A np chart are used for monitoring the number of nonconforming units in a sample.

The np control chart

The np chart is especially easy and simple to make because the number of defective parts is plotted directly on the control chart. Because the proportion of nonconforming parts is not calculated, this control chart requires less time to make than does the p chart.

Hence the correct option is option (d)

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