Computer upgrades have a nominal time of 80 minutes. Samples of six observations each have been taken, and the results are as listed. Using factors from Table 10.3, determine upper and lower control limits for mean and range charts. Does the process is in control? Sample 2 3 4 5 73.7 75.0 74.1 73.4 75.0 73.3 73.2 74.1 73.9 74.1 74.5 75.5 74.9 74.2 74.9 72.9 74.9 74.8 73.9 75.3 75.5 74.6 75.3 75.1 73.3 74.2 75.1 75.0 74.5 75.6

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A: THE ANSWER IS AS BELOW:

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A:

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Statistical Process Control

The use of statistical methods to observe and manage a process to make sure that it operates at its full potential and thus produce a confirming product is called Statistical Process Control.