Chip Technologies manufactures personal computers for large chain electronic retail outlets. Each day several orders are selected

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Chip Technologies manufactures personal computers for large chain electronic retail outlets. Each day several orders are selected at random and each computer carefully inspected against a check list. The total defects are recorded and plotted on a control chart. Since orders vary in size, the total number of computers inspected differs each day. The results for 20 days of inspection are shown in the table below.
a. Analyze this process using an appropriate control chart. What would be your recommendations to the plant manager?
b. A Six Sigma team was formed to investigate the defect problem. Some changes were implemented, aimed at stabilizing the process. After all workers had been thoroughly trained in the new procedures, data were collected for a 20-day period and are summarized in the table.
Chip Technologies manufactures personal computers for large chain electronic retail
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