A Japanese compact disc (CD) manufacturer has a daily production rate of about 20,000 CD-RW (rewritable disks). Quality is monitored by randomly sampling 200 finished CDs every other hour from the production process and testing them for defects. If one or more defects are discovered, the CD is considered defective and is destroyed. The production process operates 20 hours per day, 7 days a week. The table below reports data for the last 3 days of production.

a. Construct a p-chart for the CD-RW production process.
b. What does it indicate about the stability of the process? Explain.

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Number of Defectives Number of Defectives Day Hour Day Hour 1 으5232 31211 60 2.