Problem
5.
The
Commonwealth Banking Corporation issues a national credit card through its
various bank branches in five southeastern states. The bank credit card
business is highly competitive and interest rates do not vary substantially, so
the company decided to attempt to retain its customers by improving customer
service through a reduction in billing errors. The credit card division
monitored its billing department process by taking daily samples of 200
customer bills for 30 days and checking their accuracy. The sample results are
as follows:
|
Develop
a chart for the
billing process using control limits and
indicate if the process is out of control.
ScholarMatic: Explanation & Answer
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