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Five data entry operators work of Data Processing department each day for 20 working days the number of defective records in a sample of 250
Five data entry operators work of Data Processing department each day for 20 working days the number of defective records in a sample of 250 records typed by these operators has been noted, as follows: | |||||||||||
SampleNo. | No. Defective | SampleNo. | No. Defective | ||||||||
1 | 7 | 11 | 12 | ||||||||
2 | 5 | 12 | 5 | ||||||||
3 | 10 | 13 | 20 | ||||||||
4 | 10 | 14 | 4 | ||||||||
5 | 11 | 15 | 11 | ||||||||
6 | 8 | 16 | 8 | ||||||||
7 | 6 | 17 | 12 | ||||||||
8 | 9 | 18 | 4 | ||||||||
9 | 6 | 19 | 6 | ||||||||
10 | 13 | 20 | 25 | ||||||||
a) Establish a three-sigma control chart for monitoring the number of defective records. | |||||||||||
.0749 .0019 | What is the upper limit? | ||||||||||
What is the lower limit? | |||||||||||
b) Based on the chart created in (a), was there any day when the process was not in control? Which days? | |||||||||||
c) What action or corrective action would you suggest to eliminate the out of control event? | |||||||||||
d) The industry standards are 0.10 and 0.01, respectively. What does this imply about Georgia Bank's own standards? |
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