Answer:
Explanation:
SAMPLE
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Number of Errors 5 3 5 7 4 6 8 4 5 9 3 4 5 8 6 7
Average Defectives calculated by
This generates 87/ 16 (100) = 0.54. In order to obtain control limits, we apply the formula
Implying that
= 0.54 ± 0.044, this indicates that
The upper control limit = 0.54 + 0.044 = 0.10 (following conversion into fraction forms)
The lower control limit = 0.54 – 0.044 = 0.01 (following conversion into fraction forms)
From the calculation and table above, it is ideal to conclude that the process is out of control. This is because ¾ of the values appear to be above 0.04 despite all values falling within the limits.
