Assignment:
After the stamping operation, door panels are periodically selected for a detailed examination in which the number of surface scratches, dents, and other flaws are counted. During today’s production run, 20 panels were inspected. Given the data in the table, construct a 3-sigma c-chart, then reach a conclusion regarding whether the process is in control.
|
Panel
Number
|
c = Number
of Surface
Defects
|
Panel
Number
|
c = Number
of Surface
Defects
|
|
I
|
1
|
11
|
8
|
|
2
|
2
|
12
|
5
|
|
3
|
4
|
13
|
5
|
|
4
|
6
|
14
|
4
|
|
5
|
1
|
15
|
2
|
|
6
|
5
|
16
|
6
|
|
7
|
1
|
17
|
2
|
|
8
|
3
|
18
|
3
|
|
9
|
11
|
19
|
4
|
|
10
|
12
|
20
|
4
|
Provide complete and step by step solution for the question and show calculations and use formulas.