Question

The data in the worksheet provides the number of defects produced in a series of panels. a. Construct a C-chart for this process. b. Does the process appear to be in control? Why or why not?

Panel	Defects / Panel
1	2
2	12
3	9
4	13
5	8
6	10
7	11
8	7
9	9
10	10
11	6
12	9
13	13
14	12
15	15
16	4
17	9
18	10
19	5
20	6
21	10
22	19
23	8
24	8
25	5

Answer 1

Answer:

a) and b)

The c chart for the number of defect per panel is,

By using Excel software,find c chart with the help of following steps:

1)Import the data.

2) Select Quality control Process Chart from Megastat in Add -Ins menu.

3) Choose Input Range and Number of Defects.

4)Click Ok.

Quality Control Process Charts

Numbers of samples 25

	Defects per sample
Upper Control Limit-UCL	18.299
Center	9.200
Lower Control Limit-LCL	0.101

Control Chart For the Number of Defects

From the Excel output ,the c chart for the number of defect per panel concludes there are 1 data point is fall out of control limits is 19,So the process is not under statistics quality control.