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Calculate the central line and variable control limits of P chart using 3-sigma control limits and indicate the values that are out of control?

written 6.3 years ago by

h.p3576 • 220

modified 2.1 years ago by

sagarkolekar ★ 11k

A certain product is given 100% inspection as it is manufactured and the resultant data are summarized by the hour in following table 16 hrs of data is recorded. Calculate the central line and variable control limits of P chart using 3-sigma control limits and indicate the values that are out of control?

Hour Inspected	No. of units outside spec.	Number of Units
1	48	5
2	36	5
3	50	0
4	47	5
5	48	0
6	54	3
7	50	0
8	42	1
9	32	5
10	40	2
11	47	2
12	47	4
13	46	1
14	46	0
15	48	3
16	39	0

mechanical vibrations

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Hour Inspected	No. of units outside spec.	Number of Units
1	48	5
2	36	5
3	50	0
4	47	5
5	48	0
6	54	3
7	50	0
8	42	1
9	32	5
10	40	2
11	47	2
12	47	4
13	46	1
14	46	0
15	48	3
16	39	0

Hour Inspected	No. of units outside spec.	Number of Units
1	48	5
2	36	5
3	50	0
4	47	5
5	48	0
6	54	3
7	50	0
8	42	1
9	32	5
10	40	2
11	47	2
12	47	4
13	46	1
14	46	0
15	48	3
16	39	0

Hour Inspected	No. of units outside spec.	Number of Units
1	48	5
2	36	5
3	50	0
4	47	5
5	48	0
6	54	3
7	50	0
8	42	1
9	32	5
10	40	2
11	47	2
12	47	4
13	46	1
14	46	0
15	48	3
16	39	0