Question

Use the data in the table below to set up short-run X-bar and R charts using the DNOM approach. The nominal dimensions for each part are TA = 50, TB = 75, TC = 60, TD = 100, and TE = 125.

Sample	Part	M1	M2	M3
1	A	51	50	51
2	A	48	50	52
3	A	50	52	48
4	A	49	51	54
5	A	47	45	52
6	A	49	50	51
7	B	73	74	74
8	B	76	74	75
9	B	77	73	75
10	B	77	75	74
11	B	75	75	75
12	B	76	74	74
13	C	62	59	61
14	C	60	58	60
15	C	60	59	61
16	D	101	98	99
17	D	102	102	99
18	D	98	100	98
19	D	103	102	102
20	D	100	101	99
21	E	125	124	122
22	E	123	124	124
23	E	126	128	126
24	E	126	124	128
25	E	126	121	122

Answer 1

Sol:

step 1:calculate xi using Mi as follows

Using these values plot Xbar R chart in minitab

observing obove chart we can conclude that process is under control

If you Satisfy with Answer, Please give me "Thumb Up". It is very useful for me.
Thank you for your support.