SOS:请高手分析及解答(GRR)

各位高手:
请帮我分析以下计算:
APPRAISER/ PART AVERAGE
TRIAL# 1 2 3 4 5 6 7 8 9 10
1 A 1 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005
2 2 8.004 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005
3 3
4 Average 8.0045 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.00495
5 Range 0.001 0 0 0 0 0 0 0 0 0 0.0001

6 B 1 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005
7 2 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005
8 3
9 Average 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005
10 Range 0 0 0 0 0 0 0 0 0 0 0

11 C 1 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005
12 2 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005
13 3
14 Average 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005
15 Range 0 0 0 0 0 0 0 0 0 0 0

16 Part 8.004833333 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.005 8.004983333
Average(Xp) Rp 0.000166667
17 R2 3.33333E-05
18 Xdief 5E-05
19 0.000109
20 0


EV 0.000152 AV 0.000130651 R&R 0.000200434 PV 0.00027 TV 0.000336264
EV% 45.2025145 AV% 38.85377515 R&R% 59.60606648 PV% 80.29394024
郁闷,为何会出现这样的结果?????????????????????
可能大家看不清楚,我是人为编的数据,即:
三拾个数据,29个8.005 ,一个8.004,计算后R&R%=59%.是那里有问题?(公式不错)是我的理解有问题吗???
再问:1)如取10个工件(测量外圆),假如工件椭园度很大(每人测量点不一样)而R&R<30%,你能说检具能力不够吗?我的理解有问题吗???
2)MINITAB13如何算GAGE R&R?最好告诉我步骤

期待专家解答!!!!!!

谢谢