请帮我分析下这个失败的MSA，急！！！

MEASUREMENT SYSTEM ANALYSIS （VARIABLE )
Part Name : XXX Gage Name : Vernier Caliper Date : 11/09/2007
Part Tolerance : 0.15
Specification : 21.50+0.15/-0.15

Characteristics
Trial Data Trials Data Trial Data
Part
Part No 1 st 2 nd 3 rd Range 1 st 2 nd 3 rd Range 1 st 2 nd 3 rd Range Average
1 21.58 21.58 21.57 0.01 21.57 21.58 21.58 0.01 21.57 21.58 21.57 0.01 21.5756
2 21.57 21.57 21.56 0.01 21.61 21.60 21.60 0.01 21.58 21.59 21.59 0.01 21.5856
3 21.54 21.55 21.55 0.01 21.60 21.59 21.60 0.01 21.56 21.56 21.57 0.01 21.5689
4 21.57 21.57 21.57 0.00 21.59 21.60 21.58 0.02 21.58 21.58 21.59 0.01 21.5811
5 21.59 21.58 21.58 0.01 21.58 21.59 21.58 0.01 21.58 21.58 21.58 0.00 21.5822
6 21.56 21.56 21.57 0.01 21.58 21.58 21.59 0.01 21.58 21.58 21.57 0.01 21.5744
7 21.57 21.57 21.56 0.01 21.60 21.59 21.61 0.02 21.58 21.58 21.59 0.01 21.5833
8 21.56 21.56 21.57 0.01 21.62 21.60 21.61 0.02 21.58 21.60 21.59 0.02 21.5878
9 21.57 21.57 21.56 0.01 21.60 21.61 21.60 0.01 21.59 21.59 21.61 0.02 21.5889
10 21.55 21.55 21.56 0.01 21.59 21.57 21.58 0.02 21.57 21.57 21.56 0.01 21.5667


Totals 215.66 215.66 215.65 215.94 215.91 215.93 215.77 215.81 215.82
431.32 0.0090 431.85 0.0140 431.58 0.0110 0.0222
215.65 R|Bar 1 215.93 R|Bar 1 215.82 R|Bar 1 Rp
Sum 646.97 Sum 647.78 Sum 647.4
X|Bar 1 21.57 X|Bar 2 21.59 X|Bar 3 21.58

R|Bar 1 0.0090 Trial # D 4 R Bar All x D 4 = UCL r Max X|Bar 21.59
R|Bar 2 0.0140 Min X|Bar 21.57
R|Bar 3 0.0110 2 3.27 = 0.02924 X|Bar Diff 0.0270
Sum 0.0340 3 2.58
R|Bar All 0.0113

2.58 0
Measurement Unit Analysis Percent Tolerance Analysis


Trials 2 3 4
Repeatability - Equipment Variation (EV) K1 4.56 3.05 2.50 %Study Var %Tolerance
%EV = 100(EV/TV) Repeatability
EV = R|Bar x K1 sEV =EV/5.15 = 0.006711974
% EV = 39.23 = 23.04 %
EV = 0.0346



Reproducibilty - Operator Variation (OV) Operators 2 3 4
K2 3.65 2.70 2.30

OV = SQRT ((X-Bar Diff x K2)2 - ) K2= 2.7 %Study Var %Tolerance
n= 10 %OV = 100(OV / TV) Reproducibility
OV = 0.0726 r= 3
sOV =OV/5.15 = 0.01410 %OV = 82.42 = 48.4 %


Gage Repeatability and Reproducibility (GR&R)
%Study Var %Tolerance
%GR&R = 100(R&R/TV) Total Gage R&R
GR&R = SQRT (EV2 + OV2)
%GR&R= 91.27 = 53.62 %
GR&R = 0.0804 s R&R = R & R / 5.15 = 0.01562


Part Variation (PV) Part 2 3 4 5 6 7 8 9 10
K3 3.65 2.70 2.30 2.08 1.93 1.82 1.74 1.67 1.62

%Study Var %Tolerance
PV = Rp x K3 %PV = 100(PV/TV) Part to Part

PV = 0.0360
%PV = 40.85 = 24.00 %


Result: FAILED NDC = 1.41(PV/R&R)
NDC = 0
Remark: The measurement system is NOT ACCEPTABLE