351 / 879
N°
faisceau 1ère mesure 2ème mesure
1ère mesure 2ème mesure
1
-0,59% -0,39% -0,49% 0,20% -0,76% -0,44% -0,60% 0,32%
2
-0,21% -0,13% -0,17% 0,08% -0,44% -0,34% -0,39% 0,10%
3
-0,17% -0,19% -0,18% 0,02% -0,70% -0,47% -0,59% 0,23%
4
-1,19% -1,09% -1,14% 0,10% -1,19% -0,99% -1,09% 0,20%
5
-0,24% -0,40% -0,32% 0,16% -0,36% -0,59% -0,48% 0,22%
6
0,17% 0,20% 0,19% 0,03% -0,03% -0,26% -0,14% 0,23%
7
-0,67% -0,77% -0,72% 0,10% -0,85% -0,81% -0,83% 0,04%
8
-0,91% -0,66%
-0,78%
0,24% -1,09% -1,07% -1,08% 0,02%
9
-1,35%
-1,25% -1,30% 0,10% -1,39% -1,43% -1,41% 0,04%
10
-0,44% -0,24% -0,34% 0,21% -0,75% -0,71% -0,73% 0,04%
-0,52% 0,12%
-0,73% 0,14%
Opérateur 1
Opérateur 2
Moyenne de et = -0,63%
= Moyenne de et = 0,13%
R
R
X
X
X
1
R
1
X
2
R
2
R
X
1
X
2
R
1
R
2
Cpc
measure system
4
Observed dispersion
True Dispersion
Measure system statistically capable
M. Pillet (2005)
C
ONCLUSION
:
4. Verification of the capability of the measurement
system
M
EASURE
Without being able to measure, impossible to quantify changes.
Part 1
:
Introduction to
SPC
Part 2
:
Essential
concepts to
start with SPC
Part 4
Conclusion
Part 3
:
SPC in
practice
True dispersion of the
process
+
=
Observed
dispersion
Dispersion of the
measurement
system
Consider the measurement
as a process itself
•
Capability of the measurement system (Cpc)
Repeatability and Reproducibility study (Gage R&R))
Reproducibility
Repeatability
Pp observed
Pp true
Cpc = 1
Cpc = 1,5 Cpc = 2
Cpc = 4
Cpc = 100
Cpc = 3
2
2
ility
reproducib
ity
repeatabil
system
measure
system
measure
σ6
interval
ion
Specificat
system
measure
Cpc
03/10/17