QC Statistics and Rules
Additional QC Precision Rules
IMMAGE 800 Operations Manual A11403
Quality Control
September 2016
Page 9-5
9
10X Within or Across: Last Ten Results of One or Two Levels of Control Were
All on the Same Side of the Mean
This rule judges the result out-of-control if the last ten results from one or two levels
were all on the same side of the mean.
Figure 9.1
QC Accept/Reject Chart Using Westgard Rules
E015001L.EPS
ACCEPT/REJECT CHART
I
N
CO
N
TROL ACCEPT RU
N
Control
Data
2S
3S
2S
4S
1S
X
1
1
2
R
4
10
YES
YES
YES
N
O
N
O
N
O
N
O
N
O
N
O
YES
YES
YES
OUT - OF - CO
N
TROL REJECT RU
N
E
V
ALUATE