888-889 / 3107
10
15
Displacement (mm)
eNAL mechanism - 4
th
week
Correction for next week:
Measure set-up error in first fraction (only)
Derive new set-up correction from all
previously detected set-up errors that would
have occurred without corrections (linear
regression analysis)
Apply in next week
-5
0
5
0
5
10
15
20
25
30
35
Fraction
:
initial eNAL measurement (NAL)
:
weekly eNAL measurement
:
correction undone
linear regression line
New eNAL correction