A. Technical appendix
A-10
Festo GDCA-CHB-C-N en 1508e English
A.3 Examples for calculation of the features
A.3.1 Band width and tolerance
The band width B specifies how far the value of the feature
may vary upwards or downwards.
The tolerance T specifies the percentage increase in the band
width of each feature, related to the average value of the fea
ture.
C
max tol
+ C
max
)A
T
100
C
min tol
+ C
min
*A
T
100
B + C
max tol
*C
min tol
+ C
max
* C
min
)
2 T A
100
³ T +
B*(C
max
* C
min
)
2 A
100
A
B
C
max
C
max
tol
C
min
C
min
tol
T
Average value of the feature
Band width
Feature maximum
Upper limit of the band width incl. tolerance
Feature minimum
Lower limit of the band width incl. tolerance
Tolerance