Information Technology Reference
In-Depth Information
TABLE 18.8
Combinational and Interaction Effects
Factor
Combination
Interaction
AB
0.09
0.00
AC
0.09
0.17
AD
0.09
0.17
AE
0.09
0.25
AF
0.04
0.00
AG
0.15
0.00
AH
0.36
0.00
BC
0.26
0.39
BD
0.14
0.14
BE
0.17
0.19
BF
0.42
0.78
BG
0.22
0.11
BH
0.39
0.22
CD
0.14
0.22
CE
0.17
0.36
CF
0.22
0.44
CG
0.12
0.03
CH
0.26
0.06
DE
0.07
0.11
DF
0.12
0.19
DG
0.12
0.03
DH
0.26
0.11
EF
0.12
0.22
EG
0.16
0.01
EH
0.23
0.01
FG
0.20
0.06
FH
0.42
0.11
GH
0.62
0.44
2. Combination of signal factors
a. Current process: DFSS team tend to check only where the bug may exist
and unconsciously neglect the combinations that users probably do not use.
b. Orthogonal array: This method is regarded as systematic. Through nonsub-
jective combinations that do not include debug engineers' presuppositions,
a well-balanced and broadband checkup can be performed.
3. Labor required
a. Current process: After preparing a several-dozen-page checksheet, they have
to investigate all its checkpoints.
b. Orthogonal array: The only task they need to do is to determine signal
factors and levels. Each combination is generated automatically. The number
of checkups required is much smaller, considering the number of signal
factors.
Search WWH ::
Custom Search