Logical fault models
Logical faults represent the effect of physical faults on the behavior of the system.
Why we model physical faults as logical ones:
complexity of simulation reduces (many physical faults may be modeled by the same logical fault);
one logical fault model is applicable to many technologies;
logical fault tests may be used for physical faults whose effect is not completely understood.
Logical fault models may be: explicit and implicit:
explicit faults may be enumerated;
implicit faults are given by some characterizing properties.
Logical faults may be: structural and functional: