Fault Classes – Mentor Terminology

Untestable Faults – UT
- Unused – UU
- Tied – TI
- Blocked – BL
- Redundant – RE
Testable Faults
- Detected – DT
  - det_simulation – DS (faults detected when the tool performs fault simulation)
  - det_implication – DI (faults detected when the tool performs learning analysis)
  - det_robust
  - det_functional
- Posdet – PD
  - posdet-testable – PT (Can be detected by increasing the test generator abort limit)
  - posdet-untestable – PU
- ATPG Untestable – AU (Cannot be detected by increasing the test generator abort limit)
- Undetected – UD
  - Uncontrolled – UC
  - Unobserved – UO

Prasad Addagarla