Fault Tree Sheets in BlockSim FTI - Click to EnlargeBlockSim supports all of the following fault tree analysis diagram configurations.

Fault Tree Diagrams with AND Gate Configurations

If both input events (A and B) occur, then the output event (system failure) will occur.

Fault tree diagram with AND gate configuration.

Fault Tree Diagrams with OR Gate Configurations

If any of the input events (A or B or C) occurs, then the output event (system failure) will occur.

Fault tree diagram with OR gate configuration.

Fault Tree Diagrams with Voting OR Gate Configurations

If a specified number of the input events occur (A and B, A and C, or B and C), then the output event (system failure) will occur.

Fault tree diagram with Voting OR gate configuration.

Fault Tree Diagrams with Inhibit Gate Configurations

If the input events (A and B) and another conditional event (C) occur, then the output event (system failure) will occur.

Fault tree diagram with Inhibit gate configuration.

Fault Tree Diagrams with Load Sharing Gate Configurations

The probability of occurrence for each input event (BA, BB and BC) is dependent on the occurrence of the other events.

Fault Tree Diagrams with Standby Gate Configurations

If the active input event (A) occurs then the standby input events (B and C) occur, then the output event (system failure) will occur.

Fault tree diagram with Standby gate configuration.

Fault Tree Diagrams with Combinations of Gates

The output event (system failure) will occur if A, B, C or D occurs or if 2 out of three of E, F or G occurs or if any of H, I, J, K or L occurs and any of M, N, O or P and Q occurs.

Fault tree diagram with complex configuration including AND, OR and Voting OR gates.