5.4 Case Study 2: Shared Dependent Event
Figure 5.4 illustrates the DFT of an example system with dependent event C shared by two FDEP gates. Table 5.5 gives five sets of input component failure parameters and coverage factors. All the system components have exponential ttf distributions. The r factor is assumed to be ZERO for all the system components. Mission time of t = 10 000 hours is considered.
Figure 5.4 Example system with shared dependent events.
Table 5.5 Input component failure parameters and coverage factors.
| Set 1 | Set 2 | Set 3 | Set 4 | Set 5 | |
| λA | 1e−5 | 1e−5 | 1e−5 | 1e−5 | 1e−5 |
| λB,C,D,E | 1e−5 | 1e−4 | 1e−4 | 1e−4 | 1e−4 |
| cA | 0.9 | 0.9 | 0.9 | 0.9 | 1 |
| cB | 0.9 | 0.9 | 0.5 | 0.9 | 1 |
| cC | 0.9 | 0.9 | 0.5 | 0.9 | 1 |
| cD, cE | 1 | 1 | 1 | 0.9 | 1 |
The ITE space contains four ITEs:
5.8
ITE 1 = A ¯ ∩ E ¯ , ITE 2 = A ¯ ∩ E , ITE 3 = A ∩ E ¯ , ITE 4 ...