Fault tree analysis
System reliability from a fault tree of three series blocks (A, B, C) followed by two redundant pairs (D+E, F+G).
Operating reliability, R(t)0.677
Failure probability, F(t) = 1 − R(t)0.323
Method & references
- Fault tree analysis — series blocks with redundant (parallel) sub-pairs.
The computation is a literal port of the original client-side JavaScript from /calculators/p1_4.htm. Results are verified equal to the original by an automated golden-master test. No formula has been re-derived or “improved”.