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Minimal Cut Sets
================
Tree : top.fta
Time : Mon Apr 07 23:48:16 2014
Method : Algebraic
No. of primary events = 2
Minimal cut set order = 1 to 2
Order 1:
1) a
2) b
Order 2:
Qualitative Importance Analysis:
Order Number
----- ------
1 2
2 0
ALL 2
Probabilities Analysis
======================
Tree : top.fta
Time : Mon Apr 07 23:48:49 2014
Number of primary events = 2
Number of minimal cut sets = 2
Order of minimal cut sets = 2
Unit time span = 1.000000
Minimal cut set probabilities :
1 a 1.000000E-001
2 b 2.000000E-001
Probability of top level event (minimal cut sets up to order 2 used):
1 term +3.000000E-001 = 3.000000E-001 (upper bound)
2 terms -2.000000E-002 = 2.800000E-001 (lower bound)
Exact value : 2.800000E-001
Primary Event Analysis:
Event Failure contrib. Importance
a 1.000000E-001 35.71%
b 2.000000E-001 71.43%
Monte Carlo Simulation
======================
Tree : top.fta
Time : Mon Apr 07 23:51:19 2014
Note: Only runs with at least one component failure are simulated
Number of primary events = 2
Number of tests = 10000
Unit Time span used = 1.000000
Number of system failures = 10000
Probability of at least = 2.800000E-001 ( exact )
one component failure
Probability of top event = 2.800000E-001 ( +/- 2.800000E-003 )
Rank Failure mode Failures Estimated Probability Importance
1 b 6453 1.806840E-001 ( +/- 2.249256E-003 ) 64.53%
2 a 2873 8.044400E-002 ( +/- 1.500810E-003 ) 28.73%
3 a b 674 1.887200E-002 ( +/- 7.269223E-004 ) 6.74%
Compressed:
Rank Failure mode Failures Estimated Probability Importance
1 a 3547 9.931600E-002 ( +/- 1.667588E-003 ) 35.47%
2 b 7127 1.995560E-001 ( +/- 2.363804E-003 ) 71.27%
Primary Event Analysis:
Event Failure contrib. Importance
a 9.931600E-002 35.47%
b 1.995560E-001 71.27%
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