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the fault-tree compilerThe Fault Tree Compiler Program is a new reliability tool used to predict the top event probability for a fault tree. Five different gate types are allowed in the fault tree: AND, OR, EXCLUSIVE OR, INVERT, and M OF N gates. The high level input language is easy to understand and use when describing the system tree. In addition, the use of the hierarchical fault tree capability can simplify the tree description and decrease program execution time. The current solution technique provides an answer precise (within the limits of double precision floating point arithmetic) to the five digits in the answer. The user may vary one failure rate or failure probability over a range of values and plot the results for sensitivity analyses. The solution technique is implemented in FORTRAN; the remaining program code is implemented in Pascal. The program is written to run on a Digital Corporation VAX with the VMS operation system.
Document ID
19870011332
Document Type
Technical Memorandum (TM)
Authors
Martensen, Anna L.
(PRC Kentron, Inc. Hampton, Va., United States)
Butler, Ricky W.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1987
Subject Category
COMPUTER PROGRAMMING AND SOFTWARE
Report/Patent Number
NASA-TM-89098
NAS 1.15:89098
Funding Number(s)
PROJECT: RTOP 505-66-21-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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