Accession Number : ADA134746

Title :   Program for the Analysis of Fault Trees.

Descriptive Note : Research rept.,


Personal Author(s) : Feo,T A

PDF Url : ADA134746

Report Date : Oct 1983

Pagination or Media Count : 41

Abstract : Document describes PAFT F77, a program for the analysis of fault trees coded in Fortran 77. Given the structure of a fault tree and the probability or failure rates of its basic events, PAFT F77 calculates the probabilities of the top and all intermediate events, as well as the marginal importances of all basic events. When the input is in terms of failure rates instead of probabilities, the marginal occurrence rates of all basic events and the occurrence rate of the top event are also calculated. This additional information though, is invalid for fault trees comprising NOT gates or those gate types that must be modeled with NOT gates such as exculsive OR gates. The program is designed to handle simple fault tress and those with replicated basic events. The introduction to this text describes the program's ability and limitations together with a brief theoretical review of fault trees analysis. The second section is a users guide to PAFT F77 on the UNIX operating system at the University of California, Berkeley. The final section gives an in depth description of the program's Fortran 77 code. (Author)

Descriptors :   *Computer programs, *Fault tree analysis, User manuals, Computations, Computer files, FORTRAN, Output, Input, Failure, Rates, Probability, Replicas

Subject Categories : Statistics and Probability
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE