
Accession Number : ADA317886
Title : Correlation in Multiversion Software.
Descriptive Note : Technical rept. JanSep 96,
Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF MATHEMATICS
Personal Author(s) : Jayachandran, Toke
PDF Url : ADA317886
Report Date : OCT 1996
Pagination or Media Count : 14
Abstract : It has been established both theoretically and experimentally that independently developed redundant software versions fail dependently. Several probability models that account for this phenomenon of concurrent failures have appeared in the literature. Tomek et al., proposed an intensity distribution that introduced a specific type of correlated failure pattern viz., pairwise correlation between software modules. They derived the intensity pef for N = 2 and 3 modules and indicated the desirability of an efficient algorithm to compute the pmf for larger values of N. This paper contains an easily programmable algorithm to generate the pef for any choice of N.
Descriptors : *COMPUTER PROGRAMS, MATHEMATICAL MODELS, ALGORITHMS, DISTRIBUTION, COMPUTER PROGRAMMING, PROBABILITY, INTENSITY, EFFICIENCY, CORRELATION, REDUNDANCY.
Subject Categories : Computer Programming and Software
Distribution Statement : APPROVED FOR PUBLIC RELEASE