Accession Number : ADA317886

Title :   Correlation in Multiversion Software.

Descriptive Note : Technical rept. Jan-Sep 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