Accession Number : AD0769247

Title :   The Availability and Effectiveness of Modular Systems,


Personal Author(s) : Hill,J. S.

Report Date : JAN 1973

Pagination or Media Count : 9

Abstract : Most large computer systems can be regarded as being constructed from a numer of independent sub-units, each of which has a characteristic mean time between failures and mean time to repair. The report gives a method of calculating the probability that such a system is in a fully operational state, or in any one of the possible failure states, at any given instant. If it is possible to ascribe effectiveness to the system in its various failure states as well as to the fully operational state, this information can be combined with the results of the probability calculations to give a system effectiveness plot. Such plots can be used to compare the availability expected from different system designs. (Author)

Descriptors :   (*Computers, *Reliability), Systems analysis, Failure, Probability

Subject Categories : Computer Hardware
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE