The use of triple-modular redundancy to improve computer reliability

  • Authors:
  • R. E. Lyons;W. Vanderkulk

  • Affiliations:
  • -;-

  • Venue:
  • IBM Journal of Research and Development
  • Year:
  • 1962

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Abstract

One of the proposed techniques for meeting the severe reliability requirements inherent in certain future computer applications is described. This technique involves the use of triple-modular redundancy, which is essentially the use of the two-out-of-three votingc oncept at a low level. Effects of imperfect voting circuitry and of various interconnections logical elements are assessed. A hypothetical triple-modular redundant computer is subjected to a Monte Carlo program on the IBM 704, which simulates component failures. Reliability is thereby determined and compared with reliability obtained by analytical calculations based on simplifying assumptions.