NDLI: Multi-version software reliability through fault-avoidance and fault-tolerance

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Multi-version software reliability through fault-avoidance and fault-tolerance

Content Provider	NASA Technical Reports Server (NTRS)
Author	McAllister, David F. Vouk, Mladen A.
Copyright Year	1989
Description	A number of experimental and theoretical issues associated with the practical use of multi-version software to provide run-time tolerance to software faults were investigated. A specialized tool was developed and evaluated for measuring testing coverage for a variety of metrics. The tool was used to collect information on the relationships between software faults and coverage provided by the testing process as measured by different metrics (including data flow metrics). Considerable correlation was found between coverage provided by some higher metrics and the elimination of faults in the code. Back-to-back testing was continued as an efficient mechanism for removal of un-correlated faults, and common-cause faults of variable span. Software reliability estimation methods was also continued based on non-random sampling, and the relationship between software reliability and code coverage provided through testing. New fault tolerance models were formulated. Simulation studies of the Acceptance Voting and Multi-stage Voting algorithms were finished and it was found that these two schemes for software fault tolerance are superior in many respects to some commonly used schemes. Particularly encouraging are the safety properties of the Acceptance testing scheme.
File Size	2067188
Page Count	44
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19900016268
Archival Resource Key	ark:/13960/t1fj7c72x
Language	English
Publisher Date	1989-09-01
Access Restriction	Open
Subject Keyword	Computer Programming And Software Fault Tolerance Correlation Algorithms Simulation Information Flow Estimating Sampling Reliability Run Time Computers Acceptability Computer Programs Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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