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An experiment in software reliabilityThe results of a software reliability experiment conducted in a controlled laboratory setting are reported. The experiment was undertaken to gather data on software failures and is one in a series of experiments being pursued by the Fault Tolerant Systems Branch of NASA Langley Research Center to find a means of credibly performing reliability evaluations of flight control software. The experiment tests a small sample of implementations of radar tracking software having ultra-reliability requirements and uses n-version programming for error detection, and repetitive run modeling for failure and fault rate estimation. The experiment results agree with those of Nagel and Skrivan in that the program error rates suggest an approximate log-linear pattern and the individual faults occurred with significantly different error rates. Additional analysis of the experimental data raises new questions concerning the phenomenon of interacting faults. This phenomenon may provide one explanation for software reliability decay.
Document ID
19860020075
Document Type
Contractor Report (CR)
Authors
Dunham, J. R. (Research Triangle Inst. Research Triangle Park, NC, United States)
Pierce, J. L. (Research Triangle Inst. Research Triangle Park, NC, United States)
Date Acquired
September 5, 2013
Publication Date
May 1, 1986
Subject Category
COMPUTER PROGRAMMING AND SOFTWARE
Report/Patent Number
REPT-412U-2094-14
NASA-CR-172553
REPT-412U-2094-12
NAS 1.26:172553
Funding Number(s)
CONTRACT_GRANT: NAS1-16489
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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