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D. Tang, M. Hecht, J. Miller, J. Handal, "MEADEP - A Dependability Evaluation
Tool for Engineers", IEEE Transactions on Reliability
MEADEP
is a user-friendly dependability evaluation tool for measurement-based analysis
of critical systems. MEADEP
consists of four software modules: a data preprocessor for converting data in
various formats to the MEADEP
format, a data analyzer for graphical data presentation and parameter estimation,
a graphical modeling interface for building block diagrams (including the exponential
block, Weibull block, and k-out-of-n block) and Markov reward chains, and a model
solution module for availability/reliability calculations with graphical parametric
analysis. Use of the tool on failure data from measurements provides quantitative
evaluations of dependability for the target system, while greatly reducing requirements
for specialized skills in data analysis and system modeling from the user.
MEADEP has been applied to evaluate availability
for two air traffic control systems based on operational failure data and the produced
results have provided valuable feedback to the project management of these critical
systems. MEADEP has also been used to analyze a nuclear power plant safety model,
based on the Eagle 21 architecture and its early field failure data. The study identified
the most sensitive parameter and its most sensitive value segment to the plant mean
time between hazards.
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