Markov Modeling Programs
CARE III (Computer Aided Reliability Estimation) (COSMIC)
Models highly reliable, non-repairable systems complex, redundant, fault
tolerable systems). Accepts fault trees, non-homogeneous Markov chains,
and semi-Markov chains as input. Provides numerical values or graphical
plots on reliability coverage data. Cannot model repairable behavior. These
programs are written in FORTRAN IV.
The CARE® RBD module is the ultimate tool for the project management
and system engineering personnel for reliability Allocation and reliability
Calculation. The RBD tool provides six basic model types that provide engineering
personnel with capability to model the functionality of ANY complex system
(electronic, mechanical and software).
The Markov model uses states and transitions (State Transition Diagram)
of corresponding sub blocks.
The entire Markov block fails only if a predefined failure state, in
the State Transition Diagram, is reached as a result of random failures
in the sub-blocks.
The software provides the following results: MTBF\FPMH, Reliability,
Availability, Down Time (Hrs), MTTR (Min).
CARMS (Computer-Aided Rate Modeling and Simulation) (DAINA)
This program is an interactive Markov, Semi-Markov, and nonlinear Markov
analysis with adaptive Runge-Kutta and backwards-difference solutions modeling
tool designed for reliability, availability, and maintainability analysis
of redundant systems. Models are constructed through a graphical state
diagram, transition matrix, or expert system and all simulation results
are displayed graphically. The program comes complete with a 250 page book
called "Markov Modeling for Reliability Analysis".
CARSA (Computer Aided Redundant System Reliability Analysis) (COSMIC)
This program facilitates the reliability assessment for fault tolerant
reconfigurable systems. CARSA utilizes Markov modeling for failure effect
coverage. CARSA bypasses disadvantages of Markov modeling (the large number
of states required to model a system with many internal consolidation nodes)
by partitioning the system so that the Markov model is a lower dimension.
MARKOV1 (Decision Systems Associates)
General purpose software to build and solve Markov models.
MKV (Isograph Inc)
Some reliability problems can be solved effectively using the Markov
analysis technique. This method analyses state transition diagrams. Steady
state or time dependent transition rates are allowed. The time dimension
can be divided into phases that could represent different operating modes
such as maintenance tasks or varying loads.
PC Availability (Markov) (Management Sciences)
Modeling system availability using block diagrams and Markov analysis.
Provides a method for studying the influence of alternative failure rates
and repair rates, and logistics support on system availability. Outputs
include steady state or point in time calculations, double precision calculations,
output data extraction and report generation. Allows modeling of dependent
failure rates and repair times, sensitivity analysis of component failure
rates and repair times.
RAP (Reliability and Availability Program) (COSMIC)
Provides reliability, availability, and maintainability analyses for naval
shipboard use. Models probabilistic behavior of a set of equipment as a
continuous time, homogeneous, discrete state Markov Process. The statistical
probability of the system being in a macro state during a mission is computed.
These statistics are translated into a measure of system reliability and
availability for each mission phase.
SURE (Semi-Markov Unreliability Range Evaluator) (COSMIC)
An analysis tool for reconfigurable, fault tolerant systems. This program
calculates accurate upper and lower limits for the death-states for a large
class of semi-Markov models within a specified mission time.
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