Fault Tree Analysis Programs
Fault Tree Analysis Programs
BRAVO (JBF Associates)
The program supports creation and analysis of fault trees. Estimates reliability
characteristics and importances for fault trees.
CAFTA for Windows (SAIC)
A comprehensive PC-based fault tree workstation with support for all phases
of systems analysis. Includes full screen editor, multilevel reliability
database, plotting, cut set generator, cut set results editor. Extensive
syntax and logic checking, logical editing, supports macros, calculates
unavailability from failure rate and exposure times, user definable fields,
truncates on cut set probability or size, allows user selectable gate transfers
& page breaks. Program also supports sensitivity studies.
Software tool for construction and analysis of fault trees. With its intuitive
graphical user interface, CARA-FaultTree lets you create fault trees in
a flash. A total of six system performance measures and six measures of
component importance is available, along with enhanced report utilities.
All in all, CARA-FaultTree is the product of choice for supporting fault
tree analysis.
CARE® FTA - Fault/Event Tree Analysis (http://www.bqr.com)
Handles Hardware/Software Fault and Event trees (no limit of functional
levels, number of assemblies, faults or events. The FTA tree can be built-up
from the project tree assemblies or components and/or from the functional
FMECA tree and\or from the RBD model tree. Different Gates options such
as OR, AND, NOT, XOR, K-out-of-N. FTA analyses common mode failures.
There is a really simple on screen presentation of the tree using + and
- to expand and collapse trees.
Only up and down scroll - no need to scroll right and left for large
trees.
Quick and accurate calculation of probability and rates for all events.
Conditional effects probability may be given under OR gates.
ETA-II (SAIC)
An event fault tree analysis program. Allows for multiple branches at event
tree nodes and multiple attributes to be assigned to each node. Expanded
event names, branch labels, expected value calculations, probabilistic
truncation, supports most plotters. Automatic location of event probabilities
from CAFTA or external tables and auto-scaling for plotter size.
Draws event tree diagrams and carries out cut set calculations and probabilistic
analysis.
FaultTree+ (Isograph Inc)
FaultTree+ provides CCF analysis, importance analysis, uncertainty and
sensitivity analysis facilities. The program allows users to construct
a single project database containing generic data and event tables, fault
trees with multiple TOP events, event trees originating from different
initiating events, CCF tables and consequence tables. Fault and event tree
pagination is automatically controlled by the program. Fault tree TOP events
may be used to represent specific nodes in the event tree. Multiple branches
are also handled to allow for partial failures. FaultTree+ uses efficient
minimal cut set generation algorithms to analyse large and complex fault
and event trees. NOT logic may be included in the fault and event trees
at any level and event success states retained in the analysis results
as an option.
Dramatic time savings over manual methods. Draws the tree automatically
from simple gate inputs using the keyboard, graphics display and a mouse.
Cut set analysis using Kinetic Tree method, sorted by order or probability.
Quantitative analysis and a confidence evaluation. Fault tree gates or
events can be linked to the event tree.
Fault Tree (Mitchell & Gothier)
Construction and analysis of fault tree, automatic fault tree generation,
library of standard symbols provided, modular tree construction, error
traps, qualitative and quantitative analysis. Easy to use mouse and menus,
handles large trees with hundreds of gates, cut set analysis, user controlled
plot scaling and placement, automatic positioning of symbols, hard copy
on demand, logical consistency checks and automatic checks for crossing
interconnecting lines.
FaultrEASE
FaultrEASE is an interactive graphics
editor for fault trees. It allows you to create, edit, and draw fault trees
with a mminimum of effort. It performs elementary fault tree mathematics,
including mixed probability and frequency calculations, and cut sets.
Formal-FTA is new product, initially for Sun Workstations. Being based
on advanced software techniques, it has no real restrictions, i.e it supports
an unlimited number of gates and events, events may appear in any number
of subtrees, subtrees may be nested to any level etc. The X/Motif graphical
user interface is highly intuitive, and supports advanced capabilities
such as moving branches from one location to another (with just a few mouse
clicks).
An events database is provided, which enables the description of events
to be independent of the tree. The events database may be shared between
fault trees. Minimal cut set generation is fast, and is based on an advanced
algebraic method. Both deterministic quantitative analysis and Monte Carlo
simulation are well supported.
Hosted on Unix systems, Formal-FTA is intended to meet the needs of
the most demanding studies, particularly where fault tree analysis is performed
as a group activity. The product may be run from Unix workstations or PCs
(by use of X Terminal emulation software).
FTRAN (Rex Thompson & Partners)
Graphical package to define and analyze fault trees. Package capable of
multi-state prime events. Performs Monte Carlo analyses of gate and top
event probabilities.
IMPORTANCE (Basic Event Cut Set Ranking) (National Energy Software Center)
A quantitative evaluation tool which calculates the importance of minimal
cut sets and basic events from minimal cut sets to a fault tree or reliability
network diagram by determining the probability of the top event. All measures
are calculated from statistical independence of basic events. System unavailability
and expected number of system failures are also computed.
Graphical Fault Tree construction, cut set generation and quantification.
Full screen editor for use when interfacing with remote computer systems.
Uses advanced graphical and analytical techniques to create, modify, reduce,
and analyze fault tree modes used in the analysis. Here is the brief
discription.
MFAULT (Fault Tree Analysis Cut Set Production) (National Energy Software
Center)
This tool identifies the cut sets of a fault tree and computes the probability
of occurrence. The input is the fault tree of an on-line or standby component
FOM with AND, OR, and INHIBIT gates and ON and OFF switches. The cut sets
may contain repairable items only, non-repairable items only, or a mixture
of both.
PREP/KITT (System Fault Tree Evaluation) (National Energy Software Center)
Determines minimal cut sets and the minimal path sets of the system fault
tree. The KITT programs calculate exact time-dependent reliability calculations
for each component and for the minimal cut and path sets. The reliability
information is calculated using upper bound approximation or by a bracketing
process where upper and lower bounds are obtained as close together as
desired. Non-repairable items and items with constant repair times can
be handled by the KITT programs.
Relex Fault Tree is a powerfula and user-friendly tool for performing fault
tree and event tree analyses. Included is support for gate types such as
AND, OR, Exclusive OR, NAND, NOR, Priority AND, Voting, and Inhibit gates.
The fast MCS calculations support common cause failures, as well as importance
and time-dependent analyses. Capabilities include a user friendly interface,
powerful CAD Import/ExportWizard, complete integration with the Relex Reliability
Prediction and Relex FMECA Software, visual report designer, spelling checker,
VBA macros, and much more. Relex is the industry leading software package
of its kind and incorporates MIL-HDBK-217, Bellcore, and Mechanical Reliability
Predictions, graphical Reliability Block Diagrams, FMEAs, FMECAs, Maintainability
Predictions, RCM and Life Cycle Cost analyses, and Fault Tree analyses
in one completely integrated tool.
Results II (Fault Tree Analysis) (Management Sciences)
Fault Tree Analysis package models from the top unwanted event downwards,
as a logic tree. The top gate represents the unwanted event and the roots
represent contributory events. Analysis of the tree is performed to identify
those events that must fail or operate to cause system failure or operation
(cut sets and minimal path sets).
RESULTS III (Management Sciences)
Complex risk analysis using logic trees (success or failure), Fault Tree
Analysis, Success Tree Analysis, Event Tree, Risk Quantification, Cut-sets,
Path-sets.
Risk Spectrum Fault Tree (Innovative Software Designs)
Fault tree analysis with interactive graphical fault tree editor, minimal
cut set analysis, calculation of top event unavailability, importance/sensitivity
analysis, time dependent analysis.
RKP606: Fault Tree Analysis (Innovative Timely Solutions)
The program provides the capability to create and analyze fault trees.
The program supports both qualitative and quantitative evaluation of fault
trees. Program features include minimum cutset path definition, graphic
representation of the tree, and probability of occurrence. GUI technology
is used to facilitate user inputs.
SAICUT (SAIC)
A fault tree evaluation program used to obtain minimal cut sets and for
estimating event probabilities. Features include: allows truncation on
cut set probability or size, fault tree size limited by memory, estimate
event probabilities. Finds cut sets for any event in a fault tree. Calculates
importance measures. Provides choice of top-down or bottom-up algorithms.
Identifies independent sub-trees, finds prime implicants for fault trees
containing negated events.
SAIPLOT (SAIC)
Used to plot fault trees generated by SAIC's (CAFTA). Features include:
handles up to 1000 gates & 1000 events, plots up to 250 pages, complete
editing to tailor fault trees to specific needs before printing. Handles
AND, OR, NOT, EQU, XOR, COM, NAND, NOR, AANB(ANOT), ANAB, OANB(ONOT), ONAB,
and INH type gates. Supports plotting large single-sheet fault trees. Plots
basic event, external event, undeveloped event, transfer, conditioning
event, and special transfer.
TRACE (Tree Analysis Code) (COSMIC)
This package analyzes fault trees to identify the most probable causes.
The primary and secondary component failures are the basic inputs while
the time to failure is a random variable exponentially distributed. The
minimal cut-sets and critical paths of fault trees are determined using
Monte Carlo simulation techniques. The probabilities of fault tree failures
are also determined in this fashion. The usual logic gates are permitted.
Tree Master (Management Sciences)
Success and Fault tree analysis. Risk Decision Analysis with 16 gate types.
Graphic input optional. Quantification by Monte Carlo techniques. Full
cutset/pathset and plotting options. Common cause, etc.
Tree-Master Software Family (Antonin Wild)
Family of programs for editing, evaluating, and plotting fault trees and
success trees. Simulation program evaluates failure rates and downtimes.
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