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Reliability Software, Safety and Quality Solutions / Software / Failure Analysis Software / Fault Tree (FTA)

Fault Tree Analysis (FTA) Software

Download the latest version of RAM Commander V8.2 (November 2011)


RAM Commander's FTA (Fault Tree Analysis) software module is the one of the unique features of the RAM Commander. It is simplified FTAnalyzer, fully integrated with RAM Commander product tree, reliability prediction and FMECA. It implements and summarizes the first-hand experience gained by the ALD FTA experts in hundreds of projects using RAM Commander and other ALD software tools.

Fault Tree Analysis Software
Main window of the RAM Commander Fault Tree Analysis Module

Fault Tree Analysis Module Features

  • Up-to-date, intuitive and powerful fault tree diagram interface allowing full control over the diagram: elements location, colors, styles, zooms, etc.
  • Handy methods for diagram printing and simple Copy & Paste transfer to other applications
  • Easy to use Events Library
  • Generation of Minimal Cut Sets
  • Calculation of Unavailability Q(t), Mean Unavailability Q
  • Calculation of Importance and Sensitivity
  • Calculation of Frequency W(t) and Intensity L(t)
  • Calculation of Unreliability F(t) and Number of Failures E(0,t)
  • Set of required reports - FTA diagram, MCS, events library etc.
  • Link between FTA and the product tree
  • Link between FTA and FMECA modules
  • Integration with Safety analysis module
  • Automatically build FTA from FMECA
  • Automatically build FTA from FMEA
  • Data import from RiskSpectrum, Aralia SimTree and CAFTA

    Fault Tree Analysis is one of the most widely used methods in system reliability and failure probability analysis. A fault tree is a graphical representation of a logical structure representing undesired events ("failures") and their causes. You create the logical structure by using gates and represent undesired events by using basic events. Reliability parameters are assigned to the basic events. Widely used in system reliability studies, fault tree analysis offers the ability to focus on an event of importance, such as a highly critical safety issue, and work to minimize its occurrence or consequence. The probability of the top-level event can then be determined by using mathematical techniques. The resulting fault tree diagram is a graphical representation of the chain of events in your system or process, built using events and logical gate configurations.

    FTA Basic Event Information
    FTA Basic Event data

    Two types of analysis can be conducted using Fault Tree Analysis Software:
  • Qualitative Analysis: performed by means of Minimal Cut Sets (MCS) building
  • Quantitative Analysis: calculating the Absolute probabilities, i.e. the probabilities of system failures

    MCS Report
    Example of FTA Unavailability and MCS Analysis report

    After Unavailability calculation and MCS analysis, Importance and Sensitivity Analysis may be performed. Importance analysis results help to select those fault tree events, which contribute most to the system's unavailability. Sensitivity analysis helps to choose those events, where a relatively small change will lead to a relatively large system unavailability changes. Calculated values are Fussell-Vesely importance (FV Imp), Risk Decrease Factor (RDF), Fractional Contribution (FC), Risk Increase Factor (RIF) and Sensitivity Value for each Basic or Undeveloped Event.

    Importance/Sensitivity Analysis
    Example of FTA Importance and Sensitivity Analysis report

    Fault Tree Analysis is acknowledged as a key tool for increasing safety. It is unique and indispensable in analyzing risks and determining various combinations of hardware, software, and human error failures that result in a specified risk or system failure. Fault tree analysis is useful both in designing new products/services and in dealing with identified problems in existing products/services. In the quality planning process, the analysis can be used to optimize process features and goals and to design for critical factors and human error. As part of process improvement, it can be used to help identify root causes of trouble and to design remedies and countermeasures.

    FTA is used by other RAM Commander modules - the Safety Assessment Software Module (compatible with aviation safety requirements, SAE ARP4761 and other standards) and MMEL (Master Minimum Equipment List analysis for aviation industry).
     


Functional Packages:
PREDICTOR

  • 5 Standard Operating Reliability Prediction Methods
  • BOM Builder, Temperature Curves, Mission Profile, and Import Wizard
  • Full set of ready-to-print Reliability Reports
  • Enhanced Report Generator for user defined reports

RELIABILITY PRO

  • 5 Standard Operating Reliability Prediction Methods
  • BOM Builder, Temperature Curves, Mission Profile, and  Import Wizard
  • User Defined Components Reliability Data Module
  • Full set of ready-to-print Reliability Reports
  • Enhanced Report Generator for user defined reports
  • Components Library Module (over 400k components)
  • RBD - Reliability Block Diagram

MAINTAINABILITY PRO

  • Maintainability Module (according to MIL-STD-472 Procedure 5A)
  • Built in libraries for Tasks, Times, STE, Skills, and Materials
  • Maintenance Engineering Report (MEA Report)
  • Maintenance Task Analysis Report
  • Full set of ready-to-print Reliability Reports
  • ILS Supprt Fields (user defined)
  • BOM Builder, Temperature Curves, Mission Profile & Import Wizard
  • Enhanced Report Generator for user defined reports
  • RCM/MSG-3 Module
  • FMECA Module

FAILURE ANALYSIS & ISOLATION

  • BOM Builder, and Import Wizard
  • FMECA (covering both Hardware & Functional) Module
  • Customizable FMECA Worksheet
  • FTA Module
  • FMECA Import/Export
  • Testability Module
  • Full set of FMECA & FTA ready-to-print Reports
  • Full set of ready-to-print Testability Reports including graphical trouble shooting, fault isolation, etc.
  • FMD-97 Library
  • Enhanced Report Generator for user defined reports

SAFETY ASSESSMENT

  • SSA supporting IEC 61508 (Safety Standard for Safety Instrumented Systems) and MIL-STD-882D (SHA, O&SHA), SAE, ARP 4754A, and ARP4761
  • Customizable FMECA Worksheet
  • FTA Module
  • RBD Module
  • Markov Chains Module
  • FMECA Import/Export
  • Full set of ready-to-print Safety Reports
  • Enhanced Report Generator for user defined reports

AVIATION SAFETY

  • SSA & FHA according to SAE, ARP 4754A, ARP4761, and FAR 25 1309b
  • FTA including ready-to print reports
  • MSG-3 (System, Zonal, and Structural) including ready-to-print reports
  • MMEL including ready-to-print 5-column report
  • FMECA including ready-to-print FMECA reports, BOM Builder, and Import Wizard
  • Enhanced Report Generator for user defined reports
  • Report Template Utility for layout customization

Download the latest version of RAM Commander V8.2 (November 2011)

See also:
Fault Tree Analysis Services
RAM Commander homepage
Safety module
Event Tree Analysis module
SoHaR Services and Safety
SoHaR Reliability and Safety Software Overview
Reliability&Safety Software Download

 
 
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