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Reliability Software, Safety and Quality Solutions / Software / Basic Reliability Prediction

Basic Reliability Prediction Software

Basic Reliability Prediction (MTBF Calculation)
RAM Commander software prediction module is a reliability tool providing everything necessary for primary reliability prediction (MTBF or failure rate prediction/calculation) based on one of the prediction models for electronic and mechanical equipment.
It contains more than 30 reliability prediction methods, including the latest methods like FIDES  2009 and 217 Plus:

Electronic components reliability prediction methods:
  MIL-HDBK-217E-1 P. stress
  MIL-HDBK-217F-1 P. count
  MIL-HDBK-217F-1 P. stress
  MIL-HDBK-217F-2 P. count
  MIL-HDBK-217F-2 P. stress
  MIL-HDBK-217E-1 draft (Nonoperating)
  Reliability Toolkit (1995)
  HDBK 217Plus new!
  BELLCORE Issue 5, 6
  GJB/Z 299B P. count
  GJB/Z 299B P. stress
  GJB 299C P. stress/P. count new!
  CNET RDF93 rev. 02/95
  IEC 62380
  UTE C 80-810
  FIDES Guide 2004
  FIDES Guide 2009 new!
  Telcordia SR-332 Issue 1 
  Telcordia SR-332 Issue 2 new!
  Siemens SN 29500-1
  Siemens SN 29500-2005-1 new!
  Stress/Strength Analysis

Mechanical components reliability prediction methods:
  NSWC-98/LE1 Mechanics new!
  Stress/Strength Analysis

RAM Commander reliability module supports 'one-click' automatic switch between different prediction methods.
Each method defines a set of component parameters which should be defined in order to calculate its reliability:

FIDES reliability prediction

To make the management of these complex data more convenient and easy, different reliability libraries are available.

Components Library
RAM Commander contains built-in electronic components library. SoHaR supplies the library containing hundreds of thousands (total number of records is currently 410,000 and the number is growing) of widely used electronic components by the world leading manufacturers continually updated by RAM Commander team adding more manufacturer's data on a monthly basis.
Customers may update the library - both manually and by importing components data.

Part Number Recognition
Leading manufacturers use special algorithms naming their parts. RAM Commander implements these algorithms for the opposite direction in order to get reliability data from Part Number. Our reliability software supports algorithms for decoding Part Numbers of passive components (Resistors and Capacitors) of the following manufacturers:
AVX, ATC, Bourns, Cal-chip, DALE, Hitano, Garrett, IRC, Johanson, Kemet, KOA, Kyocera, Mallory, Meritek, Murata, MSI, NIC, Nichicon, Novacap, Samsung, Siemens, Syfer, OhmCraft, Paccom, Philips, Phycomp, Ralec, ROEDERST, TDK, TaiyoYuden, Vishay, Roedenstein, Vitramon, Yageo.

GPRD Library
Additional reliability data library available for users is GPRD (General Part Reliability Data) which is used to store manufacturers' provided or field reliability data (obtained from FRACAS or another source).

Use of described above reliability prediction methods, reliability libraries and convenient project tree building and management utilities makes RAM Commander reliability prediction module a must-have tool for reliability engineering.

As a result of reliability prediction performed is a report with a breakdown of MTBF figures per system, unit, board and component levels:

Assembly Composite Report

Obtained failure rates are then used in reliability and availability analysis using Temperature Curve, Mission Profile, Pareto and other tools - see Reliability & Availability Analysis Software Module.


Functional Packages:

  • 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


  • 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 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


  • 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


  • 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


  • 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

See also:
Reliability & Availability Analysis Module
RAM Commander product homepage 
Reliability prediction methods Overview
SoHaR Reliability&Safety Services Overview 
Download the latest version of RAM Commander V8.2 (November 2011)


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