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Reliability Software, Safety and Quality Solutions / Software / Reliability Modeling (RBD)

Reliability Modeling (RBD)

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


RBD - Reliability Block Diagram with Monte-Carlo simulation

RBD module allows performing the functional Reliability and Availability analysis of systems with variety of reliability distributions, and types of redundancy and repair factors. While the basic RAM Commander module provides the reliability calculations and predictions for non-redundant systems, RBD utilizes data defined in other modules (reliability, maintainability, FMECA), and performs either analytical calculation or Monte Carlo simulation depending on the type of a reliability configuration of the system.

RBD-supported configurations
? Series
? Parallel
? K-out-of-N with active (hot) redundancy
? K-out-of-N with stand-by (cold) redundancy
? Partially loaded K-out-of-N - warm redundancy
? K-out-of-N w/repair, w/o repair, w/restricted repair
? K-out-of-N with Switch
? Sub-RBD, K-out-of-N for Sub-RBD

The analytical technique is used mostly for exponential distributions. For each RBD, a graph of the reliability function R(t) can be drawn and MTBCF (Mean Time Between Critical Failures) can be calculated using numeric integration.

Monte Carlo simulation with its' high speed, accuracy, and large number of steps allows to evaluate Reliability and Availability for arbitrary configurations when there is no analytical solution, i.e. complex configurations, including standby, partially loaded and active redundancy; full or restricted repair with non-exponential distribution of time-to-repair; analysis under non-steady, transient state; dependent RBD elements; analysis of periodical inspection policy.

Distributions
? Exponential
? Normal
? Log-Normal
? Weibull
? Erlang
? Uniform

Reliability Block Diagram Software
MTBCF (Mean Time Between Critical Failures) Calculation
Reliability Block Diagram and MTBCF graph

System Configuration feature of the RBD module is an ingenious answer to the requests of our customers who need to compare the reliability and availability of various system configurations created as the sub-sets of the project product tree. The creation of the unlimited number of system configurations, easy transformation of each configuration into an RBD, MTBCF calculation, synchronized with the product tree changes, and finally a clear and elegant graphical presentation - all this makes the System Configuration feature an invaluable addition to the RAM Commander performance.

RAM Commander System Configurations Module
System Configuration Table

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

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

See also:
RAM Commander homepage
SoHaR Reliability and Safety Software Overview
Reliability&Safety Software Download
See SoHaR Reliability, Safety and Quality Services if you wish us to perform reliability prediction, analysis or other activities for you

 
 

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