|Reliability Workbench™ - RBD Module|
What is a Reliability Block Diagram?
A Reliability Block Diagram is a method of modeling how components and sub-system failures combine to cause system failure. Reliability block diagrams may be analyzed to predict the availability of a system and determined the critical components from a reliability viewpoint.
The screen shot below shows a RBD model of a simplified computer system:
RBDs and Minimal Cut Sets
The RBD Module of Reliability Workbench is capable of analyzing large and complex RBDs producing the full minimal cut set representation for systems and sub-systems.
Markov analysis capabilities are provided for analyzing components with strong dependencies.
RBDs and Importance Measures
The RBD Module calculates a range of importance measures as well as providing standard system and sub-system parameters such as unavailability, unreliability and expected failures.
The program allows users to construct a single project database containing failure model data and block diagrams representing one or more systems. Large block diagrams may be split into sub-systems (there is no limit to the number of hierarchical levels that may be specified for a project). Navigation between sub-systems is easily achieved using the Change Page or Find facilities provided by the program.
Common Cause Failures
The RBD Module also includes a special Beta Factor Common Cause Failure (CCF) facility that allows users to associate groups of blocks with the same CCF model.
During the analysis special CCF events are automatically generated by the program allowing the accurate evaluation of the effects of common cause failures.
System Performance and Other Features
The RBD Module automatically evaluates the system minimal cut sets and uses the cut sets to determine system performance parameters. The program produces high quality reliability block diagram reports. Automatic pagination allows the user to quickly construct and print large RBDs.
A powerful Report Generator facility allows customized reports and graphs to be produced. Import and export facilities allow data to be transferred to and from databases, spreadsheets and files.
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