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The Weibull module analyzes incoming historical data to provide the prediction distributions required by the RCMCost and AvSim modules.
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The LCC module will allow you to create a cost node structure and integrate predicted maintenance and operational costs with other user-defined cost equations. The Avsim module will enable you to analyze the availability and reliability of both complex and simple systems and optimize spares holdings, design configurations, opportunistic maintenance policies and much more. For example, the RCMCost and Weibull modules provide the data management, reporting and analytical facilities for developing and maintaining a RCM programme. AWB integrates the functionality of Isograph’s RCMCost and AvSim products that have been serving the Reliability and Maintenance Community since 1988.ĪWB contains six fully integrated modules: RCMCost Module (Reliability-Centered Maintenance) AvSim Module (System Availability Simulation) Life Cycle Cost Module (LCC Module) Weibull Module Process Reliability Module SAP Portal Module Each module may be licensed separately depending on the user's needs.
Reliability workbench fault tree batch full#
Availability Workbench provides a fully integrated environment for: ĭeveloping and maintaining a Reliability-Centered Maintenance (RCM) program Performing full system availability predictions taking into account complex dependencies on spares and other resources Performing a Life Cycle Cost Analysis Process Reliability AnalysisĪWB interfaces seamlessly with external databases and applications through its sophisticated import/export facility and dynamic link library. Note that for large values of n and intermediate values of k it is possible to create a configuration that appears simple but is actually extremely mathematically complex.Availability Workbench Functional SummaryĪvailability Workbench Functional Summary Welcome to the Availability Workbench (AWB) simulation program for Microsoft Windows. Note: Complexity of k-out-of-n configurations In other words, the fault tree considers k-out-of- n failures for the system failure while the RBD considers k-out-of- n successes for system success. In this configuration, the system will not fail if three out of four components are operating, but will fail if more than one fails.
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If the output event is system failure and the two input events are component failures, then this fault tree indicates that the failure of A or B causes the system to fail. In this diagram, the two events are connected to an OR gate.
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The following figure shows a simple fault tree diagram in which either A or B must occur in order for the output event to occur. Alternatively, if both input events must occur in order for the output event to occur, then they are connected by an AND gate. If the occurrence of either input event causes the output event to occur, then these input events are connected using an OR gate. To illustrate the use of these gates, consider two events (called "input events") that can lead to another event (called the "output event"). The AND and OR gates are the two most commonly used gates in a fault tree. The pathways interconnect contributory events and conditions using standard logic symbols (AND, OR, etc.).įault tree diagrams consist of gates and events connected with lines. A fault tree diagram follows a top-down structure and represents a graphical model of the pathways within a system that can lead to a foreseeable, undesirable loss event (or a failure). It was later adopted and extensively applied by the Boeing Company. Air Force for use with the Minuteman system. This chapter presents a brief introduction to fault tree analysis concepts and illustrates the similarities between fault tree diagrams and reliability block diagrams.īell Telephone Laboratories developed the concept of fault tree analysis in 1962 for the U.S. Although the symbols and structures of the two diagram types differ, most of the logical constructs in a fault tree diagram (FTD) can also be modeled with a reliability block diagram (RBD). Principles, methods and concepts discussed in previous chapters are used.įault trees and reliability block diagrams are both symbolic analytical logic techniques that can be applied to analyze system reliability and related characteristics. This chapter introduces basic fault tree analysis and points out the similarities (and differences) between RBDs and fault tree diagrams. BlockSim allows system modeling using both reliability block diagrams (RBDs) and fault trees.