Availability Workbench. Availability Workbench (AWB) is the latest in a line of Isograph products to serve the Reliability and Maintenance community. The Overview of the Prediction Module page contains a description of the features available in Reliability Workbench for building a Telcordia SR-332 model. NSWC-98 Handbook NSWC Standard 98/LE1 (Handbook of Reliability Prediction Procedures for Mechanical Equipment) is the US Naval Surface Warfare Center standard for the reliability prediction. The toolchain IAR Embedded Workbench, which supports more than 30 different processor families, is a complete IDE with everything needed; compiler, analysis tools, debugger, functional safety and security in one single view - ensuring quality, reliability and efficiency in your embedded application.
FaultTree+ Fault Tree Analysis
Reliability Workbench is Isograph’s flagship suite of reliability, safety and maintainability software. The software has been in continuous development since the 1980s. It is easy to use and is a great tool for all reliability and maintenance professionals. Reliability Workbench allows you to develop projects using one or more of the.
The FaultTree+ module in Reliability Workbench is the latest version of the world leading FaultTree+ software package. Isograph has built its reputation on the efficiency, accuracy, stability and ruggedness of its FaultTree+ product.
The FaultTree+ module provides an easy to use interface for constructing fault tree diagrams. Gates, events and failure models can be added with just a few clicks.
Fault tree diagrams represent hierarchies of sub-system and component failures and how they could cause system failures. The TOP event of a fault tree represents a system event of interest and is connected by a series of gates to component failures.
Failure and repair data is assigned to the system components. The Fault Tree module will perform a detailed analysis to calculate reliability and availability parameters for the system and identify critical components.
IEC 61508 Failure Models
The Fault Tree module now includes IEC 61508 failure models. If you are using the new IEC 61508 failure models, Reliability Workbench will automatically determine HFT (hardware fault tolerance) requirements where appropriate.
IEC 61508 also includes Dormant Modeling features. The averaging algorithms for multiple dormant failures in a cut set are now performed for up to 4 dormant failures in a cut set.
Event Tree Module
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The Event Tree module is able to handle large problems and to fully handle success logic. An event tree model may be created independently of the fault tree model or may use fault tree analysis gate results as the source of event tree probabilities.
The event tree module handles both primary and secondary event trees, multiple branches and multiple consequence categories. Isograph customers have created and analysed event trees with over 30,000 branches.
Markov Analysis Module
The Markov module allows users to easily build state transition diagrams and performs numerical integration to solve complex problems. State transition diagrams represent the discrete states of the system and the possible transitions between those states.
The Markov module models multiple phases representing continuous or discrete transitions. The module also analyses non-homogeneous processes by allowing time dependent transition rates to be defined. The phases allow the system lifetime to be split into periods representing (for example) preventative maintenance or standby.
The models created in the Markov analysis module may be linked to basic events in the fault tree and event tree analysis modules.
Availability Workbench
Availability Workbench is our flagship suite of availability simulation software. It includes the latest versions of Isograph's AvSim+ and RCMCost software for system availability simulation and reliability centered maintenance. In addition it includes Weibull Analysis and Life Cycle Costing modules.
Availability Workbench is used to optimize maintenance and spares policies, predict system availability and throughput and estimate life cycle costs. It includes well-known modeling methods such as FMECA, Reliability Block Diagram Analysis, and Fault Tree Analysis.
Reliability Workbench incorporating FaultTree+
An integrated visual environment in which failure rate and maintainability prediction, FMECA, Reliability Allocation, Reliability Block Diagram, Fault Tree, Event Tree and Markov analysis are combined.
Failure rate predictions are calculated from the Telecordia, MIL-HDBK-217, 217 Plus and IEC TR 62380 standards for electronic equipment and the NSWC-98/LE1 Handbook for mechanical parts.
FMECA, Reliability Block Diagram and Fault Tree analysis are performed to well-known standards such as MIL-STD 1629 and IEC 61508.
Hazop+
One of the commonly used techniques in the preliminary phase of a safety study is a hazard and operability study. Hazop+ provides a familiar visual environment in which to design and use the study and action forms that are the basis for entering Hazop information. Extensive reporting facilities are available.
Network Availability Prediction
Network Availability Prediction enables users to predict the availability and reliability of communication networks. The network availability model utilizes an extended Reliability Block Diagram (RBD) methodology that addresses the specific characteristics of network elements and their connections. In addition to predicting network availability Network Availability Prediction also provides criticality rankings that identify weak spots in the network. Network Availability Prediction provides many time-saving features to allow users to quickly construct the network diagram. These include a parts library facility that allows users to import their parts data in convenient groupings, a network element library facility that allows users to construct common network element diagrams and a fully interactive network diagram construction facility.
AttackTree+
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Attack trees allow threats against system security to be modeled concisely in an easy to understand graphical format. The effectiveness of internet security, network security, banking system security, installation and personnel security may all be modeled using attack trees. With the increased risk of terrorist attacks on homeland security, hacking attacks on computer systems and computer-based fraud on banking systems, AttackTree+ is an invaluable tool to system designers and security personnel. AttackTree+ provides a method to model the threats against a system in a graphical easy-to-understand manner.