ASENT Advanced Specialty Engineering Networked Toolkit

The ASENT toolkit provides leading-edge reliability and maintainability computer-aided engineering solutions.

The ASENT toolkit provides you the competitive edge for winning new business and increasing profitability through increased productivity.

ASENT is a comprehensive, intuitive, interconnected and graphic set of tools for reliability, maintainability, and testability analysis. ASENT’s graphics, always a communication enabler, have been further expanded so now you can fully document the design that was analyzed, including the schematic, assembly drawing, photos, and even video! You can even define your own fields to hold additional information, and store supporting design documents or other documentation (Word/PDF/Excel) in the ASENT database!

The most recent version of ASENT contains many new capabilities throughout the entire tool suite, but particular attention was given to make reliability and maintainability predictions even easier to perform. ASENT 2014’s enhanced editing capabilities and import features make bringing in your BOM and refining your prediction data a breeze. A new failure rate prediction method, based on MIL-HDBK-217G, Draft 4 has been added to the long list of prediction methods currently supported by ASENT. All of these prediction methods come standard, along with a suite of tools specifically designed to help you easily manage COTS items.

ASENT is coupled with Microsoft’s® SQL Server® to deliver more database horsepower than other R&M tools on the market. The client/server architecture was specifically designed to handle reams of program data, and allow multiple users concurrent access to the same project data. Analyses can be performed in parallel, even when teammates are geographically dispersed, and designers can retrieve information immediately after it is entered. ASENT eliminates the hassle of transferring files and combining data and ensures you are always working with the current design. In addition to offering extensive report formats and a user-defined reporting capability, ASENT’s open architecture allows you to quickly create customised reports.

ASENT works with Microsoft ® SQL Server ® WindowsNT ® and Windows 98 to provide a familiar graphical user interface, and will export reports in a variety of formats, including Microsoft Word ® Microsoft Excel ® and HTML. For added flexibility, ASENT has an open architecture and uses standard formats, which enable users to easily access data with external tools for generating custom applications or reports.

RAM Commander

See also Ram Commander for an alternative R & M Tool

ASENT 2014 is now available, and has the ability to be web-accessible when configured on a Citrix server. It is compatible with Microsoft SQL Server 2008, Microsoft Vista, Windows 7 and the latest version of Microsoft Office.

ASENT 2014 Released

ASENT’s intuitive approach uses the controls and displays that you have become familiar with through your use of the Windows® Explorer. Drag-and-drop, pop-up menus and mouse-over hints have been further extended to a new ASENT FRACAS tool that provides the same approach to the Failure Reporting and Corrective Action System (FRACAS) discipline. The FRACAS tool can be used either standalone or integrated with the ASENT installation, where it is automatically linked through the Session Manager. No other R&M toolkit delivers this much versatility and ease of use.


The ASENT LSAR data interface provides you the ability to populate your LSAR in minutes, not days or weeks of data entry! The LSAR Interface also provides the only bidirectional interface capability available today allowing you to recreate the FMECA, Reliability Prediction and MTTR analysis from a LSAR data file.

ASENT SELF Paced Training!

Asent Modular Toolkit

ASENT modular toolkit structure allows you to select only the modules that best meet your requirement. These include the Board Analysis Manager which leverages the pioneering work in physics of failure-based analysis. For added value, we also offer combination packages and volume discount. The modules include:

What’s New in ASENT 2014?
ASENT R&M Toolkit

Version 2014 of the ASENT R&M Toolkit was just released. ASENT is an integral part of our family of world-class products, and we continually strive to make it better with each release. Input from training classes, customers, and work done on Six Sigma productivity projects, have all contributed to the latest version of ASENT.

This page will briefly describe some of the new features included in the ASENT 2014 release. With each release there are many minor enhancements that help fine tune the help files, layout of menus, user interfaces, and other aspects of the toolkit. Here, we will focus on a few of the more notable changes.

FMECA Manager

The FMECA toolkit has been the focus of a wide number of enhancements. New features make it much easier to perform Testability Analysis, and report the results. The Failure Mode Criticality Matrix has been expanded to include an additional page that lists criticality values for each failure mode and a summary of their values. The Logan FTA interface is much more robust, and now allows users to leverage ASENT’s FMECA data to create multiple, complex Fault Trees in a single operation. A new set of reports have been added to allow users to document their Reliability Centered Maintenance (RCM) Analysis. These reports offer a full suite of options and allow you to specify which assemblies are included in the report by assembly type

Reliability Manager

The Mission Profiler has been expanded to allow you to include both Operational and Non-operational mission phases in a single profile. A menu item has been added to the subassembly menu, allowing users to import part lists for subassemblies in addition to boards. It has always been easy to import trees or sub-trees from existing ASENT projects, but now you have the ability to import trees or sub-trees from an Excel file. You can either add to the existing product tree or replace portions of the tree with this new feature.

A new Reliability Tree Report has been added to complement the existing failure rate prediction reports. It provides a highly tailorable Excel output with much more available information. Users have always had a great deal of flexibility when it comes to thermal data. Data can either be directly entered, or associated with an existing part list by using an Excel file, or calculated by performing a thermal analysis within ASENT. In addition, the user can now quickly approximate junction temperature rises based on power dissipation and junction-to-case thermal resistance. This new feature provides a quick solution for situations where thermal analysis data is not available.

Component Data Manager

Currently, users can bulk load part library data from Excel files for a variety of part types. In ASENT 2014 we have expanded this capability to allow you to import miscellaneous parts and inductors.

LSAR Interface Tool

ASENT continues to provide the most robust capability for interfacing to LSAR tools. While many tools advertise some ability to pass LSAR data, only ASENT provides a full-featured import/export capability that is quick and easy to use. Many new features have been added in this release. The focus of these enhancements has been to continue to make the interface more robust to handle wide variations in data, and to provide users with greater options and flexibility in controlling the flow of data either into or out of ASENT.

Relex Translator

This tool makes it very easy for customers to transition from Relex to ASENT. Legacy data files can be quickly translated to create new ASENT projects. New options allow you to build a consolidated library of parts created through the translation of many legacy projects


ASENT supports collaboration through an extensive set of interfaces to software toolkits for other disciplines. Examples include the SLATE ®and DOORS ®systems engineering tools, interfaces to all major CAD packages, and the EAGLE ® SLIC ®and OMEGA ®logistics tools. ASENT’s interfaces provide automated data flow between tools to improve communication and productivity in a highly dynamic design environment. This enables analyses to be performed in parallel, significantly reducing design cycle time.


With ASENT, the emphasis is on data sharing across tools to provide a significant productivity lift. It interfaces with LOGAN Fault & Event Tree Analysis Tool, RAC’s PRISM ®and RAPTOR tools for reliability analysis. ASENT also interfaces with Giordano’s Diagnostician, enabling automated database population to significantly reduce the need for user-entered data. ASENT’s reporting and interface capabilities make the results from these tools readily available to other engineering disciplines. A product tree can be imported from an existing LSAR and easily passed to PRISM to perform a reliability prediction. These results are then available in ASENT’s FMECA and Maintainability tools.

In addition, ASENT works with Raytheon’s EAGLE and AIMSS software products to provide a suite of tools that perform product supportability analysis and documentation throughout a product’s lifespan.



Information Reuse

While other tools support data reuse by allowing the user to copy an existing project file, quickly finding the right file can often be a problem, especially when the data owner is not available: in a meeting, on vacation or a business trip, etc. ASENT, in its network configuration, solves that problem. ASENT can leverage a company’s network to quickly connect with other ASENT servers anywhere in the world. Once connected, wildcard searches can easily be performed in parallel across all projects on a server – a decided advantage over the “hit or miss” serial searches provided by other tools. The customer can download the data of interest and incorporate it into a project or product.

Asent Connectivity

Through its extensive set of interfaces to other tools, ASENT allows access to legacy data from separate databases, such as LSARs, to rapidly build the basis for Reliability, FMECA, Maintainability and Testability analyses and manage the data within ASENT as shared data. Unlike other tools, ASENT does not burden the network, allowing Microsoft’s ®powerful SQL Server ®engine to perform all the data intensive manipulation on the server, returning only the results.

It is estimated that up to 70% of the analysis effort is devoted to data acquisition and re entering data into analysis tools. ASENT’s wide range of interfaces coupled with its ability to provide an enterprise solution significantly reduces the effort required to perform these tasks.

Reliability Manager (Failure Rate Predictions and Reliability Block Diagrams)

ASENT’s Reliability Manager – the cornerstone of the entire toolkit – contains some key usability features: a powerful product tree editor, the ability to import almost any file format, quick access to part data, prediction tools for both operating and non-operating failure rates, sensitivity analysis, a mission profiler, comprehensive reporting features, and a powerful replicate function. This replicate feature alone can save an enormous amount of time when updating designs with many common modules.

Key Features
  • Web Accessible via Citrix

  • Reliability Predictions, Modeling

  • Integrated FMECA Analysis

  • Integrated Maintainability Analysis

  • Integrated RCM Analysis

  • Integrated Testability Analysis

  • Integrated Thermal Analysis

  • Integrated Derating Analysis

  • Import/Export LSAR Data

  • User Defined Fields

  • Store Source Documents & Graphics with your Analysis

  • Extensive interfaces to Design tools, System tools and other Analysis tools

ASENT includes many of the most popular prediction methods used for calculating both operating and non-operating failure rates. Other companies charge extra for these methods, but they are all standard with ASENT.

When performing calculations, failure rate status flags are clearly displayed next to each item in your product tree structure. When failure rates have been calculated, these flags alert the user to any potential problems.


rm 1


  • Build product tree structures
  • Import board data part lists
  • Edit part lists
  • Import subtree from existing analysis
  • Perform Mil-Hdbk-217, F, FN1, FN2, Bellcore Issue 6, or mixed failure rate
  • calculations
  • Replicate function
  • Invoke Board Manager

Generate reports including:

  • Derating problem
  • Op tree failure rate
  • Failure rate survey
  • Stress ratio/junction temp
  • Stress analysis worksheet
  • User-defined
  • RBD Analysis
  • Failure rate was calculated successfully

  • Failure rate was calculation includes one or more user set values

  • The failure rate calculator used default values

  • A problem prevented the failure rate calculation

  • Failure rates have not been calculated

prism computer

ASENT’s bi-directional interface to the SRC’s PRISM tool provides several advantages:

  • ASENT’s product tree structure and powerful editing capabilities, along with its extensive part library, are readily available to PRISM.
  • ASENT’s comprehensive reporting capabilities can be used in addition to the reporting found in PRISM.
  • By using RAC’s tool to calculate failure rates, users are assured that the latest models associated with the PRISM prediction method are used.
  • These failure rates are readily available to ASENT users for follow-on analyses, such as FMECA or maintainability predictions.
  • PRISM is invoked from ASENT by simply selecting a menu option.

A similar interface is currently planned for RIAC’s new 217Plus tool.

Reliability Block Diagram (RBD) Analysis

ASENT’s RBD Analysis tool allows you to model a system, using either the Mission Reliability approach or the Reliability with Repair approach to determine system reliability, either in terms of probability of mission success or in terms of Mean Time Between Critical Failure (MTBCF) and Mean Time To Restore Functionality (MTTRF).

You can perform sensitivity studies as functions of time, discrete events (firings, launches, etc.), system architecture, item reliability or item maintainability. The tool supports elements modeled in series, parallel, series-parallel combinations, and complex active or standby redundancies. Tradeoffs can be quickly performed to identify a system’s critical functions and reliability choke points as well as determining logistic factors, such as Available Preventive Maintenance Time, System Availability, Logistics (Serial) Reliability.

Key Features
  • Integrated with Reliability Prediction.

  • Supports Mission Reliability and Reliability with Repair.

  • Graphical, real time presentation.

  • Quickly handles large systems and large arrays (e.g. 180:200)

  • Excel report output with imbedded block diagrams.

  • Calculates Availability, Mean Down Time, Max Time to Repair

  • Automated export to Raptor tool.

  • Comprehensive reporting

  • Associate graphics and drawings

As the Reliability Product Tree is updated, the RBD Analysis is automatically updated and is easily visible from the product tree! A suite of utilities is provided to maximize your productivity including a completeness checker, a utility to initially populate, or quickly change the data of all the RBD blocks. The Reliability Modeling Worksheet provides a convenient means to quickly tailor or update your model.

The RBD Analysis Report presents your analysis, with block diagrams and supporting tables in Excel format. Armed with this information, you have an early opportunity to improve your system design.

asent rebd
FMECA Manager ( FMECA, RCM, and Testability Analysis )

ASENT offers the most robust FMECA capability on the market today. With true relational integrity between causes, failure modes, and next effects, you can be assured of the accuracy of your analysis results. You can specify multiple next effects and end effects for each failure mode. The built-in library of part types, along with failure modes and failure mode distributions, greatly reduces the time involved during piece-part level FMECA.

ASENT’s FMECA tools support functional, hardware, or combined FMECAs. With the unique ability to specify a function and then link the function to a group of board parts, ASENT allows you to effectively model depot-level isolation and repair activities.

ASENT lets you perform top-down or bottom-up FMECAs, and gives you the flexibility to enter data as it becomes available rather than in a forced order. Assemblies, parts, and signals can be modeled along with the related failure modes and effects. The relationship between failure modes, effects, and the tree structure are tracked automatically so that updates are easy to make at any time. After the updates have been completed, failure mode ratios and criticality numbers can be recalculated and new reports generated with the simple tap of a key.

Often, the tree structure used in performing a FMECA differs from the hardware tree used for a reliability prediction. Because of this, ASENT provides full tree editing capability in the FMECA Manager. The reliability tree can be used to whatever extent desired, but you have the flexibility to deviate from it when needed.

Since the FMECA process can be a considerable documentation effort, ASENT’s powerful Completeness Checker helps to assess your FMECA status at a moment’s notice and identify any missing data – another great time saver!

Key Features
  • Intuitive graphical display

  • Mil-Std-1629A FMEA/FMECA

  • Extensive failure mode libraries

  • Criticality analysis

  • Integrated testability analysis

  • Integrated RCM analysis

  • User defined fields

  • Comprehensive reporting

  • Powerful completeness checker

  • Associate graphics and drawings

Product Tree Editor

  • Mil-Std-1629A FMEA/FMECA
  • Library Manager
  • Part/Signal List Editor
  • Failure Mode/Effects Editor
  • Roll Up Failure Mode Ratios
  • Calculate Criticality
  • Completeness Checker
  • Testability Data Editor
  • Calculate FD/FI
  • RCM Analysis
asent fmeca
RCM Analysis

ASENT’s Reliability Centered Maintenance (RCM) tool is fully integrated into the FMECA, giving you a head start in your analysis, as much of the critical data is already defined. This integrated approach also simplifies future updates and maintenance for subsequent deliveries, as changes in the product structure, failure rates, failure modes, effects and criticalities automatically flow into the RCM analysis!

You can conduct analysis using the methodologies of Mil-Std-2173, and UK MoD MSG-3, or NAVAIR 00-25-403. The questionnaire logic is fully automated for these methods and includes a full task analysis suite to allow you to define the types of RCM tasks for each failure mode. The task analysis suite provides you with extensive capabilities to add explanatory notes to any and all tasks as well as full control over the order of the presentation of the tasks.

Often, the RCM results for one failure mode will be applicable to others. ASENT provides you a capability to quickly copy the RCM results, and RCM tasks, to one or more failure modes.

A full set of report formats are provided for each RCM method, in Excel format, for easy inclusion into customer deliverables. The RCM results are also part of the LSAR export, providing extensive documentation in the BG table of the RCM analysis.

Key Features
  • Integrated in the FMECA Analysis

  • Implements Mil-Std-2173

  • Implements UK MoD MSG-3

  • Implements NAVAIR 00-25-403

  • Extensive Task Analysis

  • Complete Set of Reports in Excel Format

  • Automated results copy

  • Automated export to the LSAR

RCM Questions
RCM main
Testability Analysis

The testability tab of the FMECA Manager allows you to make use of the FMECA product tree structure and data, and provides a means to enter fault detection/isolation and false alarm rate information for failure modes. You can easily build the isolation list from a dropdown list of items that are applicable for each ambiguity group, and order them by failure rate or other criteria. Normally, this information is entered only at the lowest level of the product tree structure, and all intermediate values are calculated by ASENT.

ASENT’s powerful Library Editor allows you to define detection/ isolation groups (IBIT, PBIT, visual, test points, etc.) and populate the test code library. Test codes can be organised into categories (hardware, software, etc.) for easy reference, and default false alarm rates can be specified for each test code. ASENT will quickly calculate fault detection/ fault isolation percentages, and false alarm rates for each group. You can easily see how test coverage stacks up in comparison to your design or customer requirements.


The above screen shows where Test Points J1-62/J1-20 on the SRA are used to detect a LOSS OF 5 VOLTS A AND B failure, isolating the failure cause to components C0003 and F0001.

testability 2

This screen shows how you might set up detection/isolation groups. Here, various flavors of BIT are listed along with a VISUAL group and test points for both WRAs and SRAs.

Also you can define Isolation Group Sizes. For example, group 6 represents test points on the SRA. This example shows groups that isolate to 4 or fewer components, 8 or fewer components, or 10 or fewer components. Below shows a Test Coverage Summary report. You can turn on or off a wide variety of options when generating testability reports, so that only information that interests you is output.

testability 3

ASENT’s testability completeness checker will identify any missing or incomplete data. This saves time and effort, and provides extra assurance that the results are accurate and complete. You will appreciate the wide range of available reports. Whether you need a quick summary of test coverage for a certain group, or a detailed report that slices the data a certain way, ASENT has it covered. ASENT allows you to copy testability data from one failure mode to one or more failure modes with only a few mouse clicks. This can save considerable time when performing analysis on areas of your design with similar detection/isolation criteria. Alternate tests can be defined in order to perform trade studies.

testability 4

ASENT’s Testability Analysis capability is an integral part of its R&M tool suite. The product tree structure and failure rates are readily available, along with FMEA/FMECA data. Whether it is your Testability Group or your Maintainability Group that is interested in analyzing your design’s test coverage, they will enjoy the benefits of ASENT’s integrated solution. Its client/server architecture supplies additional benefits by providing concurrent access to project data for a wide range of engineering disciplines. This reduces cycle time by allowing many of the analyses to be performed in parallel.

asent testability
asent testability
Maintainability Manager

The ASENT Maintainability toolkit has been optimized to reduce data entry and maximize the use of existing reliability data to help you efficiently manage the maintainability analysis process. All necessary tools are included to assist in your analysis. The product tree structure and reliability prediction data is readily available in ASENT’s Maintainability toolkit, but you can quickly and easily add covers or other hardware often excluded from reliability predictions.

Both Corrective and Preventive Maintenance analyses are supported. ASENT calculates maintenance times (both mean and maximum, e.g., MTTR and MMaxCT) and outputs the result in both minutes and hours.

Organizational, intermediate, and depot levels of repair are fully supported for procedures II and V of MIL-HDBK-472. The tool’s powerful “what-if” mode instantly models the impact of various design and maintenance tradeoffs in real time.

ASENT’s built-in task libraries (MIL-HDBK-472 and RADC-TR-84-165) greatly reduce the time spent entering data. Also, since replacement tasks are often the same as remove tasks, only listed in reverse order, ASENT allows you to enter these with a single click of the mouse.


The tasks are then automatically entered and the appropriate task times are pulled from ASENT’s built-in task time libraries. When you combine this information with customisable Task Libraries, and the ability to enter Judgments as difficulty factors for working in hard-to-reach or adverse conditions, you get a powerful combination of maintenance planning tools.

Inherent, achieved, and operational availability are calculated as part of the analysis and are prominently displayed, along with other analysis results on the prediction results screen. With ASENT, the analysis results are consolidated on one easy-to-read page, so the affect on your system can be quickly determined.

The Maintainability tool comes with an extensive suite of reports. ASENT’s comprehensive reporting allows you to quickly slice the data, so that you can view just the information you want. The convenient Excel format makes it particularly easy to incorporate outputs into customer deliverables.

Prediction results at a glance, built-in task time libraries and images, a familiar spreadsheet interface, the flexibility to add judgments and difficulty factors, and extensive modeling capabilities all help put ASENT’s Maintainability Toolkit into a class by itself.

Key Features
  • Powerful tree editor

  • Built-in task time libraries

  • Manages task groups and tools

  • Judgments/difficulty factors

  • MIL-HDBK-472 calculations (procedures II and V)

  • Availability calculations

  • Corrective and preventive maintenance

  • Comprehensive reporting

  • Maintenance “what-if” planning

The tool calculates availability, mean time to repair, maximum corrective maintenance time, and includes a powerful What-if? mode that instantly models the impact of various design and maintenance tradeoffs in real time.

  • Maintainability Product Tree Editor
  • Built-In Task Time Libraries (Mil-Hdbk-472, RADC-TR-84-165)
  • Maintainability Library Editor
  • Mil-Hdbk-472 MTTR calculations (Procedures II and V)
  • Maintenance what-if planning
  • Availability calculations
  • Comprehensive reporting
  • Corrective and Preventive
Board Manager – Thermal Analysis

ASENT’s Thermal Analysis tool leverages pioneering work in the physics of failure based analysis. This tool can help you proactively affect your board design by performing trade studies based on component placement, power dissipation, packaging, mounting technology, board composition, and cooling design. Five different cooling methods are available.

You can quickly identify or validate thermal-related problems, and identify and quantify potential solutions. The graphical analysis display lets you see the results, graphically showing vital information such as failure rate, stress, power consumption, and temperature (i.e., case, junction, layer, and substrate).

A powerful editing feature comes standard with this tool, which allows you to quickly change the board outline, composition, or component placement. When defining the board composition, you can create special regions of material or cutouts on board layers. Fully definable plated-thru holes, vias, and fin structures may also be added to assist with selected cooling methods.

  • Board Outline Manager
  • Board Composition Manager
  • Part Placement Editor
  • PWB Thermal Analysis
  • PWB Display

Thermal results are used by the reliability prediction when calculating failure rates, thereby improving the accuracy of the prediction model.

Please contact us for further information on any of our products and services or if you simply wish to find out how ASENT can help your organisation. You may also wish to receive a copy of The ASENT Instant Expert CD. The CD will show you WHY there is no competition for ASENT and demonstrates WHY no other tools match or even gets close to the POWER OF ASENT.

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
  • Customisable 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 customisation