Reliability HotWire: eMagazine for the Reliability Professional
In this issue:

Issue 31, September 2003

*Hot Topics
*Reliability Basics
*Tool Tips
*Latest Software Updates
*Hot News
*From the Edge
*Contribute to HotWire
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Hot Topics  

Using Maintenance Policies
In BlockSim 6, there are two methods for analyzing a reliability block diagram: analytically and via simulation. The analytical method is advantageous because you can obtain a closed-form reliability equation and duplicate the results. However, the analytical solution does not take into account any maintenance policies that you may have defined for the blocks in the diagram. One of the most important benefits of simulation is the ability to define how and when the actions are performed. In particular, the actions of interest are the part repairs and replacements. This can be accomplished in BlockSim 6 by defining maintenance policies. There are three different types of maintenance policies that can be defined for actions in BlockSim 6: corrective maintenance, preventive maintenance and inspection.

To read more, see 

Reliability Basics  

Overview of BlockSim Containers in Simulation

In BlockSim 6, the container was introduced to facilitate the analysis of standby redundancy and load sharing blocks. But how does the container accomplish this? This article presents how containers are used for standby and load sharing analysis during simulation.

To read more, see 

Tool Tips  
  • What database maintenance tools are available in Xfmea Standard?

  • How can I build a custom application using Weibull++ engines?

  • Where can I find an index of ReliaSoft's publications?

To read more, see 

Latest Software Updates

A new service release for BlockSim (SR 6.1.1) is now available. To determine the compile revision of the application on your computer, select About from the Help menu.


Application Date Created Version
BlockSim 8/29/03 6.1.1
BlockSim Update N/A SR 6.1.1
Hot News

BlockSim 6 FTI Edition was officially released on August 29th!!! - BlockSim 6, the ultimate system visualization tool, now expands the analysis capabilities with an optional Fault Tree Analysis interface that supports all of the traditional FTA gates and event symbols that are applicable to system reliability and related analyses. Pre-release orders have been filled. For more information, please visit our Web site at or contact the sales team.


ReliaSoft Announces the Gold Subscription License - This single-user subscription license includes full use of Weibull++ 6, Weibull++ MT, Weibull++ DE, BlockSim 6, BlockSim 6 FTI Edition, ALTA 6 PRO, Xfmea and RG. Printed copies of applicable documentation (Reference Guide, User's Guide, etc.) and attendance to one public seminar per year are also included. As new products and upgrades are released, active Gold Subscription members will automatically gain eligibility to receive these titles. The yearly subscription fee for this license is $6,195. This is an excellent option for those engineers who want to stay on the cutting edge of what ReliaSoft has to offer. For more details, please contact the ReliaSoft sales team.


License Rentals Now Available - ReliaSoft now rents licenses on a yearly basis at 50% off of the product list price (not including Weibull++ products and RG). This option is beneficial to those engineers with short term projects or limited budgets. For more details, please contact the ReliaSoft sales team.


Special News for the Navy and Marines - ReliaSoft's software (Weibull++ 6, ALTA 6 PRO and BlockSim 6) has been tested and approved for military use on the NMCI network. If you have been denied access to your existing ReliaSoft software or wish to purchase these packages, please contact our sales office for the appropriate RFS numbers.


2003 Canadian Reliability & Maintainability Symposium - ReliaSoft is a proud sponsor of this upcoming event scheduled for October 16 - 17, 2003. The Canadian Reliability and Maintainability Symposium provides a forum to share experiences with leading R&M professionals. For more information, see


1st Annual Applied Reliability Symposium (ARS) - ReliaSoft and the Reliability Analysis Center (RAC), along with ReliaSoft's corporate sponsors GE, Quantum and the US Army, are very excited to announce the 1st Annual Applied Reliability Symposium (ARS) scheduled for June 16 - 18, 2004 in San Diego, California. This symposium was first announced in the most recent edition of the Reliability Edge by ReliaSoft's VP of Corporate Relations, Doug Ogden. To review his comments, please visit the following link:

* Calendar of Public Events:


Advanced System Analysis and BlockSim Training Seminar - September 22 - 24, 2003 in Tucson, AZ. An intensive theoretical and hands-on course (utilizing BlockSim) which exposes the attendee to the advanced concepts, principles and requirements for performing detailed system reliability, maintainability, availability and related analyses. For a detailed course overview, see

FMEA/FMECA Analysis and Xfmea Training Seminar - September 25 - 26, 2003 in Tucson, AZ. This course offers an overview of FMEA/FMECA analysis procedures with emphasis on the use of the Xfmea software. For a detailed course overview, see


International Seminar at the Island of Cyprus: The Crossroads of Europe, Asia and Africa - Master the Subject, Master the Tools Training Seminar (MSMT) - Life data analysis, accelerated life data analysis and system analysis: October 6 - 10, 2003 in Larnaca, Cyprus. This seminar is in English. For more information, see

China - Master the Subject, Master the Tools Training Seminar (MSMT) - Life data analysis, accelerated life data analysis and system analysis: October 27 - 31, 2003 in Shanghai, China. This seminar is primarily in Chinese. For more information, see


Master the Subject, Master the Tools Training Seminar (MSMT) - Life data analysis, accelerated life data analysis and system analysis: November 17 - 21, 2003 in Tucson, AZ. For more information, see

From the Edge

In addition to the monthly Reliability HotWire, ReliaSoft also publishes the Reliability Edge, a printed journal that includes articles and information related to the field of reliability engineering. Articles of interest in the current issue include:

  • Reliability Growth Analysis and Plots - During the first phases of a product's development, the estimate of the product's final reliability is called the reliability goal. However, the first prototypes produced will almost certainly contain deficiencies that prevent the product from reaching that goal. In order to identify and correct these deficiencies, prototypes are usually subjected to a rigorous testing program and appropriate corrective actions are implemented to improve the design. This structured process is called reliability growth.

    ReliaSoft is currently working in cooperation with Dr. Larry Crow, the premier expert in the field of reliability growth, to develop the next generation of reliability growth analysis software, RGA 6. This article presents a brief overview of the capabilities of RGA 6 (scheduled for release in November 2003). See

Contribute to HotWire

Contributions Welcomed
As always, your feedback and contributions are appreciated. ReliaSoft is able to provide the most user-friendly reliability software packages and support because we listen to our customers. This applies to our newsletters and publications as well. We welcome any suggestions or contributions you may have for Reliability HotWire. If you have a topic or article that you think would be useful to the readers of Reliability HotWire, feel free to contact us.


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