In this issue:

Issue 68, October 2006

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

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Hot Topics

Dont Let Your Event/Maintenance Log Data Go to Waste
Companies are increasingly relying on information to run their businesses and stay competitive. More aggressive productivity goals and globalization needs are putting higher pressure on companies to increase the efficiency and availability of their assets. In this competitive environment, one companys downtime can become another company's opportunity. Obtaining relevant data about the failures and repairs of assets is central to achieving company goals.

One very valuable kind of data that is collected in the manufacturing, process, oil, machine tools and communication industries is the log of failures and repairs of physical assets such as machines, airplanes, computers, servers, trucks and oil refineries. This information can provide many insights about failure modes, outages, their frequencies, the repair duration, uptime/downtime and availability. It can aid in gaining knowledge required for critical business performance improvements.

The volume of this type of data can become very large and the task of extracting useful and concise information can also become cumbersome. This article highlights some of the functionalities of Weibull++ 7 that can be utilized to facilitate the processing of event or maintenance logs that your company might be keeping track of.

To read more, see 

Reliability Basics

How to Simplify Complex RBDs with a Commonly Used Distribution
System reliability analysis relies on deriving a system reliability equation (cumulative density function, cdf, and/or probability density function, pdf) from the Reliability Block Diagram (RBD) of a system. The derived equations can be used to calculate various reliability metrics. The pdf and cdf can easily become complex equations as the RBDs become more complex and the distributions of the blocks in the RBDs become more varied.

Often, reliability analysts need to approximate a system's RBD with a simple distribution. In this article, we explain an approach for simplifying RBDs with a simple representative common distribution using BlockSim 6 and Weibull++ 7.

To read more, see 

Tool Tips
  • How can item properties be assigned based on part number in Lambda Predict?

  • How can simulation results be repeated in RENO?

To read more, see 

Latest Software Updates
New service releases are now available for BlockSim (SR 6.5.4) and Weibull++ (SR 7.1.3). To determine the compile revision of the application on your computer, select About from the Help menu. More Software Downloads...


Application Date Created Version
BlockSim 10/5/06 6.5.4
BlockSim Update N/A SR 6.5.4
Weibull++ 7    
Weibull++ 7 10/3/06 7.1.3
Weibull++ 7 Update N/A SR 7.1.3
Hot News
* New Xfmea and RCM++ Features Coming - ReliaSoft will soon be releasing a new version of Xfmea and RCM++ that provides many enhancements and exciting new features. One of these key features will allow authorized users to activate a Change Log for a particular analysis, which records a version history and a log of every change to the original analysis. The software will also provide an integrated utility to support Design Review Based on Failure Mode (DRBFM) analysis, which is used in the automotive and other industries to evaluate proposed changes to an existing design. For more information on these and other new features that will be available in the Version 4 release, see
* ReliaSoft at ESREL 2006 - We would like to thank everyone who stopped by our booth at the 2006 European Safety and Reliability Association Conference (ESREL) last month. It was great seeing our old friends and making new ones. We look forward to hearing more from you over the course of the year!
* 2007 ARS Call for Presentations - The 2007 Applied Reliability Symposium in Chennai, India scheduled for April 19 - 20, 2007 is currently accepting presentation proposals that address the Symposium theme: "Sharing applications, success stories and lessons learned in reliability and maintainability engineering." The deadline for proposal submissions is November 1, 2006.  Subjects that will be covered in the 2007 Symposium include, but are not limited to:
  • Warranty reduction
  • Reliability as an investment, not a cost
  • Specifying reliability and reliability metrics
  • Supplier management
  • Data collection, management and analysis
  • Reliability and safety
  • Reliability and market share
  • Reliability testing
  • Software reliability
  • Manufacturing reliability

For more information, please visit the ARS Web site at or e-mail

* Worldwide Public Seminar Calendar for 2007 - ReliaSoft has announced the public seminar schedule for 2007. This includes an extensive array of reliability training courses, including the essential 5-day MSMT Foundations seminar, held at locations throughout the world. To find a seminar that meets your needs, consult the online calendar at Now is your opportunity to plan all of your 2007 training in advance before our classes fill up!
* New Class Added!  -ReliaSoft has recently added RS 490 Introduction to Standards Based Reliability Prediction and Lambda Predict to our course catalog. This two-day course introduces standards based reliability prediction analysis with hands-on training in the use of ReliaSoft's Lambda Predict software. The emphasis is on how to maximize the benefits of Lambda Predict and its wide range of capabilities. The course covers the three most commonly used Reliability prediction standards (MIL-HDBK-217, Bellcore and NSWC Mechanical) with brief coverage of RDF 2000 and China 299B. The first publicly scheduled event is coming up soon (November 30 - December 1, 2006)! For more information, please visit
Public Training Event Calendar
October 2006
October 18 - 20, 2006: RS 525 Probabilistic Event Analysis in Tucson, Arizona
October 23 - 27, 2006: MSMT Foundations in Frankfurt, Germany
November 2006
November 6 - 10, 2006: RS 540 Repairable Systems Analysis in Melbourne, Australia
November 13 - 17, 2006: MSMT Foundations in Melbourne, Australia
November 13 - 17, 2006: MSMT Foundations in Tucson, Arizona
November 27 - December 1, 2006: RS 540 Repairable Systems Analysis in Singapore
November 30 - December 1, 2006: RS 490 Intro to Standards Based Reliability Prediction and Lambda Predict in Tucson, Arizona
December 2006
December 6 - 8, 2006: RS 511 Adv. Reliability Growth Analysis in Tucson, Arizona
December 6 - 8, 2006: RS 521 Advanced QALT in Tucson, Arizona
December 11 - 12, 2006: RS 401(C) Life Data Analysis (Condensed) in Chennai, India
December 13 - 14, 2006: RS 522(C) Advanced System Analysis (Condensed) in Chennai, India
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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