In this issue: Issue 116, October 2010
*Hot Topics
*Reliability Basics
*Tool Tips
*Latest Software Updates
*Hot News
*Contribute to HotWire

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Hot Topics
Miner’s Rule and Cumulative Damage Models
Miner’s rule is one of the most widely used cumulative damage models for failures caused by fatigue. It is called "Miner’s rule" because it was popularized by M. A. Miner in 1945. In this article, we will explain what it is and how it is related to other more advanced cumulative damage models in ALTA.

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Reliability Basics
Chi-Squared Distribution and Reliability Demonstration Test Design
The Chi-Squared distribution has been widely used in quality and reliability engineering. For instance, it is well-known for testing the goodness-of-fit. In Weibull++, the Chi-Squared distribution is also used for reliability demonstration test design when the failure rate behavior of the product follows an exponential distribution. In this article, we will discuss this feature.

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Tool Tips
  • How can I change the data type for a Standard Folio in RGA 7?
  • How can I evaluate the accelerated life test design recommended by ALTA’s test planning utility?

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Latest Software Updates
New service releases are now available for RGA (SR 7.5.2), Xfmea (SR 5.0.2) and RCM++ (SR 5.0.2). To determine the compile revision of the application on your computer, select About from the Help menu. More Software Downloads...
Application Date Created Version
RGA 7 9/21/10 7.5.2
Xfmea 5 9/14/10 5.0.2
RCM++ 5 9/14/10 5.0.2
Hot News

Call for Presenters - Opportunity awaits engineers who would like to use their creativity, expertise and real-world experience to garner a coveted presentation slot at the 2011 International Applied Reliability Symposium, North America. The Symposium will be held from June 7 - 9, 2011 in San Diego, California and the presentation proposal deadline is December 3, 2010. Complete details, including the required proposal form, are available for your review at If your proposal is selected, you will gain not only the prestige of being an ARS presenter, but also complimentary registration to the event, a shirt with the ARS logo and a shot at winning one of the Excellent Presentation Awards!


Presenting at SMRP - ReliaSoft's Adamantios Mettas will be presenting at the Society for Maintenance and Reliability Professionals (SMRP) 18th Annual Conference in Milwaukee, Wisconsin. The title of his presentation is Asset Management Supported by Reliability Engineering. He will be in Track 1 from 11:15 am - 12:15 pm, Tuesday, October 19th. More details about this maintenance and reliability conference can be found online at:

Upcoming Public Training Event Calendar
October 2010
October 20 - 22, 2010: International Applied Reliability Symposium in Singapore
October 25 - 29, 2010: MSMT Foundations in Tucson, Arizona
November 2010
November 8 - 10, 2010: RS 480 RCM Principles and Applications in Jakarta, Indonesia
November 10 - 12, 2010: RS 560 Fundamentals of Design for Reliability in Melbourne, Australia
November 15 - 19, 2010: MSMT Foundations in Bordeaux, France
November 17 - 18, 2010: RS 490 Standards Based Reliability Prediction in Tucson, Arizona
November 17 - 18, 2010: RS 475 FRACAS Principles and Applications in Tucson, Arizona
November 22 - 24, 2010: RS 401(C) and RS 402 Life Data Analysis (Condensed) and Intro to Accelerated Testing in Chennai, India
December 2010
December 1 - 3, 2010: RS 560 Fundamentals of Design for Reliability in Amsterdam, The Netherlands
December 7 - 9, 2010: RS 521 Advanced Accelerated Life Testing Analysis in Tucson, Arizona
December 7 - 9, 2010: RS 511 Application of Reliability Growth Models in Developmental Testing and Fielded Systems in Tucson, Arizona
December 13 - 17, 2010: RS 540 Reliability and Maintainability Analysis for Repairable Systems in Bangalore, India
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