In this issue: Issue 105, November 2009
*Hot Topics
*Reliability Basics
*Tool Tips
*Latest Software Updates
*Hot News
*Contribute to HotWire

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Hot Topics
Operational Mission Profile Testing in RGA 7
During a development program, it is common practice for systems to be subjected to operational testing in order to evaluate the performance of the system under conditions that represent actual use. It is also common for reliability fixes to be implemented in conjunction with this testing and to perform reliability growth analysis on the data obtained. However, when the system must be tested for a variety of different mission profiles, it can be a challenge to make sure that the testing is applied in a balanced manner that will yield data suitable for reliability growth analysis. In this article, we show how reliability teams can use RGA 7's new Mission Profile Folios to incorporate operational mission profiles as part of their planning.

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Reliability Basics
Residual Plots in Accelerated Life Testing Data Analysis
In linear regression, it is assumed that the residuals are normally distributed with mean of 0 and have a constant standard deviation. In DOE++, ReliaSoft’s Design of Experiments (DOE) software, different residual plots are available for validating these assumptions. In accelerated life data analysis, residual plots also play an important role in identifying the right life-stress relationship and the right lifetime distribution. In addition to validating a model, residual plots also can help users to identify outliers. In this article, we discuss several residual plots in ALTA, ReliaSoft’s accelerated life data analysis software package.

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Tool Tips
  • Is there a quick way to edit the properties defined in Blocks, Policy Resources and Templates in a BlockSim project?
  • What is the difference between cumulative and non-cumulative data input in RGA 7?

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Latest Software Updates
A new service release is now available for RGA (SR 7.0.2). 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 11/02/09 7.0.2
Hot News
* Call for Presentations! - This is your chance to inspire others in your field by delivering a compelling presentation at the 2010 International Applied Reliability Symposium, North America. This event will be held from June 15 - 18, 2010 in Reno, Nevada. You have until December 4, 2009 to submit your proposal to the ARS committee.  If your presentation is selected, you will receive a complimentary registration to the event and an ARS logo shirt. You'll also have a chance to win one of the Excellent Presentation Awards! Complete details, including the required proposal form, are available for your review at Hurrythere's only a little time left; don't wait until the last minute!
* Year-end Seminars - As the end of the year approaches, you still have an opportunity to take advantage of top-notch training available from ReliaSoft. Whether you're located in India, Turkey, France or the United States, you are sure to find a course that can help to propel you and your company forward during 2010. Available course selections include:
  • MSMT Reliability Foundations Series (France)
  • Standards Based Reliability Prediction (Turkey and USA)
  • Reliability and Maintainability Analysis for Repairable Systems (India)
  • FRACAS Principles and Applications (USA)
  • Application of Reliability Growth Models in Developmental Testing and Fielded Systems (USA)
  • Advanced Accelerated Life Testing Analysis (USA)
To learn more about these course offerings, click on the appropriate links provided below, or visit our complete Event Calendar at
Upcoming Public Training Event Calendar
November 2009
November 16 - 20, 2009: MSMT Foundations in Bordeaux, France
November 17 - 18, 2009: RS 475 FRACAS Principles and Applications in Tucson, Arizona
November 19 - 20, 2009: RS 490 Standards Based Reliability Prediction in Tucson, Arizona
December 2009
December 2 - 4, 2009: RS 511 Application of Reliability Growth Models in Developmental Testing and Fielded Systems in Tucson, Arizona
December 2 - 4, 2009: RS 521 Advanced Accelerated Life Testing Analysis in Tucson, Arizona
December 8 - 9, 2009: RS 490 Standards Based Reliability Prediction in Ankara, Turkey
December 14 - 18, 2009: RS 540 Reliability and Maintainability Analysis for Repairable Systems in Chennai, India
January 2010
January 6 - 8, 2010: RS 588 DOE: Experiment Design and Analysis in Hyderabad, India
Contribute to HotWire
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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. We can be reached by e-mail at, or by standard mail at 1450 S. Eastside Loop, Tucson, AZ 85710-6703, USA.
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