In this issue: Issue 119, January 2011
*Hot Topics
*Reliability Basics
*Tool Tips
*Hot News
*Contribute to HotWire

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Hot Topics
Reliability Growth Planning
The objective of reliability growth testing is to increase a system’s reliability to a particular goal or requirement through the discovery of failure modes and the implementation of corrective actions. Often times the question that arises when setting up a reliability growth program is whether the reliability goal will be met in the allocated test time. Alternatively, one may need to know how many systems should be allocated for growth testing or how long should the growth test last in order to meet the goal. The Growth Planning tool in RGA 7 can be a very useful tool in answering those questions. In this article we present the Growth Planning tool and provide an example of an appropriate use.

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Reliability Basics
Predicting Warranty Returns in Weibull++ 7
Performing warranty return predictions can be a very useful analysis tool when trying to budget for warranty costs or to prepare for a required warranty pool. Usually when dealing with warranty data, one encounters data in the form of sales per time period (which can be in weeks, months, quarters, etc.) and subsequent returns per time period. Weibull++ 7 can be used to transform this type of data into traditional time-to-failure data so that a failure distribution can be fitted and then predictions can be performed. In this article we present an example of how Weibull++ 7 can be used to perform those predictions and also how to report the results of the analysis through the use of different plots.

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Tool Tips
  • How can I segregate my data in Weibull++?
  • What resources are available to help me learn to use ReliaSoft’s software tools?

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Hot News

ReliaSoft at RAMS 2011 - We will be on location in Florida at Disney’s Contemporary Resort from January 24 - 26, 2011 to participate in the 57th Annual Reliability & Maintainability Symposium. Our team of reliability experts is looking forward to presenting the following papers, tutorials and panel discussions:

Paper Presentations

"Design of Reliability Demonstration Testing for Repairable Systems"
By Huairui Guo, ReliaSoft Corporation, Haitao Liao, The University of Tennessee, Athanasios Gerokostopoulos, Adamantios Mettas, ReliaSoft Corporation.

"Special Topics for Consideration in a Design for Reliability Process"
By Georgios Sarakakis, Athanasios Gerokostopoulos, Adamantios Mettas, ReliaSoft Corporation.


"Reliability from Design Inception to Product Retirement"
By Duane Dietrich, ReliaSoft Corporation.

"Lessons Learned for Effective FMEA"
By Carl Carlson, ReliaSoft Corporation.

"Design of Experiments and Data Analysis"
By Huariui Guo and Adamantios Mettas, ReliaSoft Corporation.

Panel Discussions

"How to Effectively Implement Design for Reliability (DFR), and Design for Six Sigma (DFSS) in a Systems Engineering Environment"
Panel Member - Adamantios Mettas

"How to Determine Realistic Test Acceleration Factors"
Panel Member - Huariui Guo

We will also be on-hand to provide you with helpful information and to demonstrate the capabilities of our complete suite of software tools, including our web-based XFRACAS application, so be sure to stop by our booth for a brief visit! For additional information about RAMS, including the final program, please visit

* Early Registration Deadline for ARS, Europe - The International Applied Reliability Symposium, Europe will be held from March 23 - 25, 2011 in Amsterdam. You can save €100 if you sign up by January 31, 2011. Online registration is available through For more information, please visit the website, send an e-mail to or call (+48) 22 436 67 70. The complete program matrix is also available online at
* Call for Presenters - ARS, Asia Pacific - The committee is currently soliciting presenters for the 2011 ARS, Asia Pacific, which will be held in Singapore on October 19 - 21, 2011. The presentation proposal deadline is February 28, 2011. If you are interested in learning more about this opportunity and the potential to win an Excellent Presentation Award, please review the detailed instructions and milestones posted at
Upcoming Public Training Event Calendar
February 2011
February 2 - 4, 2011: RS 480 RCM Principles and Applications in New Delhi, India
February 7 - 11, 2011: MSMT Foundations in Berlin, Germany
February 21 - 25, 2011: MSMT Foundations in Tucson, Arizona
February 28 - March 2, 2011: RS 511 Application of Reliability Growth Models in Developmental Testing and Fielded Systems in Singapore
March 2011
March 2 - 4, 2011: RS 560 Fundamentals of Design for Reliability in Bangalore, India
March 14 - 18, 2011: Effective FMEA Series (RS 470 & RS 471) in Tucson, Arizona
March 15 - 17, 2011: RS 522 Advanced System Reliability / Maintainability Analysis in Tucson, Arizona
March 23 - 25, 2011: International Applied Reliability Symposium in Amsterdam, The Netherlands
March 28 - 30, 2011: RS 522 Advanced System Reliability / Maintainability Analysis in Amsterdam, The Netherlands
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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