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ReliaSoft's Reliability HotWire: Issue 120

In this issue: Issue 120, February 2011
*Hot Topics
*Reliability Basics
*Tool Tips
*Latest Software Updates
*Hot News
*Contribute to HotWire

Reliability HotWire is a service of ReliaSoft Corporation

To subscribe or update your e-mail preferences, go to http://www.weibull.com/hotwire/index.htm
Hot Topics
Building a Composite Function in the Weibull++ Function Wizard
The Function Wizard in Weibull++ allows you to use both math functions, which are functions such as cosines or logarithms commonly found in spreadsheet software packages, and data source functions, which are functions such as reliability or failure rate that are based on data contained in a Weibull++ data sheet. In addition, the Function Wizard allows you to build composite functions by combining any number of math and/or data source functions into a single equation. This article will provide an example of building a composite function using the Weibull++ Function Wizard.

To read more, see http://www.weibull.com/hotwire/issue120/hottopics120.htm 

Reliability Basics
Relating Distribution Parameters to Real-World Applications
For managers and engineers who are new to reliability, it can be difficult to relate the parameters of a statistical distribution to their real-life reliability requirements. Consider, for example, the fact that the eta parameter of the Weibull distribution is the time by which about 63.2% of the units in a population are expected to fail. In practice, this value may not be particularly useful. When looking at warranties, for instance, the maximum percentage of units that can fail during a warranty period is often 10% or less. For this reason, it can be easier to understand and explain reliability concepts in terms of metrics other than those that statisticians typically use. This article presents an example of constructing a contour plot for the Weibull distribution using the beta parameter and the time at which 10% of the units in the population are expected to fail (i.e., the B10 life).

To read more, see http://www.weibull.com/hotwire/issue120/relbasics120.htm 

Tool Tips
  • When I use the "Save Log of Simulations" feature in BlockSim 7 and calculate the average of all the individual results, why isn’t that value identical to the results from a single set of simulations using the standard approach?
  • Can I configure Xfmea 5/RCM++ 5 to give a particular user access to some projects but not others?

To read more, see http://www.weibull.com/hotwire/issue120/tooltips120.htm 

Latest Software Updates
A new service release is now available for RGA (SR 7.5.3). To determine the compile revision of the application on your computer, choose Help > About. More Software Downloads...
Application Date Created Version
RGA 7 1/27/11 7.5.3
Hot News
* RAMS 2011 - Thanks to all of you who visited our booth at RAMS this year! As in previous years, interest in Weibull++ and Xfmea has remained strong; we also noticed an increased interest in RGA for reliability growth analysis. We were especially honored this year at RAMS when Pantelis Vassiliou, ReliaSoft's President & CEO, was presented with a plaque for the IEST Reliability Test & Evaluation Award "for his vision and outstanding contributions to the reliability and test communities in driving the development of a reliability analysis tool set that comprehensively integrates the reliability sciences with accelerated test technology."  For more information on the Institute of Environmental Sciences and Technology (IEST), please visit http://www.iest.org.
* 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. If you are interested in learning more about this opportunity (including the chance to win an Excellent Presentation Award), please review the detailed instructions and milestones posted at http://www.ARSymposium.org/asia/presenters/index.htm. Presentation proposals are due by February 28, 2011.
Upcoming Public Training Event Calendar
February 2011
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
April 2011
April 5 - 7, 2011: RS 511 Application of Reliability Growth Models in Developmental Testing and Fielded Systems in Bordeaux, France
April 5 - 7, 2011: RS 480 RCM Principles and Applications in Jacksonville, Florida
April 11 - 15, 2011: MSMT Foundations in Tucson, Arizona
April 25 - 27, 2011: RS 401(C) and RS 402 Life Data Analysis (Condensed) and Intro to Accelerated Testing in Penang, Malaysia
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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