Reliability HotWire: eMagazine for the Reliability Professional
In this issue:

Issue 56, October 2005

*Hot Topics
*Reliability Basics
*Tool Tips
*Hot News
*Contribute to HotWire

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Hot Topics

Using Weibull++ 7 and Monte Carlo Simulation for Probabilistic Design

Probabilistic design is a methodology aimed at producing robust and reliable products. A common mistake made by design engineers is not considering variations in the factors that affect the reliability or performance of their product and instead using only the nominal or mean values of these factors. By understanding the probability distributions of the design parameters, environmental usage profile and manufacturing variations, the design engineer can design for a specific reliability or quality level by producing designs that are robust to variations.

To read more, see 

Reliability Basics

Overview of the Gumbel, Logistic, Loglogistic and Gamma Distributions

The new version of Weibull++, version 7, introduces four more life distributions in addition to the Weibull-Bayesian distribution discussed in the previous issue of HotWire. These are the Gumbel, logistic, loglogistic and Gamma distributions. In this article, we present an overview of the new distributions and discuss some of their characteristics and applications.

To read more, see 

Tool Tips
  • What is new about Weibull++ 7's MDI and how can it be used to add and manage project items?

  • How can Weibull++ 7 be used to perform failure and repair analysis based on event logs?

  • Where can Weibull++ 7 examples and case studies be found?

To read more, see 

Latest Software Updates
Weibull++ 7 (7.0.2) has officially been released. In addition, new service releases are now available for Lambda Predict (SR 1.0.2) and RENO (1.0.3). To determine the compile revision of the application on your computer, select About from the Help menu. More Software Downloads...


Application Date Created Version
Weibull++ 7    
Weibull++ 7 10/17/05 7.0.2
Weibull++ 7 Update N/A 7.0.2
Lambda Predict    
Lambda Predict 10/3/05 1.0.2
Lambda Predict Update N/A SR 1.0.2
RENO 10/17/05 1.0.3
RENO Update N/A SR 1.0.3
Hot News
* Weibull++ Version 7 Released - Today's most advanced version of Weibull++, ReliaSoft's premiere reliability and life data analysis package, has now been officially released! This version has all of the features and usability you have come to expect from ReliaSoft products along with a host of great new features, including an enhanced interface that allows you to manage multiple analysis folios and related information all together in a single file, new Reliability Block Diagram (RBD) features, enhanced warranty analysis capabilities, support for Bayesian statistics, additional lifetime distributions, risk analysis and probabilistic design capabilities, an enhanced spreadsheet-based customized report utility and a whole lot more! For additional details on the updated version of Weibull++ 7, see Free evaluations are available at:
* International Applied Reliability Symposium, Orlando 2006 - Please mark your calendars and begin thinking about attending the 2006 International Applied Reliability Symposium next June in Orlando, FL. General information is available at The symposium has been booked for the Sheraton World Resort, which is walking distance from Sea World and 5 minutes away from Walt Disney World and Universal Studios. Registrations are currently being accepted at

Presentations are still being received; however, the deadline for presentation proposal submissions is October 31, 2005. Presentations will be accepted on the basis of the proposal. Because of the applied nature of the Symposium, presenters are asked to submit materials in presentation format only (i.e. PowerPoint - see Template at An accompanying paper is not required. 60 minutes have been allocated for each presentation with 10 minutes of questions for a total of 1 hour and 10 minutes per session. Presenters receive complimentary registration for the event.

* 2006 Training Schedule Posted - ReliaSoft has officially posted next year's training schedule for those of you who need to begin planning your continuing education. Classes range from foundational training on up to some very challenging yet fun advanced course work. Next year's handy training matrix is posted at
* 2006 Asia Pacific ARS Call for Presentations  - The 2006 Asia Pacific Applied Reliability Symposium will be held in Kuala Lumpur, Malaysia on September 13-14, 2006. Presentation proposals are being accepted for the theme: "Sharing applications, success stories and lessons learned in reliability and maintainability engineering." The deadline for proposal submissions is January 27, 2006. More information can be found on the ARS Asia Pacific Web site at You can also e-mail
* International Mobility Engineering Exposition 2005 - SAE India will be organizing the International Mobility Engineering - Congress and Exposition in Chennai, India on October 23-25, 2005. SAE India is the Engineering Society for Advanced Mobility for Land, Sea, Air and Space, and a member of FISITA, which is a confederation of automotive engineering societies from over 30 countries having the reach of the entire automotive fraternity across the globe. Pantelis Vassiliou, CEO and President of ReliaSoft, will be the Keynote Speaker under the topic of "Testing" on October 25th. ReliaSoft India ( have a booth during all the three days of the exposition and is also planning to offer technical presentations on our products during this time. For more information, please visit
Public Training Event Calendar
November 2005
November 14 - 18, 2005: MSMT Foundations in Tucson, Arizona
November 14 - 18, 2005: MSMT Foundations in Singapore
November 21 - 25, 2005: MSMT Foundations in Melbourne, Australia
December 2005
December 7 - 9, 2005: RS 521 QALT Boot Camp in Tucson, Arizona
December 7 - 9, 2005: RS 511 Reliability Growth Analysis and RGA in Tucson, Arizona
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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