In this issue:

Issue 80, October 2007

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

Reliability HotWire is a service of ReliaSoft Corporation

To subscribe or update your e-mail preferences, go to

Hot Topics

Analyzing Excess System Downtime Through System Modeling
A common metric of interest for repairable systems is the likelihood (or number of times) that a downtime lasts beyond a certain limit. In some circumstances, failures (or a certain number of failures) might be tolerated as long as they do not cause significant downtime. In this article, we will present an approach to estimate the probability that a downtime exceeds a certain time using BlockSim 7 and Weibull++ 7.

To read more, see 

Reliability Basics

Reliability Requirements and Specifications
One of the most essential aspects of a reliability program is defining the reliability goals that a product needs to achieve. This article will explain the proper ways to describe a reliability goal and also highlight some of the ways reliability requirements are commonly defined improperly.

To read more, see 

Tool Tips
  • When should rank regression or maximum likelihood estimation (MLE) be used when conducting life data analysis in Weibull++?
  • How can I model a specific maintenance routine in a phase diagram in BlockSim?

To read more, see 

Hot News

Call for ARS 2008 Presenters - Now that you have spent years developing and polishing your reliability engineering skills, we want you to discuss your experiences with colleagues in the discipline. The 2008 International Applied Reliability Symposium, North America will be held June 17 - 20, 2008 in Reno, Nevada. This annual event provides a forum for expert presenters from industry and government to come together with reliability practitioners from all over the world to discuss the application of reliability principles to meet real world challenges. You are invited to submit presentation proposals that address the Symposium's annual theme: "Sharing applications, success stories and lessons learned in reliability and maintainability engineering." The primary author for each presentation delivered at the Symposium will receive complimentary registration to the event. For more information and the required proposal submission form, please visit

Some enhancements to the program that are soon to be announced for ARS 2008 include:

  • Golf Tournament:  Attendees have the option to register for a golf tournament on Monday -- networking and socializing while enjoying mountain views.
  • Excellent Presentation Awards Luncheon: A hosted luncheon on Thursday will provide an opportunity for attendees to interact with colleagues (including expert presenters) and we will present monetary awards for the top 3 presentations (as voted by attendees).
  • University Research Presentations: On Friday, the Symposium will offer a full day of academic-oriented presentations, in which leading universities will present on their latest research and discoveries.

For more information, visit


2008 Seminar Calendar Updated - ReliaSoft's Worldwide Seminar Calendar is now online and available for review! Over 50 public seminars, around the world, have been scheduled for 2008. Explore our easy-to-use Seminar Calendar to quickly locate an event near you. Budgeting for next year just got easier:


Reliability Centered Maintenance Training - RS 480 - Introduction to RCM Principles and Applications and RCM++ training seminar will be held November 15 - 16, 2007 in Tucson, AZ. Day 1 presents an introduction to Reliability Centered Maintenance (RCM) and an overview of the fundamental techniques/procedures. The morning session of Day 2 introduces ReliaSoft's RCM++ software and covers many of the features of this versatile application, from setting up the database to performing RCM analyses and generating reports. The afternoon session of Day 2 is a hands-on workshop using the RCM++ software, which includes working through a detailed training guide with step-by-step instructions to complete sample analyses as well as discussion centered on implementation options for your particular analysis procedures and reporting requirements. For more details or to register, go to

Upcoming Public Training Event Calendar
October 2007
October 15 - 19, 2007: MSMT Foundations in Manchester, UK
October 17 - 19, 2007: RS 525 Probabilistic Event Analysis in Tucson, Arizona
October 22 - 24, 2007: RS 511 Adv. Reliability Growth Analysis in Singapore
October 22 - 24, 2007: RS 511B Adv. Reliability Growth Analysis in Turin, Italy
October 25 - 26, 2007: International Applied Reliability Symposium in Singapore
October 25 - 26, 2007: RS 470 FMEA/FMECA in Turin, Italy
November 2007
November 5 - 9, 2007: MSMT Foundations in Tucson, Arizona
November 15 - 16, 2007: RS 480 Reliability Centered Maintenance in Tucson, Arizona
November 19 - 23, 2007: MSMT Foundations in Melbourne, Australia
November 26 - 30, 2007: MSMT Foundations in Arcachon, France
December 2007
December 3 - 7, 2007: RS 540 Repairable Systems Analysis in Singapore
December 5 - 7, 2007: RS 511 Adv. Reliability Growth Analysis in Tucson, Arizona
December 5 - 7, 2007: RS 521 Advanced QALT in Tucson, Arizona
December 10 - 11, 2007: RS 401(C) Life Data Analysis (Condensed) in Chennai, India
December 12 - 13, 2007: RS 522(C) Advanced System Analysis (Condensed) in Chennai, India
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.

Copyright 2007 ReliaSoft Corporation, ALL RIGHTS RESERVED