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

Issue 51, May 2005

*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

Standards Based Reliability Prediction: Applicability and Usage to Augment RBDs
Part II: The Standards for Reliability Prediction

Reliability prediction plays a major role in many reliability programs across government and industry. Standards based reliability prediction relies on defining failure rates for the components of a system based on predefined standards, depending on the types of components, the use environment, the way the components are connected and the reliability prediction standard. These component failure rates are then used to obtain an overall system failure rate.


Over the past few decades, several standards have been introduced by various governments and industry organizations to assist in conducting this type of analysis. The standards define models for different component types based on test data. The models assume a constant failure rate (i.e. no wearout or early failures problem), which generally describes the useful life of a component where failures are considered random events. This article presents an overview of the common standards that are available in Lambda Predict as different modules.

To read more, see 

Reliability Basics

Utilizing Residual Plots in Accelerated Life Testing Data Analysis

When analyzing accelerated life testing data, it is important to assess model assumptions, discover inadequacies in the model, note extreme observations and assess the possibility that the test did not account for important factors. One way to perform such verifications is through the use of residual analysis for reliability, which consists of analyzing the results of a regression analysis by assigning residual values to each point in the data set and plotting these residuals. Three types of residual plots are available in ALTA 6: the Standardized Residuals plot, the Cox-Snell Residuals plot and the Standardized vs. Fitted Value plot. This article presents descriptions of the plot types and their benefits.

To read more, see 

Tool Tips
  • How are the values in the AVGOF and AVPLOT columns calculated in Weibull++'s Distribution Wizard?

  • How can I use Weibull++ to predict the optimum replacement time or the remaining life of a product?

  • I have BlockSim version 6.2 and am trying to use container blocks and mirrored blocks; however, the options to add these blocks are not available to me. How can I add container blocks and mirrored blocks to my diagrams?

To read more, see 

Hot News
* RCM++ Now Available - ReliaSoft is proud to announce a new software program for engineers with a need to perform Reliability Centered Maintenance (RCM) analysis. ReliaSoft's RCM++ facilitates analysis, data management and detailed reporting associated with RCM analysis, integrated with full-featured FMEA/FMECA capabilities. The software supports all of the major industry standards (such as MSG-3, SAE JA1012 and NAVAIR 00-25-403 for RCM and SAE J1739, AIAG FMEA-3 and MIL-STD-1629A for FMEA/FMECA) with extensive capabilities to customize the interface and reports to meet specific needs. The software also allows you to estimate optimum maintenance intervals and to compare the operational costs of various maintenance strategies. Detailed information and evaluation copies are available online now at:
* Xfmea 3 Major Version Upgrade Released Xfmea has been officially updated with significant enhancements to the software's features and functionality. New features include an Analysis Planning utility, linked Actions, Functional Block Diagrams and much more. For a complete overview of the new features, please visit:
* Localized Reliability Training Do you have an overseas office in need of reliability training? Localized training seminars are offered outside of the U.S. by other ReliaSoft offices and/or ReliaSoft partners. These courses are offered in languages other than English (e.g. Portuguese, Chinese and Spanish) and have been modified to meet specific regional needs. View a list of localized seminars at:
* Last Minute Registrations to ARS 2005 Event staff will be available at the Catamaran Resort to accept walk-in registrations to the International Applied Reliability Symposium this month (May 18 - 20) in San Diego, CA. Resort staff are available to assist you with lodging in the immediate area, as the Catamaran is now booked to capacity. Simply call the Catamaran Reservation line for guidance (there are many options nearby): 1-800-422-8386.
Events and Public Training Calendar
May 2005
May 18 - 20, 2005: 2005 International Applied Reliability Symposium in San Diego, California
June 2005
June 8 - 10 2005: QALT Boot Camp and Reliability Growth Analysis and RGA in Tucson, Arizona

June 16 - 17, 2005: 2005 International Applied Reliability Symposium, South America in Rio de Janeiro, Brazil

June 20 - 21, 2005: Failure Modes, Effects and Criticality Analysis and Xfmea in Shah Alam, Malaysia
June 23 - 24, 2005: Failure Modes, Effects and Criticality Analysis and Xfmea in Singapore
June 27 - July 1, 2005: MSMT Foundations in Manchester, UK
July 2005
July 11 16, 2005: MSMT Foundations in Suzhou, China
August 2005
August 18 - 19, 2005: 2005 International Applied Reliability Symposium, Asia Pacific in Singapore
August 29 - September 2, 2005: MSMT Foundations in San Diego, California
More Reliability Training Seminars...
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 2005 ReliaSoft Corporation, ALL RIGHTS RESERVED