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

Issue 52, June 2005

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

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Hot Topics

Standards Based Reliability Prediction: Applicability and Usage to Augment RBDs

Part III: Completing the Picture: Using Lambda Predict to Augment your BlockSim RBDs

This is the third part of a three-part series about standards based reliability prediction and ReliaSoft's newly introduced Lambda Predict software package. In this article, we study an example of an aircraft electronics parts manufacturer that is analyzing the reliability of a new design for a planes Radio Control unit, which consists of a Servos subsystem and a Receiver subsystem in a series configuration (reliability-wise). The design team is required to meet a reliability goal of R(50,000h) = 0.99 before the design is given approval and a prototype based on this design can be produced.


The manufacturer has tested the Servos subsystem in a previous application and determined its reliability model (Weibull with β=1.5, η=900,000 h) using Weibull++. However, the Receiver is a new concept design that the company has not manufactured yet. As a result, the company has no in-house tests or field failure data that describe the Receivers reliability distribution. Therefore, Lambda Predict will be used to perform standards based reliability prediction for the Receiver subsystem. The Receivers predicted reliability can then be incorporated into the BlockSim RBD to complete the reliability analysis of the Radio Control unit.

To read more, see 

Reliability Basics
Introduction to Developmental Test Analysis With The Lloyd-Lipow Model

Lloyd and Lipow (1962) considered a situation in which a test program is conducted in N stages, each stage consisting of a certain number of trials of an item undergoing testing, and the data are recorded as successes or failures. All tests in a given stage of testing involve similar items. The results of each stage of testing are used to improve the item for further testing in the next stage. This article explains the Lloyd-Lipow model and parameter estimation methods for the model.

To read more, see 

Tool Tips
  • When using RCM++ to compare the costs of various maintenance strategies, what types of maintenance actions can be considered?

  • How can I use an action or a task more than once in my FMEA or RCM analysis?

To read more, see 

Hot News
RENO: Probabilistic Event and Risk Analysis

If you can flowchart it...
           you can simulate it!

ReliaSoft is set to unveil RENO! ReliaSoft is set to unveil RENO next month. RENO, through its unique and innovative design, will usher in a new era in simulation analyses. RENO, a visual Stochastic Event Simulation Tool, is the most intuitive, user friendly and, might we say, fun and addictive platform for building and running complex simulations for any probabilistic scenario. Using RENO, you can build models for complex reliability analysis, risk and safety analysis, maintenance planning or, if you prefer, optimize your stock portfolio or test your blackjack strategy!

  • For more details on RENO as well as case studies showing it use see
  • To request a demo copy of this innovative product contact ReliaSoft.
* 2006 ARS Call for Presentations - The 2006 Applied Reliability Symposium, slated for Orlando, FL on June 14 - 16, 2006, is currently accepting presentation proposals that address the Symposium theme: "Sharing applications, success stories and lessons learned in reliability and maintainability engineering." The deadline for proposal submissions is August 29, 2005. Subjects that will be covered in the 2006 Symposium include:
  Warranty reduction
  Reliability as an investment, not a cost
  Specifying reliability and reliability metrics
  Supplier management
  Data collection, management and analysis
  Reliability and safety
  Reliability and market share
  Reliability testing
  Software reliability
  Manufacturing reliability
For more information, please visit the ARS Web site at or e-mail
* Microsoft Gold Certified PartnerReliaSoft is now a Microsoft Gold Certified Partner! Great quality and reliability comes from great planning, control and testing. It's a fact that customers rely upon when choosing ReliaSoft software. This commitment to excellence has also been recognized by Microsoft, making ReliaSoft the only Independent Software Vendor specializing in Reliability to be a Microsoft Gold Certified Partner - the top level of Microsoft solutions partners.
* View Event Photos and Order Proceedings from ARS 2005 The 2005 International Applied Reliability Symposium was held in San Diego, California on May 18 - 20, 2005. Thank you to all who participated! The Proceedings Order Form and the Photo Album are now available at
Public Training Event Calendar
June 2005
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 Singapore
June 23 - 24, 2005: Failure Modes, Effects and Criticality Analysis and Xfmea in Shah Alam, Malaysia
June 27 - July 1, 2005: MSMT Foundations in Manchester, UK
July 2005
July 11 - 15, 2005: MSMT Foundations in Suzhou, China
July 13, 2005: Introduction to Reliability Concepts, Principles and Applications in Mumbai, India
July 15, 2005: Introduction to Reliability Concepts, Principles and Applications in Chennai, India
July 19, 2005: Introduction to Reliability Concepts, Principles and Applications in Manila, Philippines
July 25 - 29, 2005: MSMT Foundations in Philippines
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
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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