In this issue:

Issue 99, May 2009

*Hot Topics
*Reliability Basics
*Tool Tips
*Latest Software Updates
*Hot News
*Contribute to HotWire

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Hot Topics

Hands On: Reliability DOE with Covariates
In this article we present a step-by-step practical application of a reliability DOE using ReliaSoft’s DOE++ software. We also introduce the concept of covariates, which are uncontrolled factors that can influence the response. Introducing covariates in experiment design can provide a more accurate analysis and interpretation of the results.

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Reliability Basics

Reliability Allocation and Optimization Using BlockSim
In last month's Reliability Basics article, we discussed some popular reliability allocation methods, including the equal, AGREE, ARINC, feasibility of objectives and repairable systems apportionment techniques. We also presented some practical applications using ReliaSoft's Lambda Predict software. The methodologies discussed are widely used in many reliability prediction standards and are useful when limited reliability data exists, usually during the initial design phase of a new product. When there are specific details concerning the failure rate behavior of the product and there is a more complex configuration instead of just components in series, we can go one step further and incorporate a more detailed analysis of reliability allocation that is free of the assumptions that are necessary when working with limited data. In this article we present a more advanced method for reliability allocation that is free of these assumptions and can be performed with ReliaSoft's BlockSim 7 software.

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Tool Tips
  • How can I get more information about the minimal cut sets for my BlockSim diagram?
  • How can I plot multiple items together in Lambda Predict 3? Can I save my plots?

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Latest Software Updates
Lambda Predict 3 (3.0.1) has been released! More Software Downloads...


Application Date Created Version
Lambda Predict    
Lambda Predict 3 5/1/2009 3.0.1
Hot News

Excited About ARS? You Betcha! - There are only a few weeks left to register for the International Applied Reliability Symposium in San Diego, so don't delay! ARS North America will be held at the Catamaran Resort on Mission Bay from June 9 - 12, 2009. To register online, please visit Hotel rooms at the negotiated Symposium rate are subject to availability after May 8, 2009. Please contact the hotel directly to make your reservations today! For more information about ARS, please visit or contact ReliaSoft directly. We can't wait to see you there!


FMEA in Action - The May 2009 edition of appliance DESIGN Magazine features an article titled "Quality and Standards: Preventing Problems," written by our very own Carl S. Carlson. This article focuses on using FMEA early in the design cycle not only to boost reliability (which leads to warranty cost savings, more successful testing programs, improved safety and compliance), but also to increase customer satisfaction. Read the complete article at

About Carl S. Carlson: A seasoned ASQ Certified Reliability Engineer who performs consultation and instruction in the areas of FMEA, reliability program planning and other reliability engineering and management disciplines. For more information about Carl, please visit


New Software Release Available! Lambda Predict 3 features numerous enhancements to improve the user's experience. These include a re-designed user interface and data import wizard, multiple views to facilitate data entry and decision-making, improved functionality for locating and adding predefined components, the ability to create plots to present data from multiple system analyses and support for updated editions of the Bellcore/Telcordia and NSWC (Mechanical) standards. For more information, please visit

Upcoming Public Training Event Calendar
May 2009
May 11 - 15, 2009: RS 540 Reliability and Maintainability Analysis for Repairable Systems in Miri, Sarawak, Malaysia
May 13 - 15, 2009: RS 521 Advanced Accelerated Life Testing Analysis in Tucson, Arizona
May 13 - 15, 2009: RS 511 Application of Reliability Growth Models in Developmental Testing and Fielded Systems in Tucson, Arizona
May 18 - 20, 2009: RS 588 DOE: Experiment Design and Analysis in Bangalore, India
May 25 - 29, 2009: MSMT Foundations in Singapore
May 25 - 26, 2009: RS 470 Failure Modes, Effects and Criticality Analysis in Berlin, Germany
May 27 - 29, 2009: RS 588 DOE: Experiment Design and Analysis in Berlin, Germany
June 2009
June 1 - 3, 2009: RS 588 DOE: Experiment Design and Analysis in Tucson, Arizona
June 4 - 5, 2009: RS 480 RCM Principles and Applications in Tucson, Arizona
June 9 - 12, 2009: International Applied Reliability Symposium in San Diego, California
June 15 - 17, 2009: RS 560 Fundamentals of Design for Reliability in Chennai, India
June 15 - 19, 2009: MSMT Foundations in Bologna, Italy
June 22 - 24, 2009: RS 521 Advanced Accelerated Life Testing Analysis in Warsaw, Poland
July 2009
July 27 - 31, 2009: RS 540 Reliability and Maintainability Analysis for Repairable Systems in Perth, Australia
July 27 - 28, 2009: RS 401(C) Reliability and Life Data Analysis (Condensed) in Pune, India
July 29, 2009: RS 402 Introduction to Accelerated Life Testing Analysis in Pune, 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.

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