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In this issue:

Issue 78, August 2007

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

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Hot Topics

Analysis and Modeling of Grouped and Opportunistic Preventive Maintenance
When planning preventive maintenance strategies, considerations of the overall benefit for the whole system should supersede the optimum plan for each component separately. Maintenance plans should be addressed in a holistic way to optimize the cost of ownership of the system. For example, sometimes it is less expensive and more convenient to perform preventive maintenance on a component in a system when performing a repair action on another component in the system rather than at the optimum time for performing the preventive maintenance for that component. A repairable system reliability and availability modeling and simulation tool, such as BlockSim 7, can help model your system and assess different maintenance strategies to determine what will be best for the overall system. This article discusses how to model grouped and opportunistic maintenance strategies in BlockSim.

To read more, see 

Reliability Basics

Reliability Growth Analysis with Missing or Erroneous Data
Most of the reliability growth models used for estimating and tracking reliability growth based on test data assume that the data represents all actual system failure times (complete data) consistent with a uniform definition of failure. In practice, unfortunately, things do not always work out this way. There might be cases in which training issues, oversight, biases, misreporting, human error, technical difficulties, loss of data, etc. might render a portion of the data erroneous or completely missing. Without applying "corrections" to the way the data set is handled and the way the models and their parameters are derived, "standard" analysis may result in distorted estimates of the growth rate and actual system reliability. This article discusses a practical reliability growth estimation and analysis procedure to treat data that contains anomalies over an interval of the test period. ReliaSoft's RGA 6 software is used to perform the analysis.

To read more, see 

Tool Tips
  • How can I customize Lambda Predict reports to meet my particular needs?
  • Should I use FMEA Hierarchy or the FMEA Worksheet in Xfmea/RCM++?

To read more, see 

Latest Software Updates
New service releases are now available for Xfmea Standard (SR 4.0.3), Xfmea Enterprise (SR 4.0.3) and RCM++ (SR 4.0.3). To determine the compile revision of the application on your computer, select About from the Help menu. More Software Downloads...


Application Date Created Version
Xfmea Standard 7/19/07 4.0.3
Xfmea Enterprise 7/19/07 4.0.3
RCM++ 7/19/07 4.0.3
Hot News

IIE awards ReliaSoft Scientist Dr. Harry Guo, ReliaSoft's Director of Theoretical Development, and his co-authors received the Best Paper Award of Quality Control and Reliability at the Industrial Engineering Research Conference, Nashville, Tennessee, May 19-23, 2007, for the paper titled "Multiscale Monitoring of Autocorrelated Processes Using Wavelets." This paper was chosen to be the best amongst 66 others, written by professors, engineers and some very well-known names in Reliability and Quality Engineering, and it thus represents a great achievement. ReliaSoft is proud to have the best Theoretical and Research Department in the business.


ARS Asia Pacific - Here is a great opportunity to mingle with the growing ranks of reliability and quality professionals in the Asia Pacific arena. If you have not attended this event in the past, then we encourage you to see for yourself why it has become such a popular and important annual event. The International Applied Reliability Symposium - Asia Pacific will be held at the Orchard Hotel Singapore in Singapore on October 25 - 26, 2007. The Symposium will focus on "sharing applications, success stories and lessons learned in reliability and maintainability engineering." Fact sheets and registration information can be obtained at:


Design for Reliability (DFR) Training - It's not too late to sign up for a newly released Design for Reliability (DFR) training course. This class brings together the entire set of methods and tools that support product and process design (during the Product Development Cycle) to ensure customer expectations for reliability are fully met. ReliaSoft's RS 560 - Introduction to Design for Reliability training course provides an introduction to individual DFR methods, the proper use of relevant software tools, key elements of successful DFR programs, common pitfalls to avoid and other useful topics. The course will be offered on September 5 - 7, 2007 in San Diego, California. For more details, see


Advanced System Reliability/Maintainability Analysis Training This advanced training seminar is available only twice a year in the USA, so start planning now if Reliability Block Diagramming and/or Fault Tree Analysis techniques are important to you. Keep in mind, too, that the new BlockSim 7 software will be used to help convey concepts, so you are sure to get into to some fun and challenging coursework. RS 522 - Advanced System Reliability/Maintainability Analysis and BlockSim will be held September 17-19, 2007 in Tucson, Arizona. For more details, see


Failure Modes, Effects & Criticality Analysis Training This course introduces the concepts and procedures for FMEA/FMECA with an emphasis on the use of ReliaSoft's Xfmea software for data capture, analysis and reporting. Topics include analysis process, risk assessment methods, APQP integrations, project success factors, and more. RS 470 - Failure Modes, Effects and Criticality Analysis will be held September  20-21, 2007 in Tucson, Arizona. For more details, see

Upcoming Public Training Event Calendar
August 2007
August 20 - August 21, 2007: RS 480 Reliability Centered Maintenance and RCM++ in Chennai, India
August 27 - August 31, 2007: MSMT Foundations in San Diego, California
September 2007
September 3 - 7, 2007:  MSMT Foundations in Warsaw, Poland
September 5 - 7, 2007: RS 560 Introduction to Design for Reliability in San Diego, California
September 17 - 19, 2007:  RS 522 Advanced System Analysis and BlockSim in Tucson, Arizona
September 20 - 21, 2007:  RS 470 FMEA/FMECA and Xfmea in Tucson, Arizona
October 2007
October 8 - 9, 2007:  RS 401(C) Life Data Analysis and Weibull++ in New Delhi, India
October 15 - 17, 2007: MSMT Foundations in Manchester, UK
October 17 - 19, 2007:  RS 525 Advanced Probabilistic Event and Risk Detection Analysis and RENO in Tucson, Arizona
October 22 - 24, 2007:  RS 511 Reliability Growth Analysis and RGA in Singapore
October 22 - 24, 2007:  RS 511B Reliability Growth Analysis and RGA in Turin, Italy
October 25 - 26, 2007:  RS 470 FMEA/FMECA and Xfmea in Turin, Italy
October 25 - 26, 2007:  International Applied Reliability Symposium in Singapore
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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