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

Issue 25, March 2003

*Hot Topics
*Reliability Basics
*Tool Tips
*Latest Software Updates
*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  
Introduction to Probability Theory 
BlockSim 6 is now available for system reliability, maintainability, availability, optimization, throughput analysis and much more. In past issues of the HotWire and Reliability Edge,many topics regarding system reliability have been discussed, including k-out-of-n configuration and allocation and optimization. In last month's issue of the HotWire, the topic of an imperfect repair was presented. But what are some of the basic concepts that are the building blocks of system reliability and probability theory? This article will present an introduction to these concepts.

To read more, see 

Reliability Basics  

Understanding Biasedness
There are many properties associated with parameter estimates, such as minimum variance, sufficiency, consistency, efficiency, completeness and biasedness. The property called biasedness is commonly discussed within reliability engineering and statistics, but what does it really mean? What is a biased estimator? This article will explore the concept of biasedness and try to shed some light on this often misunderstood topic.

To read more, see 

Tool Tips  
  • How can I quickly set the properties for multiple blocks within BlockSim 6?

  • What additional resources are available to discuss questions regarding ReliaSoft software products?

To read more, see 

Latest Software Updates
BlockSim 6, the ultimate system visualization tool, is now available. In addition, a new service pack for ALTA 6 (SP4) is now available for download. To determine the compile revision of a ReliaSoft application on your computer, select About from the Help menu.


Application Date Created Version


ALTA 6 2/28/03 6.0.10
ALTA 6 Service Pack 2/28/03 SP4 CRV 10


BlockSim 6

3/11/03 6.0.2
Hot News
* Announcing Special Pre-Release Pricing on Xfmea ($1595) - By ordering Xfmea before the official product release date, you will receive a $400 discount off of the standard price! Xfmea is still on schedule for release at the end of this month and will retail for $1995. This software has been designed to facilitate the FMEA/FMECA process and provide flexible data management and reporting capabilities. For more information, please visit:
* BlockSim 6 was officially released on February 28th!!! - The ultimate system visualization tool, BlockSim 6 is now available for evaluation and purchase. Pre-release orders have been filled. For more information, please visit our Web site or contact the sales team directly.
* ReliaSoft at National Manufacturing Week 2003 - Thanks to everyone who stopped by our booth in Chicago, IL last week. We look forward to helping you streamline the manufacturing process, decrease costs, minimize downtime and increase productivity over the years to come.
* Calendar of Public Events:


Advanced System Analysis and BlockSim Training Seminar - March 24 - 26, 2003 in Tucson, AZ. An intensive theoretical and hands-on course (utilizing BlockSim) which exposes the attendee to the advanced concepts, principles and requirements for performing detailed system reliability, maintainability, availability and related analyses. For more information, see
FMEA/FMECA and Xfmea Training Seminar - March 27 - 28, 2003 in Tucson, AZ. This course offers an overview of FMEA/FMECA analysis procedures with emphasis on the use of the Xfmea software. For more information, see
- April Quality Expo International 2003 - On April 15 - 17, 2003, ReliaSoft will be in Chicago, IL once again to perform demonstrations and provide information on ReliaSoft's variety of products and services. Please visit the following link for more information on the show:
QALT Boot Camp Training Seminar - April 30 - May 2, 2003 in Tucson, AZ. This intensive three day course covers advanced topics, concepts and applications of quantitative accelerated life testing (QALT) analysis and ReliaSoft's ALTA PRO software. For more information, see
- May Rio de Janeiro International Reliability Symposium - During this symposium, held May 8 - 9, 2003 in Rio de Janeiro, Brazil, engineers will be examining current reliability practices, issues and applications through lectures and discussions - featuring experts and practitioners from both academia and industry. This symposium is sponsored by ReliaSoft Brasil.
Master the Subject, Master the Tools Training Seminar for life data analysis, accelerated life data analysis and system reliability analysis: May 19 - 23, 2003 in Tucson, AZ. For more information, see
* Web Site Enhancement - When will ReliaSoft's training seminars be offered within your region of the world? Check out our new International Seminar Locator.
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 2003 ReliaSoft Corporation, ALL RIGHTS RESERVED