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this issue: |
Issue 94,
December 2008
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Reliability HotWire is a
service of ReliaSoft
Corporation
To subscribe or update your e-mail preferences, go to
http://www.weibull.com/hotwire/index.htm
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Happy Holidays!
From all of us at ReliaSoft... we wish you a joyous
holiday season and a new year of peace and
happiness.
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Hot Topics
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Using
DOE++ to Analyze Unbalanced Designs
One of the purposes of using Design of Experiments (DOE) is to
evaluate which factors have significant effects and how they
affect the response of interest to the experimenters. For
example, one might examine how the speed and the type of
gasoline affect the mileage of a vehicle and which factor has
the greater impact. When DOE is used by reliability engineers,
the response of interest is product life; a reliability engineer
will use DOE to investigate which stresses influence product
life and how much they affect life. In order to obtain an
accurate estimation, experiments need to be carefully designed.
A general requirement is that the design needs to be "balanced."
In this article, we will discuss what an unbalanced design is
and how it can be analyzed correctly using ReliaSoft's
DOE++ software.
To read more, see
http://www.weibull.com/hotwire/issue94/hottopics94.htm
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Reliability Basics |
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MTTF, MTBF, Mean Time between
Replacements and MTBF with Scheduled Replacements
Seasoned reliability engineers know that there is a great deal
of discussion and confusion regarding the terms MTTF and MTBF.
We certainly hope that the addition of two more terms in
the title won't scare readers away! In fact, the purpose of this
article is to clear up the confusion by defining these terms and
using examples to illustrate their differences, as well as
discussing the applications of each term. ReliaSoft's software
packages
Weibull++,
RGA and
BlockSim will be
used for illustration.
To read more, see
http://www.weibull.com/hotwire/issue94/relbasics94.htm
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Tool Tips |
- Can I compare analysis
results using different settings in
DOE++?
- What are the Severity
Class and Failure Probability ratings scales for in Xfmea/RCM++?
To read more, see
http://www.weibull.com/hotwire/issue94/tooltips94.htm
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Latest Software Updates |
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New service releases are now
available for Weibull++
(SR 7.5.6),
ALTA (SR 7.5.6) and
DOE++ (SR 1.0.3). To
determine the compile revision of the application on your
computer, select About from the Help menu.
More Software Downloads...
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Hot News |
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55th Annual Reliability & Maintainability Symposium
(RAMS) - ReliaSoft Corporation will be a
participant and presenter at RAMS again this winter.
This years presentations will include:
"Improving the
1-Parameter Weibull: A Bayesian Approach"
By Alexander Aron, Dr. Harry Guo and Adam Mettas,
ReliaSoft Corporation
"Warranty
Prediction for Products with Random Stresses and
Usages"
By Dr. Harry Guo, Arai Monteforte and Adam Mettas,
ReliaSoft Corporation
"Introduction to
R&M Management (Reliability from Design Inception to
Product Retirement)"
By Dr. Duane Dietrich, ReliaSoft Corporation
RAMS 2009 will be held
at The Worthington, A Renaissance Hotel, in
Fort Worth, Texas on January 26-29, 2009. As
always, our staff of reliability experts will be on hand
to provide you with useful information and to
demonstrate the capabilities of ReliaSoft's complete
suite of tools, including our Web-based
XFRACAS
application -- so be sure to stop by our booth! For an
advance program and registration information, please
visit http://www.rams.org.
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ReliaSoft Funds One Year Scholarship - In
continued support of the ReliaSoft Risk, Reliability
and Maintainability Research Alliance that was
established through the University of Arkansas last
year, ReliaSoft is proudly providing one year of
financial support to a chosen graduate student at this
institution. |
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North American ARS Proposal Submissions - We
have been very pleased with the large turnout of
qualified proposal submissions for next years Applied
Reliability Symposium. Now that the official submission
date (Dec. 5th) has passed, our committee will work
diligently to select the finalists. A special thank
you goes out to everyone who participated in this years
submission drive. It has been exciting to see so
many professionals show interest. |
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Upcoming Public
Training Event Calendar |
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December 2008 |
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December 15 - 19, 2008:
RS 540 Reliability and
Maintainability Analysis for Repairable
Systems
in
Chennai, India |
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January 2009 |
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January 19 - 21, 2009:
RS 560 Fundamentals of
Design for Reliability
in
Bangalore, India |
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February 2009 |
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February 2 - 6, 2009:
MSMT Foundations
in
Frankfurt, Germany |
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February 18 - 20, 2009:
RS 522 Advanced System
Reliability / Maintainability Analysis
in
Turin, Italy |
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February 23 - 27, 2009:
MSMT Foundations
in
Tucson, Arizona |
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February 23 - 27, 2009:
MSMT Foundations
in
Penang, Malaysia |
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March 2009 |
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March 16 - 18, 2009:
RS 522 Advanced System
Reliability / Maintainability Analysis
in
Tucson, Arizona |
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March 16 - 20, 2009:
RS 540 Reliability and
Maintainability Analysis for Repairable
Systems
in
Jakarta, Indonesia |
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March 19 - 20, 2009:
RS 470 Failure Modes,
Effects and Criticality Analysis
in
Tucson, Arizona |
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March 25 - 27, 2009:
International Applied
Reliability Symposium
in
Barcelona, Spain |
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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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Copyright 2008 ReliaSoft
Corporation, ALL RIGHTS RESERVED
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