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this issue: |
Issue 81,
November 2007
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Reliability HotWire is a
service of ReliaSoft
Corporation
To subscribe or update your e-mail preferences, go to
https://www.weibull.com/hotwire/index.htm
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Hot Topics
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Life Data Analysis of Load Sharing Units
Typically in life data analysis, in a population of similar
units, it is assumed that unit failures are independent from
each other. In other words, one unit's failure does not make the
other unit(s) less or more likely to fail. This independence
assumption is not always valid, however, as there are cases
where a unit's failure affects the failure likelihood of other
unit(s). A common example for this type of dependence is the
load sharing redundant configuration. Examples of units in such
a configuration include pumps, routers and motors. In this
article we present an approach for analyzing data obtained from
units that are in a load sharing relationship using
ALTA 7. The obtained model can also be used in an RBD
analyzed in
BlockSim 7.To read
more, see
https://www.weibull.com/hotwire/issue81/hottopics81.htm
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Reliability Basics |
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Analyzing Success/Failure Data Using the Crow
Discrete Reliability Growth Model
Typical developmental testing reliability growth analysis involves the use
of times-to-failure data obtained from the tested system(s) during the
development program. Many products or systems, such as missiles and air
bags, may not produce times-to-failure data because they are considered one
time/usage (or one-shot) systems. Such scenarios require models other than
the ones used to analyze times-to-failure data. In this article, we cover
the Crow-AMSAA Discrete reliability growth model that is found in
RGA 6.
To read more, see
https://www.weibull.com/hotwire/issue81/relbasics81.htm
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Tool Tips |
- How can you analyze data
sets with more than one failure mode in Weibull++?
- How can you be sure your
software is up to date?
To read more, see
https://www.weibull.com/hotwire/issue81/tooltips81.htm
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Hot News |
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54th Annual Reliability &
Maintainability Symposium (RAMS) -
ReliaSoft Corporation will be a participant and
presenter at RAMS again this winter. The
event will be held at the Palace Station Hotel &
Casino in Las Vegas, Nevada on January
28-31, 2008. This year's Symposium theme: "Dawn to
Dusk - Life Cycle Prescriptions." RAMS
participants are exposed to a wide variety of papers,
tutorials, and panel discussions that share the insight
of industry and government leaders. Our staff of
reliability experts will be on hand to provide
information and demonstrate the capabilities of
ReliaSoft's complete suite of tools, including our
Web-based XFRACAS application. We always look
forward to seeing our old friends and making new ones;
please be sure to stop by our booth! For more
information and an advanced program, see
http://www.rams.org. |
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ReliaSoft's QALT Boot Camp Next Month!
- This unique course expands upon the basics in a
three-day intensive theoretical and hands-on seminar
(utilizing the
ALTA PRO software) that exposes the attendee to
the advanced concepts, principles and requirements for
performing quantitative accelerated life testing.
Special focus will be given to multiple case studies
illustrating QALT principles and a hands-on workshop
where the attendee will solve multiple complex problems
involving data from accelerated life tests. By the
conclusion of this course, the participant will be
thoroughly exposed to QALT and will be able to perform
quantitative accelerated life tests as well as analyze
data from such tests, including tests utilizing multiple
stresses or time-varying stresses (such as step-stress
tests). RS 521 will be held December 5 - 7,
2007 in Tucson, AZ. For more details, see
http://www.ReliaSoft.com/seminars/gencourses/rs521.htm. |
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Call for ARS 2008 Presenters
- Now that you have spent years developing and polishing
your reliability engineering skills, we want you to
discuss your experiences with colleagues in the
discipline.
The
2008 International Applied Reliability Symposium, North
America will be held June 17 - 20, 2008
in Reno, Nevada. This annual event
provides a forum for expert presenters from industry and
government to come together with reliability
practitioners from all over the world to discuss the
application of reliability principles to meet real world
challenges.
You are
invited to submit presentation proposals that address
the Symposium's theme:
"Sharing applications, success stories and lessons
learned in reliability and maintainability engineering."
The primary author for each presentation delivered at
the Symposium will receive complimentary registration to
the event. For more information and the required
proposal submission form, please visit
http://www.ARSymposium.org/present.htm.
Some enhancements to the
program that have recently been announced for ARS
2008 include:
- Golf Outing:
Attendees have the option to register for a golf
outing on Monday -- networking and socializing while
enjoying mountain views.
- Excellent
Presentation Awards Luncheon: A hosted luncheon
on Thursday will provide an opportunity for
attendees to interact with colleagues (including
expert presenters) and we will present monetary
awards for the top 3 presentations (as voted by
attendees).
- University
Research Presentations: On Friday, the Symposium
will offer a full day of academic-oriented
presentations, in which leading universities will
present on their latest research and discoveries.
For more information,
visit
http://www.ARSymposium.org/northamerica/.
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Upcoming Public
Training Event Calendar |
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November 2007 |
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November 15 - 16, 2007:
RS 480 Reliability
Centered Maintenance
in
Tucson, Arizona |
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November 19 - 23, 2007:
MSMT Foundations
in
Melbourne,
Australia |
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November 26 - 30, 2007:
MSMT Foundations
in
Arcachon, France |
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December 2007 |
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December 3 - 7, 2007:
RS 540 Repairable Systems
Analysis
in
Singapore |
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December 5 - 7, 2007:
RS 521 Advanced QALT
in
Tucson, Arizona |
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December 10 - 11, 2007:
RS 401(C) Life Data
Analysis (Condensed)
in
Chennai, India |
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December 12 - 13, 2007:
RS 522(C) Advanced System
Analysis (Condensed)
in
Chennai, India |
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January 2008 |
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January 24 - 25, 2008:
RS 401(C) Life Data
Analysis (Condensed)
in
Bangalore, India |
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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 2007 ReliaSoft
Corporation, ALL RIGHTS RESERVED
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