| In
this issue: |
Issue 81,
November 2007
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Reliability HotWire is a
service of ReliaSoft Corporation
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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
http://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
http://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
http://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. We can be reached by e-mail at
HotWire@ReliaSoft.com,
or by standard mail at 1450 S. Eastside Loop, Tucson, AZ 85710-6703,
USA. |
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Copyright
© 2007 ReliaSoft Corporation,
ALL RIGHTS RESERVED
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