| In
this issue: |
Issue 86,
April 2008
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Reliability HotWire is a
service of ReliaSoft
Corporation
To subscribe or update your e-mail preferences, go to
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Hot Topics
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Degradation Analysis in
Destructive Testing - Part II
Degradation analysis is an important data analysis technique for
projecting failure data from the degradation history of a
quality or performance characteristic that is associated with
the reliability of a product. This approach typically requires
that the degradation be measured for multiple units over time.
However, in some cases, destructive testing is necessary to
obtain degradation measurements and taking multiple measurements
over the life of the same unit is therefore not feasible. The
previous
month's issue of the Reliability HotWire
presented an approach for handling such a data analysis problem
and predicting a failure distribution model using
ALTA 7. In this article an alternative method is
presented using
Weibull++ 7.To read more, see
http://www.weibull.com/hotwire/issue86/hottopics86.htm
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Reliability Basics |
Discussion of the Residual Sum of Squares in DOE
Variation occurs in nature, be it the tensile strength of a
particular grade of steel, the caffeine content in your energy
drink or the distance traveled by your vehicle in a day.
Variations are also seen in the observations recorded during
multiple executions of a process, even when conditions are kept
as homogeneous as possible. The natural variations that occur in
a process, even when all factors are maintained at the same
level, are often termed noise. In Design of Experiments
(DOE) analysis, a key goal is to study the effect(s) of one or
more factors on measurements of interest (or responses)
for a product or process. It thus becomes extremely important to
distinguish the changes in the response caused by a factor from
those caused by noise. A number of statistical methods,
generally referred to as hypothesis testing, are
available to achieve this. These methods normally involve
quantifying the variability due to noise or error in conjunction
with the variability due to different factors and their
interactions. It is then possible to determine whether the
changes observed in the response(s) due to changes in the
factor(s) are significant. In this article, we will discuss
different components of error and give an example of how the
error and each of its components are defined and used in the
context of hypothesis testing.
To read more, see
http://www.weibull.com/hotwire/issue86/relbasics86.htm
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Tool Tips |
- Can I edit the optimal
solutions in
DOE++s Optimization tab?
-
What functionality is available in the Tasks area of my
XFRACAS Portal page?
To read more, see
http://www.weibull.com/hotwire/issue86/tooltips86.htm
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Latest Software Updates |
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DOE++ (1.0.1) has been
released! In addition, new service releases are now available
for Weibull++
(SR 7.5.4), ALTA
(SR 7.5.4) and RENO (SR
1.0.10). 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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New Software Release! - ReliaSoft's
DOE++
software was officially released in March and is now
available for purchase. This powerful software package
facilitates traditional Design of Experiments (DOE)
techniques and also expands upon standard methods to
provide the proper analysis treatment for interval and
right censored data - offering a major breakthrough
for reliability-related analyses! For more
information about the product's features and
applications, please visit
http://DOE.ReliaSoft.com. |
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New DOE Training Seminar - Mark your
calendars for
June 2-4, 2008 to attend the
RS 588 Design of Experiments (DOE) training
seminar in Tucson. This three-day course begins with DOE
fundamentals and continues with advanced concepts,
principles and requirements. Participants will be
thoroughly exposed to DOE through theoretical and
hands-on sections that will allow them to perform DOE
methods. They will also learn how to analyze data from
such experiments, including factorial design, fractional
factorial design, robust design, response surface
methodology (RSM) and mixture design. For more
information on this course, please visit
http://www.ReliaSoft.com/seminars/gencourses/rs588.htm.
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ARS Advanced Registration Deadline Act now
to take advantage of the $200 discount for this
year's International Applied Reliability Symposium,
North America, which will be held June 17-20, 2008
at the
Grand Sierra Resort in Reno, Nevada. Visit
http://www.ARSymposium.org/register.htm to register
by April 23, 2008 for this special rate. Hotel
rooms at the Grand Sierra Resort will also need to be
reserved by May 18, 2008 to be eligible for the
negotiated Symposium rate (see
http://www.ARSymposium.org/2008/ars2008_location.htm
for more details). |
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Whirlpool Corporate Partner License -
Whirlpool Corporation has demonstrated its total
commitment to reliability engineering practices by
recently becoming an official ReliaSoft Global
Corporate Partner. This agreement provides all
Whirlpool employees around the world with full unlimited
access to all standalone products offered directly by
ReliaSoft as well as access to all ReliaSoft training
material. Welcome aboard, Whirlpool! Learn more about
ReliaSoft's Corporate Partner License option at
http://www.ReliaSoft.com/license.htm#partner. |
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Upcoming Public
Training Event Calendar |
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April 2008 |
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April 14 - 15, 2008:
RS 480 Reliability
Centered Maintenance
in
Warsaw, Poland |
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April 17 - 18, 2008:
International Applied
Reliability Symposium
in
Chennai, India |
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April 21 - 25, 2008:
MSMT Foundations
in
Tucson, Arizona |
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April 23 - 25, 2008:
RS 521 Advanced QALT
in
Singapore |
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May 2008 |
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May 12 - 14, 2008:
RS 522 Advanced System
Analysis
in
Manchester, UK |
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May 14 - 16, 2008:
RS 521 Advanced QALT
in
Tucson, Arizona |
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May 14 - 16, 2008:
RS 511 Adv. Reliability
Growth Analysis
in
Tucson, Arizona |
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May 15 - 16, 2008:
RS 470 FMEA/FMECA
in
Manchester, UK |
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June 2008 |
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June 2 - 4, 2008:
RS 588 Design of
Experiments (DOE)
in
Tucson, Arizona |
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June 30 - July 4, 2008:
RS 540 Reliability and
Maintainability Analysis for Repairable
Systems
in
Singapore |
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June 5 - 6, 2008:
RS 480 Reliability
Centered Maintenance
in
Tucson, Arizona |
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June 9 - 13, 2008:
MSMT Foundations
in
Turin, Italy |
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June 11 - 13, 2008:
RS 560 Introduction to
Design for Reliability
in
Bangalore, India |
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June 17 - 20, 2008:
International Applied
Reliability Symposium
in
Reno, Nevada |
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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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