| In
this issue: |
Issue 86,
April
2008
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Reliability HotWire is a
service of ReliaSoft Corporation
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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 |
|
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 |
 |
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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