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In this
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Issue 23,
January 2003
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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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Hot Topics |
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A Look Under the
Hood at the Cumulative Damage Model
Past
issues of the HotWire and
Reliability
Edge have presented examples (see
Analyzing
Step-Stress Data and
Analyzing Accelerated Test Data with Time-Varying Test and Use Stress
Profiles) that utilize the
cumulative damage model. But what is happening behind the scenes?
This article will present the cumulative damage model and how it
is formulated.
To read more, see
http://www.weibull.com/hotwire/issue23/hottopics23.htm
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Reliability Basics
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Comparing Two Data Sets
It is often desirable to be
able to compare two sets of reliability or life data in order to
determine which of the data sets has a more favorable life distribution.
The units from which the data is obtained could either be from two
alternate designs, alternate manufacturers or alternate lots or
assembly lines. Many methods are available in statistical literature
for doing this when the units come from a complete sample, i.e.
a sample with no censoring. This process becomes a little more difficult
when dealing with data sets that have censoring or when trying to
compare two data sets that have different distributions. In general,
the problem boils down to that of being able to determine any statistically
significant difference between the two samples of potentially censored
data from two possibly different populations. This article discusses
some of the methods that are applicable to censored data using Weibull++.
To read more, see
http://www.weibull.com/hotwire/issue23/relbasics23.htm
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Tool Tips |
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Can I change the type of Data Entry Spreadsheet I am using
in Weibull++ once data has already been entered into it and
without having to create a new one?
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How can I resolve distortion that sometimes appears in charts
created with the Chart Wizard?
To read more, see
http://www.weibull.com/hotwire/issue23/tooltips23.htm
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Hot News |
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BlockSim 6 Pre-Release Special
- We want to say a special thanks to those who have already
taken advantage of the pre-release special. We are still
on track to release this software in February 2003. If you
have not purchased a license yet, please note that when
you order BlockSim 6 before the official product release,
you will receive a $500 discount off of the standard
price! Special pre-release prices are only $1995 for
new users and $495 to upgrade from BlockSim 1.0/1.5. For
more information about this ultimate system visualization
and analysis tool, please visit
http://BlockSim.ReliaSoft.com.
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ReliaSoft at RAMS
- ReliaSoft will be participating in the 49th Annual
Reliability and Maintainability Symposium (RAMS), to
be held January 27 - 30, 2003 in Tampa, Florida.
ReliaSoft will have a booth in the vendors area where you
can get information and demonstrations of ReliaSoft's products
and services. We hope to see you there! For detailed information
on the symposium, please visit
http://www.rams.org.
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New Distributor in China
- ReliaSoft has recently appointed Sinosome Co. Ltd as a
distributor for Mainland China.
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Reliability Training Seminars
- Upcoming ReliaSoft public reliability training seminars
include:
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Master the Subject, Master the Tools
training seminar for life data analysis, accelerated
life data analysis and system reliability analysis:
February 24 - 28, 2003 in Tucson,
Arizona. For more information, see
http://www.ReliaSoft.com/seminars/master.htm.
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Reliability
Black Belt series is designed for advanced
instruction pertaining to specific areas of
discipline. For more information, see
http://www.reliasoft.com/seminars/.
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- Repairable Systems Analysis
and BlockSim (Advanced) -
March 24 - 26, 2003 in Tucson,
Arizona.
- Xfmea -
March 27 - 28, 2003 in Tucson,
Arizona.
- QALT Boot Camp
(Quantitative Accelerated Life Testing
Data Analysis) - April 30 - May
2, 2003 in Tucson, Arizona.
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Contribute to HotWire
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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
2003 ReliaSoft Corporation,
ALL RIGHTS RESERVED
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