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| In this
issue: |
Issue
23, January 2003 |
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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. You can
contact Sinosome Co. Ltd at:
Sinosome
Co. Ltd
Mr. Zhao Xiaolong
201# TongDa St.
DaoLi Dist.
Harbin
China 150076
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Phone:
86-451-4512255
Fax: 86-451-4512244
General E-Mail: Zhao@sinosome.com
Beijing Office E-Mail: Beijing@sinosome.com
Shanghai Office E-Mail: Shanghai@sinosome.com
WWW: www.chinarel.com |
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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/.
- 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. 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 © 2003 ReliaSoft
Corporation, ALL RIGHTS RESERVED
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