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In this issue: |
Issue 23, January 2003 |
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Reliability HotWire is a service
of ReliaSoft Corporation
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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/.
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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. 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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