| In this issue: |
Issue 108,
February 2010 |
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Reliability HotWire is a service of
ReliaSoft Corporation
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Hot Topics |
Using the Chart Wizard to Create a Custom Plot
A wide variety of plots are built into the
Weibull++ software,
as well as the ability to combine
separate data sets on a single plot using
the MultiPlot. However, sometimes a
desired plot is not available. For example,
suppose that you want to plot component reliabilities
and the system reliability obtained from a reliability block
diagram
on a single plot. In Weibull++, you can
obtain the plot of the component reliability versus time
in the Standard Folio, and the plot of system
reliability versus time using the Diagram. You can then
create a custom plot that combines these plots. This article will show the steps to create
such a custom plot in Weibull++.To read more, see
http://www.weibull.com/hotwire/issue108/hottopics108.htm
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Reliability Basics |
Failure Rate of a Series System Using Weibull++
In many reliability prediction standards, systems are
assumed to have components described by exponential
distributions (i.e. constant failure rates)
arranged in series. The goal of these standards is to
determine the system failure rate, which is computed by
summation of the component failure rates. However, many
reliability engineers do not realize that for components
arranged reliability-wise in series, the system failure
rate at a given time is always equal to the sum of the
component failure rates at that time, regardless of the
distributions used to describe the components. This
article will provide the mathematical justification of
the preceding statement and show an example of two
methods of plotting the system failure rate function
using
Weibull++.
To read more, see
http://www.weibull.com/hotwire/issue108/relbasics108.htm
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Tool Tips |
- Is there an easier way to enter my license when
activating one of ReliaSoft’s software products?
- How can ReliaSoft help my organization configure
the XFRACAS system to meet our particular needs?
To read more, see
http://www.weibull.com/hotwire/issue108/tooltips108.htm
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Latest Software Updates |
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A new service release is now available for
Weibull++ (SR
7.5.9), ALTA (SR
7.5.9), DOE++ (SR
1.0.6),
Xfmea Standard
(SR 4.0.9),
Xfmea Enterprise (SR 4.0.9) and
RCM++ (SR 4.0.9).
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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RAMS 2010 -
Thanks to all of you who
visited our booth this year!
As in previous years,
interest in
Weibull++ and
Xfmea has remained
strong; we also noticed an
increased interest in
BlockSim. We were
especially honored to
receive the Stan Oftshun
Award for Best Paper by an
SRE Member for our
presentation,
"Reliability Estimation for
One-Shot Systems with Zero
Component Test Failures."
We also presented on
other topics including
"Piecewise NHPP Models with
Maximum Likelihood
Estimation for Repairable
Systems," "Best Practices
for Effective Reliability
Program Plans" and
"Temperature Acceleration
Models in Reliability
Predictions: Justification &
Improvements." These papers
are now available for
download from
http://www.weibull.com/knowledge/papers.htm.
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Expanded FMEA
Training - You
asked for more help with practical FMEA
facilitation and we listened. Starting in
March, we will be offering the new Effective FMEA
Series. This is a 5-day series that
consists of two courses. RS 470 provides the
foundations for effective FMEAs and RS 471 uses
case study examples to allow attendees to practice
FMEA facilitation and application skills.
ReliaSoft Xfmea
software is used for data management and reporting.
Although these courses can be taken separately, we
recommend taking them together since RS 471 builds
upon the material presented in RS 470.
For
those who have taken RS 470 previously in the 2-day
format, the course content has been expanded
considerably to include more examples and case
studies and more information on related analyses (e.g.
Process Flow Diagrams, DRBFM). It also provides
participants with a better understanding of how FMEA
fits into the overall reliability program and
addresses key factors for creating an effective FMEA
process. If your goal is to increase your
knowledge and understanding of FMEA, then it is
well worth the investment of time and money to
re-take this course. For more information on the
Effective FMEA Series, please visit
http://www.ReliaSoft.com/seminars/effective_fmea.htm. |
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Upcoming
Public Training Event Calendar |
|
February 2010 |
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February 22 - 26, 2010:
MSMT Foundations
in
Tucson, AZ |
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March
2010 |
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March 1 - 3, 2010:
RS 522 Advanced System
Reliability / Maintainability
Analysis
in
Berlin, Germany |
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March 4 - 5, 2010:
RS 490 Standards Based
Reliability Prediction
in
Berlin, Germany |
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March 15 - 19, 2010:
Effective FMEA Series (RS 470 &
RS 471)
in
Tucson, Arizona |
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March 15 - 19, 2010:
MSMT Foundations
in
Kuala Lumpur, Malaysia |
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March 15 - 17, 2010:
RS 401(C) and RS 402 Life Data
Analysis (Condensed) and Intro
to Accelerated Testing
in
Pune, India |
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March 16 - 18, 2010:
RS 522 Advanced System
Reliability / Maintainability
Analysis
in
Tucson, Arizona |
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March 22 - 23, 2010:
RS 490 Standards Based
Reliability Prediction
in
Singapore |
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March 24 - 26, 2010:
RS 522 Advanced System
Reliability / Maintainability
Analysis
in
Singapore |
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April
2010 |
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April 5 - 9, 2010:
RS 540 Reliability and
Maintainability Analysis for
Repairable Systems
in
Jakarta, Indonesia |
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April 7 - 9, 2010:
International Applied
Reliability Symposium
in
Berlin, Germany |
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April 19 - 21, 2010:
RS 521 Advanced Accelerated Life
Testing Analysis
in
Bangalore, India |
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April 19 - 23, 2010:
MSMT Foundations
in
Stockport, United Kingdom |
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April 19 - 23, 2010:
MSMT Foundations
in
Tucson, Arizona |
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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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Copyright © 2010 ReliaSoft
Corporation, ALL RIGHTS RESERVED. |
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