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SOFTWARE DESCRIPTIONS:
SuperSMITH(TM) Software Suite, SuperSMITH(TM) Weibull, SuperSMITH(TM) Visual, SuperSMITH(TM) YBath(TM)
PUBLICATION DESCRIPTIONS:
The New Weibull Handbook(c), PlayTIME(TM) with SuperSMITH(TM), New Weibull Methods + Video


Accelerated
testing generally consists of increasing some or all of the stresses that
control the length of product life. This is done to produce the same or similar
results as the lower stresses that normally occur, but with shorter overall
test times and lower cost. It often is very difficult to increase the stresses
without also changing the physics of failure. Even after a successful
accelerated test (no significant failure mechanism change) the life data from
higher loading still must be correlated to life at normal load. Dr. Wayne Nelson, a
leading authority on accelerated testing, refers to many such techniques in his
Accelerated Testing book. One source for accelerated testing
analysis is SuperSMITH(TM) Weibull software. Weibull life curves for
the product, at different stress levels, can be easily estimated based upon
test results. Then the shorter characteristic lifetime, found at higher stress
in the laboratory, is lengthened to actual service lifetime using this model.
No more fudge factors!
SuperSMITH (TM) is the leading Weibull analysis
software. Ours is the accepted metric analysis standard for the automotive
industry, the medical industry, the power generation industry, the hydrocarbon
processing industry, the railroad industry, the aerospace industry, the
computer industry, the communications industry and many other industries and organizations
including the U.S. military and the Federal Aviation Administration. Classic
case studies out of standard textbooks provide ideal benchmarks for our
software calibration. Our thousands of customers demand this high standard.
Such case studies might typically include analysis of aircraft components after
inflight shutdowns, comparison of new and old medical remedies, and
performance of electrical insulation in power transmission. SuperSMITH (TM)
Weibull software includes several
benchmarks ready to use for comparison and validation. The supplied data values
are easily copied for use in other software. Full instructions are given for
interpretation. Find out if you are using the best software. Can the software
you use measure up? Try the benchmark data and see.
The
latest edition of The New Weibull Handbook by Dr. Robert Abernethy contains
standard procedures for performing Weibull analyses. Bestpractice methods are
specified for different data analysis situations. Does your reliability effort
produce the most costefficient results and the most accurate results? Maybe
you should be using standard procedures to minimize the work required for the
maximum output. Join the thousands of companies that have chosen The New Weibull Handbook as the standard metric analysis method for their reliability
programs.
Does
your software give you the most for your time and effort? Is it performing at
the highest industry expectations? A conscientious analyst can be selective
with all of the analytical methods available for the computer. There are many
complex equations thrown into software (copied directly from a textbook) that
are practically unusable, or worse, misleading. This technical clutter can be
confusing or maybe even misleading. We recommend picking out a few good tools
to keep handy that have proven worthwhile. The
New Weibull Handbook written by Dr. Bob Abernethy
is the world standard reference for Weibull analysis and provides the select
few bestpractice methods. This handbook cuts through the clutter with a
handful of solid techniques. SuperSMITH
(TM) is the only software that is 100% capable of these bestpractice
techniques. It is the only Weibull software widely recognized as the world
standard.
Yes/no,
on/off, good/bad, pass/fail all can be binomial situations. The simple classic
formula for the binomial distribution was discovered in 1663 by John Newton (Is
he any relation to Sir Isaac?). If you know the proportion of the time that
each of the two outcomes are expected and you know how many samplings
are to be made, you are home free. This most basic of all distributions is used
extensively in quality control applications and in gambling. Another basic
distribution is the Poisson distribution for rare events in a continuum. The
Poisson is often used as an approximation for binomial when the values are
within appropriate limits. Read more about these related methods in The New Weibull Handbook by Dr. Bob Abernethy.
Bvalue
is the shorthand for percentile in the world of Weibull. The bearing
industry uses it as a barometer for rated length of service. For example, B10
life represents the length of service time allowable with approximately 10
percent expected to fail. B5 life for the same part would be some reduced
service time with only 5 percent expected to fail. These values are provided in
SuperSMITH(TM) Weibull,
by entering the data and looking at the graph. It's easy to get precise
readings with the predict button in the software.
Dr. Robert Abernethy is known worldwide for his Weibull
workshops presented in Australia, China, Japan, Sweden, Israel, Great Britain,
Canada and the USA. Retired from Pratt & Whitney Aircraft, he has numerous
awards from SAE, ASME, AIAA, and ISA for his development of advanced Weibull
technology during the last thirty years including the Weibayes
method, failure forecasting and the Weibull substantiation test designs. He is
a fellow of ASQ, SAE and the Royal Statistical Society, and an associate fellow
of AIAA. He received the ASME 1988 Gold Medal the SAE 2001 McFarland award for
contributions to Weibull education. He founded and chaired SAE's G11 Committee
on Reliability and Maintainability. The patent on the J58 engine that powers
the world's fastest airplane, the SR71 Blackbird, is in his name, as well as
the patent on the afterburner control on the F100 engine in the F15 and F16
fighters. He was a Navy Scholar as well as a Fulbright Scholar to Great
Britain. He is the principal author of the original USAF Weibull Analysis
Handbook and the sole author of The
New Weibull Handbook. He has
presented his course, the Weibull/Lognormal Analysis Workshop, all over the
world and continues to teach and provide consultation on Weibull related
methods.
Wes Fulton is founder/CEO of Fulton Findings(TM) and
the creator of all of the Fulton Findings 'SMITH software
including WeibullSMITH, Visual*SMITH, MonteCarloSMITH, BiWeibullSMITH, SuperSMITH(TM) Weibull, SuperSMITH
Visual and the SuperSMITH package. He has 16 years of
experience as program engineer for Garrett AiResearch
(product line ownership changed several times, first to AlliedSignal and then
later to Moog). He supervised development and production engineering of
aircraft flight control projects, especially maneuvering flybywire actuation
systems. He supervised the successful Indigenous Defensive Fighter (IDF) wing
leading edge flap actuation system from development through completion of
production and also developed the IDF turbine engine flowcompensated fuel
bypass. He was program engineer for the F16 leading edge flap production
program and the X31A leading edge flap program. He copatented the multifuseable shaft (a highperformance drive train device) and
is a member of ASME, IEEE, and SAE. He originated the Fulton Factor used in set
comparison, invented the concept of equivalent probability and confidence known
as assurance, and developed probabilistic S/N curve analysis. He teaches
seminars in Weibull analysis for organizations such as SAE and ASME.
E. J. Gumbel
in the 1920's was the first to seriously investigate extreme values, such as
the 100year flood level. He found that there were only six separate extreme
value distributions (proven by Gnedenko) and went on
to complete a book, Statistics of
Extremes, published in 1958. It
is now the standard reference. The TypeIIIsmallest extreme value distribution
is the Weibull distribution. Waloddi Weibull independently
invented and used this distribution, and later acknowledged E. J. Gumbel's
contributions to extreme value research by using his plotting paper.
Waloddi Weibull was a Swedish engineer and mathematician. He invented the
distribution that now carries his name in 1937 and delivered his first American
paper on the subject in 1951. He also wrote a treatise on fatigue testing, Fatigue Testing and Analysis of Results, which centered on the uses of this
distribution. History has shown that his techniques are extremely useful. They
have become the leading methods in the world for analyzing lifetime data. Click
here
to see a very detailed biography of Waloddi Weibull.
NOTE:
See the contents page for schedules and locations of public sessions.
Dr. Robert Abernethy (Dr. Bob) developed the Weibull/LogNormal Analysis course over ten years ago, teaching
the applications and techniques of Weibull analysis. Dr. Bob has taught this
course hundreds of times for engineering/trade society conventions and onsite
for business and government with continuous improvements for new research. Wes Fulton
is the instructor approximately half of the time now. On rare occasions both
instructors participate in the same seminar. It can be the best introduction to
Weibull for the novice as well as a solid refresher course for the experienced.
It comes in 2day, 3day and 4day formats. Sample topics are:
Day
1: Overview, 23minute
Video, First Weibull, Good Weibulls, Bad Weibulls, Predicting Failures with/without Renewals, Case
Studies, Customer Usage, Maintenance Planning, Goodness of Fit with Critical
Correlation Coefficients, Weibull Experiments, Classwork Problems and
Solutions.
Day
2: WeiBayes,
Improving Accuracy, Smaller Samples, Substantiation Tests, Problem Resolution,
Zerofailure Testing, Zeroonefailure Testing, Sudden Death Testing, Warranty
Analysis, Maximum Likelihood, Rank Regression vs. Maximum Likelihood, Extremely
Small Samples, Inspection Data, Suspensions/Samplesize Effects on Uncertainty,
Experiment Analysis, Leastcost Replacement, Handson Computer Use, Analysis of
Studentsupplied Data.
Day
3: Confidence Intervals,
Design Comparison, Monte Carlo Solutions, Binomial, Poisson, Exponential,
DuaneAMSAA Reliability Growth, KaplanMeier Survivability, System Analysis,
More Handson Computer Use.
Day
4: History of Monte
Carlo, Examples, Random Numbers, System Simulation with Renewal, Case Studies,
Handson Computer Simulation, Reliability and Maintainability with Raptor and Monten, Free Copies of Simulation Software.
Note: A
separate two day refresher course includes review of risk analysis
through to the latest Weibull technology recently implemented in software.
Lecturers:
Either Dr. Bob Abernethy or Wes Fulton will lead the seminar. On occasion, both
will participate.
Please
contact Dr. Bob or Wes Fulton as
indicated in the Email Addresses, Sites and
Telephone #'s section.
Confidence  Useful confidence methods include:
Before
putting your faith in published analysis results, be sure to find out how
confidence is calculated. According to The
New Weibull Handbook by Dr. Bob Abernethy
the best practice for small samples (around 10 or less) is MONTE CARLO SIMULATION
based upon a pivotal statistic (pv method) as it is
automated in SuperSMITH(TM) Weibull. The best practice for larger
samples using the maximum likelihood fit method especially with a quantity of
suspensions is LIKELIHOOD RATIO confidence. Likelihood ratio was first
made available for PC's in SuperSMITH
Weibull. Best practice for larger samples using the least squares fit method
and few suspensions is Fisher matrix. Fisher matrix was first made available
for PC's in SuperSMITH. Binomial bounds are best for probit
analysis. Greenwood's bounds are best for KaplanMeier (also available first in
SuperSMITH. Many of these techniques are not
available elsewhere as of this writing.
Carl Tarum and Wes Fulton are
available as schedule allows for consulting on life data, reliability and
maintenance concerns. Dr. Abernethy, the principle author of the original U.S.
Air Force Weibull Handbook, has over 40 years of experience as one of the
leading Weibull experts in the world. Wes Fulton, who released the first useful
PC Weibull plotting software over 10 years ago, is a pioneer in the development
of userfriendly technical software and he is the CEO of Fulton Findings ^{TM}.
Both are degreed engineers with many years of experience in actual application
of these techniques, and both now teach Dr. Abernethy's threeday course on
Weibull. They can be reached at the numbers given in Email Addresses, Sites and Telephone #'s. NOTE: Dr. Bob prefers that Wes consult
for northern clients in winter, except whenever the client is in Sweden. See a
pattern?
Are you
talking only the language of engineers and statisticians? Or can you speak the
universal language of business, so the people holding the checkbook understand?
When it comes time to renew the annual budget or buy capital equipment for
manufacture, then it helps to speak as clearly as possible. You can benefit by
thinking and communicating in terms of money. If you do, you will be noticed
and your priorities might go directly to the top of the agenda. How? Ask
Paul Barringer of
Barringer and Associates. From what we have seen, he communicates pretty well
for an engineer. One of the techniques promoted by Dr. Bob Abernethy
and Mr. Barringer is determination of the lowestcost planned replacement
interval. The optimum replacement interval, or best allowed time of service
before equipment is retired and new equipment is substituted, is the one with
the smallest cost per unit time. Another way to reduce cost is by using sudden
death WeiBayes testing as described in The New Weibull Handbook. These techniques are automated in SuperSMITH(TM) Weibull
software and provide an excellent icebreaker for an executive boardroom
discussion. But whatever you do in a boardroom, do not confess any technical
ability. We do not want anybody getting hurt.
Critical
Correlation Coefficient (CCC) and Distribution Analysis
Dr. Bob Abernethy has developed critical values of the
correlation coefficient for the Weibull distribution based upon simulations
performed by Carl Tarum using Monte Carlo simulation. Goodness of fit tests have been greatly
simplified and have become easier to understand. Use of the CCC is best
practice for determining the most appropriate distribution for a set of data
from statistics. Certainly CCC must also be used in conjunction with results from
investigation into root cause of failure to complete the analysis. These values
are automatically included in SuperSMITH(TM) Weibull distribution analysis and in the
reporting.
Comparing
designs is easy with SuperSMITH(TM) Weibull. It automates the use of
likelihood ratio and provides the amount of difference between different sets
of data. Comparison is not limited to two sets. This technique is useful for
comparing new design to old design, supplier A against supplier B, and
application C vs. application D vs. application E, etc. You can also use
techniques such as likelihood contour comparison and graphical comparison as
requirements dictate. Let The New Weibull
Handbook be your guide to
selecting the appropriate design comparison method.
* Abernethy,
Robert B., The New Weibull Handbook (NWH), selfpublished, 1997. This is
the world standard reference for Weibull analysis techniques. The NWH replaces
the original Air Force Weibull Handbook also written by Dr. Bob Abernethy, one
of the leading authorities on Weibull analysis. It contains step by step
instructions for performing a Weibull analysis and related techniques such as
forecasting failure quantity expected, WeiBayes
comparison, substantiation test planning, least cost replacement interval, and
related techniques, with several case studies for each method included. You can
order this from Dr. Bob Abernethy or Wes Fulton or Paul Barringer as indicated
in Email Addresses, Sites and Telephone #'s. Price and availability is given on the Main Page.
*
Abernethy, Robert B., New Weibull Methods + Video, selfpublished, 2003. Seven
case studies in a Powerpoint presentation, explained
in detail with an included Word document, plus a 22 minute video showing 3 more
case studies. You can order this from Dr. Bob Abernethy or Wes Fulton or Paul
Barringer as indicated in Email Addresses,
Sites and Telephone #'s. Price
and availability is given on the Main Page.
*
Fulton, Wes, PlayTIME(TM) with SuperSMITH(TM),
selfpublished, 2003. This is the computer tutorial for the Fulton Findings(TM)
software. You can order this from Dr. Bob Abernethy or Wes Fulton or Paul
Barringer as indicated in Email Addresses,
Sites and Telephone #'s. Price
and availability is given on the Main Page.
*
Gumbel, E. J., Statistics of Extremes, Columbia University Press, New
York, 1958.
* Liu,
ChiChao, A Comparison Between the Weibull and Lognormal Models Used to Analyse Reliability Data, University of Nottingham
Doctoral Thesis, 1997.
*
Nelson, Wayne, Accelerated Testing, John Wiley & Sons, New York,
1990. The world standard reference on accelerated testing. This is an excellent
sourcebook for life data analysis. There are many new techniques in this volume
to complement his other standard references on life data analysis. Contact Dr.
Wayne Nelson as indicated in Email Addresses,
Sites and Telephone #'s if you
are interested.
*
Weibull, Waloddi, Fatigue Testing and Analysis of
Results, Pergammon, New York, 1961.
Languages
and International Use
Version
2.0 and above of all Fulton Findings^{TM}
Windows software includes simple language translation capability. Please
contact Wes Fulton as
indicated in Email Addresses, Sites and
Telephone #'s, if you want to
have the program translated into another language. New language files will be
added to the distributed software, as they become available. A character or a
brief character combination can be selected to specify currency. Also, Version
2.0 and above recognizes the selection of decimal symbol (either period or
comma) made in the Control Panel setup in Windows. These new features were
added by request from our customers overseas. Version 4.0D and above of the
software allows for input of a new additional language file that has the name
SSLNGLNG.TXT. If languages are not already provided, then a translated version
of the English text file can be renamed to SSLNGLNG.TXT and then input as an
Additional Language as described below. Italian is new for version 4.0D and
must be downloaded (however after download it should appear as the Italiano selection in the menu).
GET A
LANGUAGE FILE HERE. THE FOLLOWING FILES ARE TEXT FILES AND CAN BE EASILY COPIED
AND SAVED TO A TEXT (WITH LINE BREAKS) FILE IN THE SAME SUBDIRECTORY WITH THE
PROGRAM FILES.
French  Francais
German  Deutsch
Swedish  Svenska
Spanish  Espanol
Dutch  Nederlands
Portuguese (Brazilian)  Portugues
Italian  Italiano
After
you download or copy the language text file, make sure it is in the same
subdirectory with the other program files such as SMITH.INI, SMITHW.EXE, etc.
Then run the software program and select the Setup icon (showing a computer)
from the main screen. Select the Language / Currency / Decimal / Time / Date
icon (showing two people talking) and then select L (for Language) from that
menu to get the language menu. You should see the language file just downloaded
listed in the menu, unless it is a new additional language file. For additional
language files, the file name must be copied to a file named SSLNGLNG.TXT first
and then selected from the language menu as Z...Additional Language.
The
likelihood ratio method for confidence was made accessible by Fulton Findings ^{TM}
in 1990 and is still not available elsewhere for easy use on a PC as of
this writing. Since that time, the likelihood ratio technique has been expanded
in Fulton Findings software to compare designs for significant difference based
upon exclusive research conducted by Wes Fulton and Dr. Bob Abernethy. SuperSMITH(TM) Weibull
appears to be the only easily accessible and widely used personal computer
software using it for confidence. Many other uses of this technique are
projected. With proper compensation for small sample bias, it is the best
practice available for comparison of groups of data.
Several
data formats and associated methods of analysis are available. They include
rank regression, maximum likelihood, probit,
KaplanMeier, etc. Each technique has benefits for certain data formats. For
example, inspections produce data different than tests where precise failure
times are known. This is similar to coarse readout data from imprecise
instrumentation. Grouped data can be handled effectively with either probit or KaplanMeier. Rank regression has benefits for
smaller sample size and maximum likelihood is suggested for data with many
suspended values. There are other issues associated with plotting methods and
interval data. The New Weibull Handbook is the best source of information
regarding these different methods and their application. SuperSMITH(TM) Weibull
provides all of these techniques that are best practice based upon the
particular data format.
Sometimes
the data collection is less than perfect. Different failure mechanisms can be
mixed together. The mixed distribution model is covered in The New Weibull Handbook ^{TM} (NWH). One technique is to analyze for
competing risk. SuperSMITH(TM) Weibull (SSW) searches for a competing
risk solution from two possible mechanisms (two Weibulls
or two Normals or two Lognormals, etc.) by evaluating
ordered combinations. Pvalue technology is found to indicate the power of the
mixed distribution model. If the power is very low, SSW indicates a small
probability of mixture. Otherwise the pvalue is given along with the four
parameter solution. This level of competing risk mixture analysis is not
available elsewhere. YBath(TM) software programmed by Carl Tarum
and now owned by Fulton Findings(TM) provides additional analysis of more
complex situations including partial populations and competing risk.
Beware
of amateur software from other sources with unsubstantiated mixture analysis
methods. Bad software provides solutions even without reasonable supporting
evidence. You must always take care with mixture analysis, since false
indication of mixture for nonmixed data is common. This can be easily tested.
Feed the suspect software several random samples from a single distribution and
determine the frequency you obtain mixture solutions. If a high proportion of
mixture solutions (high pvalues if given) are provided for the single
distribution samples, then the software is not very good. The best procedure is
to perform careful analysis of mechanism root cause to avoid mixing altogether.
Refer to NWH for more details.
Monte
Carlo Simulation and Confidence
Monte
Carlo (mc) is a special technique for simulation made possible with fast
computers. It is used as a prediction tool and can provide a reference for
analytical techniques. The pivotal (pv) confidence
method is based upon generating and processing large quantities of random
variates. SuperSMITH(TM) Weibull software uses the power of Monte Carlo to
generate correlation PValue and confidence limits for Blives and parameters
such as Beta and Eta. Distribution of the correlation coefficient and t0 (third
parameter in Weibull) for research purposes can be investigated with MonteCarloSMITH^{ TM}. SuperSMITH(TM) Weibull pv confidence should be used for small samples (around 10
or less) instead of analytical techniques. The 4^{th} day in Dr.
Abernethy's 4day Weibull/LogNormal
Analysis Seminar is devoted to
mc simulation. For more information, please contact Dr. Bob Abernethy or Wes
Fulton as indicated in Email Addresses, Sites
and Telephone #'s.
Probabilistic
analysis is just what the doctor ordered for new designs. The previous method
of using safety margins and safety factors is not good enough any more. Reducing the chance of failure is the real
challenge. That means you need to measure the probability of the applied stress
being larger than the strength for each load application. If you can estimate
the distribution of stress and the distribution of load, then SuperSMITH(TM) Weibull
can estimate the probability of failure within your needed accuracy. This very
flexible and powerful technique can also be applied to life distribution vs.
usage distribution with similar results.
For
software questions contact Wes Fulton at Fulton Findings and for Weibull
analysis questions contact Dr. Bob Abernethy as indicated in Email Addresses, Sites and Telephone #'s section. All software and handbooks are
guaranteed for customer satisfaction. Most questions are resolved with one
call. Any suggestions for software or handbook enhancement are welcome.
Probability
of success is the definition of reliability. A reliable product intelligently maintained
will provide adequate service life and garner high marks for customer
satisfaction. An unreliable product without proper maintenance is a disaster.
Scheduled maintenance can be costly and should only be considered for wearout failure mechanisms when older parts are more
likely to fail (increasing instantaneous failure rate). Weibull analysis can
indicate whether older parts or newer parts are more likely to fail. For
electronics, generally newer parts are more likely to fail at least during normal
usage (decreasing instantaneous failure rate). This type of failure mechanism
common in electronics is called infant mortality due to the higher
probability of failure at the start of service life. Constant failure rate
indicates the exponential distribution. Maintenance for infant mortality
and exponential failure mechanisms is wasteful. A better approach is to apply
some sort of screening just before actual usage. Certainly, this is why we feel
better after the computer store has burnedin our new computer for a few hours
before we take delivery. SuperSMITH(TM) Weibull software provides useful
estimates of failure mechanism type, the predicted number of failures to
expect, the lowestcost replacement strategy, spares requirements, and
assessments of corrective action effectiveness. Also, reliability/maintainability/availability software from Paul
Barringer of Barringer & Associates can help to solve complex problems in this
area.
Reliability
Growth (Crow/AMSAA based upon J.T. Duane's postulate)
A
technique related to Weibull analysis for evaluating failure occurrence is
called reliability growth modeling. It requires less information than Weibull
requires, but it still can indicate instantaneous failure rate changes. Of 27
different competing reliability growth models, Crow/AMSAA has been found to be
best practice. Dr. Larry Crow took J. T. Duane's postulate for learning curve
modeling and extended the analysis with powerful statistical capabilities. It
is included as a part of SuperSMITH(TM) Visual software. There is no need for a
separate program, since this technique simply consists of plotting a straight
line on a loglog plot. Predicting the quantity of failures to expect for
spares ordering and maintainability planning is very easy. The New Weibull Handbook has a complete section devoted to Crow/AMSAA.
Risk Analysis (Expected Quantity Forecast)
Estimating the expected quantity of occurrences or failures in the coming months is called risk analysis. Chapter 4 in The New Weibull Handbook covers this type of estimating. It is extremely useful for identifying a batch problem or for determining spares purchase policy. It was developed and used effectively by Dr. Abernethy years ago in response to customer information requirements. Risk analysis is automated in SuperSMITH(TM) Weibull software and is not available elsewhere as of this writing for easy use on a PC.
Be
careful. We recommend checking all potential software out with a set of benchmarks from
standard textbooks. Our software meets the benchmarks and often betters them.
We have copied the benchmarks for you and they are easily accessible from our
Windows software. Please contact us if you want to use the benchmarks for
comparison. If possible, try the benchmarks on software you might buy before
actual purchase to see if the software measures up. You may be surprised to
find out how disappointing some software can be. You will not be disappointed
with our software. It is the world standard for performing Weibull analysis.
General
descriptions follow. Click here for the latest software version numbers
and revision information.
SuperSMITH (TM) is a bundled package of programs
from Fulton Findings^{TM} for reliability and
variability solutions on a personal computer at a discount price. It is a
complete selfstudy package with SuperSMITH(TM)
Weibull and SuperSMITH Visual
and SuperSMITH YBath(TM)
from Fulton Findings (TM), the PlayTIME
With SuperSMITH (TM) tutorial and The New Weibull Handbook (NWH) copyrighted 1997 by Dr.
Bob Abernethy. These friendly
standalone programs are also available separately to minimize cost. SuperSMITH performs all of the techniques covered in The
New Weibull Handbook. It is the standard for performing Weibull life data
analysis, and is used by thousands of companies worldwide. Recently published
benchmarks indicate SuperSMITH as the only
trustworthy source for best practice solutions to these kind of problems. You
can order this from Dr. Bob Abernethy or Wes Fulton or Paul Barringer as
indicated in Email Addresses, Sites and
Telephone #'s. Price and
availability is given on the Main Page.
SuperSMITH(TM) Weibull (SSW) software for Windows
performs all of the Weibull techniques in Dr. Abernethy's New Weibull Handbook.
SSW contains results of independent research with several methods developed by
Dr. Abernethy in cooperation with Fulton Findings. Many of these techniques are
not available elsewhere, such as likelihood ratio confidence, simplified
design (set) comparison, KaplanMeier simulation and solution, critical
correlation coefficient, suddendeath WeiBayes,
parameter as a function of engineering variable, etc. SuperSMITH
Weibull for Windows uses Weibull, Normal or LogNormal
equations. It replaces the DOS program WeibullSMITH^{TM}
and the Windows program SuperSMITH(TM) Weibull (SSW),
previously the leading Weibull analysis software programs. You can order this
from Dr. Bob Abernethy or Wes Fulton or Paul Barringer as indicated in Email Addresses, Sites and Telephone #'s. Price and availability is given on the Main Page.
SuperSMITH(TM) Visual (SSV) software for Windows
provides general scientific plotting. It includes Duane/AMSAA modeling for
reliability growth analysis and it plots probability density functions,
cumulative distribution functions (regular scaling), likelihood contours, leastcost
replacement intervals, failure forecasts, and histograms all from SuperSMITH^{TM} Weibull files. The likelihood
contour comparison capability is not available elsewhere. The program
also includes function plots, data transforms (global edit), and curve fitting
as well as XY plots, bar charts and pie graphs. You can order this from Dr. Bob
Abernethy or Wes Fulton or Paul Barringer as indicated in Email Addresses, Sites and Telephone #'s. Price and availability is given on the Main Page.
SuperSMITH(TM) YBath(TM)
for Windows  Contact Wes Fulton as indicated in Email
Addresses, Sites and Telephone #'s
for additional information on YBath bathtub curve
modeling for multiple and mixed failure mechanisms. Both rank regression and
maximum likelihood techniques are now available.
WeibullSMITH (WS) for DOS (no longer available) was
the first commercial PC implementation of Weibull analysis including plotting
and failure forecasting. It was replaced by SuperSMITH(TM) Weibull (SSW)
for Windows and finally SuperSMITH(TM) Weibull (SSW).
All previous capability plus a lot more is now in SSW.
VisualSMITH (VS) for DOS (no longer available) is the
precursor to SuperSMITH(TM) Visual (SSV) and finally SuperSMITH(TM)
Visual (SSV). All capability plus a lot more is now in SSV.
BiWeibullSMITH TM (BW) for DOS (available only from
archives) solves two fit lines for one set of data without partitioning. This
is useful for warranty analysis with both infant mortality and wearout failure mechanisms. The late Alan Townsend of
Allison Engines pioneered this BiWeibull solution
technique. This competing risk analysis capability is not available elsewhere
and has now been moved to SuperSMITH(TM) Weibull. Other software available for mixed population analyis is YBath(TM) from Fulton Findings. Contact us as designated in
Email Addresses, Sites and Telephone #'s section.
MonteCarloSMITH^{TM} (MC) for DOS (no longer available) is a
research tool available for general use. Regular Monte Carlo simulation and
Monte Carlo confidence is available in SuperSMITH(TM) Weibull. What makes MC special is its ability to
create, analyze and store the data from up to 1000 simulations (up to 1000000
for certain comparisons). This process provides Monte Carlo estimates of
confidence for probability model parameters such as the mean, standard
deviation and 95^{th} percentile of a normal distribution for example.
Weibull, Normal and LogNormal equations are provided.
These techniques, absolutely necessary to remove bias for small samples, are not
available elsewhere. The current MC software is already easy to run in
Windows, since graphics are not involved. Please contact Wes Fulton as
indicated in Email Addresses, Sites and Telephone #'s.
Weibull Analysis
for Variability Control (including Normal, Lognormal, Exponential, Gumbel lower
and Gumbel higher)