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Topic: Design of experiments


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  Design of Experiments
When understanding your design space is important, a HEEDS DOE study is often the ideal approach to extract a great deal of useful information with as little computational or experimental effort as possible.
In a CAE-based DOE study, your CAE model is evaluated multiple times with the design variables set to different values in each run.
DOE studies based on physical experiments are performed in a similar manner, except that a physical experiment replaces each CAE run.
www.redcedartech.com /heeds/design_experiments.html   (315 words)

  
 DOE Software: STATISTICA Design of Experiments Software by StatSoft
The options for analyzing all factorial, response surface, and mixture designs are general in nature, can handle unbalanced and incomplete designs, and give the user full control of the choice of models to be fitted to the data.
The fractional design generators and block generators of the design, as well as the matrix of aliases of main effects and interactions can also be reviewed.
In addition to the standard options available for all designs (adding runs, randomization, replications, factor highs and lows, etc.; refer to the description of 2**(k-p) designs) the user has the choice of star-points that are face-centered, or computed for rotatability, orthogonality, or both.
www.statsoft.com /products/doe.html   (3484 words)

  
 Welcome to Design of Experiments
It also provides sample size estimates for t-tests, the minimum number of trials required for designed experiments, and the sample size and maximum allowable rejects for reliability studies.
STATISTICA 7 with the DOE module is a powerful, user friendly software for all your Design of Experiments work.
See the slides for Bill Kappele's talk, "Using Design of Experiments for Competitive Advantage," presented at the APICS Meeting in Bellingham, WA, Nov. 14.
www.objectivedoe.com /software.php   (317 words)

  
  Design of Experiments
Before an experiment can be conducted, the experimental design must be carefully planned to ensure that experimental objectives can be accomplished, assumptions required for hypotheses testing and data analysis are valid, randomization requirements are met, and the experiment is reproducible.
Specifically, experimental design has to do with the precise way different treatments (control factors) are administered to experimental units (subjects, parts, etc.) and what information is to be collected on the experimental units and other conditions that might affect the experimental units.
Some designs attempt to maximize information from an experiment with as few experimental units as possible, which can be important when the units are expensive or the experiment is time-consuming per unit.
reliability.sandia.gov /Manuf_Statistics/Design_of_Experiments/design_of_experiments.html   (772 words)

  
  Highbeam Encyclopedia - Search Results for Design of experiments
He is recognized as the founder of aerodynamics on the basis of his pioneering experiments and studies of the principles of flight.
The development of modern aircraft has led to many experiments in the aerodynamic problems of parachute design, with the result that the parachute of today is a highly efficient...
DOE requires careful planning: here are four common mistakes researchers make when using the design of experiments approach.
www.encyclopedia.com /SearchResults.aspx?Q=Design+of+experiments   (797 words)

  
  ROBUST PRODUCT DESIGN THROUGH DESIGN OF EXPERIMENTS
This efficient design of experiments is based on a fractional factorial experiment which allows an experiment to be conducted with only a fraction of all the possible experimental combinations of parameter values.
The design parameters or factors of concern are identified in an inner array or design factor matrix which specifies the factor level or design parameter test cases.
Very simply, a design factor with a large difference in the signal noise ratio from one factor setting to another indicates that the factor or design parameter is a significant contributor to the achievement of the performance characteristic.
www.npd-solutions.com /robust.html   (1251 words)

  
 Design of Experiments (Statistics Toolbox)
Suitable designs for this experiment include the central composite designs and Box-Behnken designs, described in the previous two sections, and the D-optimal designs, described in D-Optimal Designs.
This part of the experiment compares the results obtained using data gathered through trial and error and using data from a designed experiment.
Using the data from the designed experiment, you are more likely to be able to find levels for the reactants that result in the maximum reaction rate.
www.mathworks.com /access/helpdesk_r13/help/toolbox/stats/doe8.html   (867 words)

  
 Biometrika: Design of experiments
An incomplete-block design with all blocks of the same size and with one control treatment is defined to have supplemented balance if all non-control treatments have the same replication and have the same concurrence with the control, and if all pairs of non-control treatments have the same concurrence.
Atkinson: The design of experiments to estimate the slope of a response surface.
Designs for three factors such that each pair are either orthogonal or a BIBD and treatments (one of the three) have total balance with respect to the other two.
www.maths.qmul.ac.uk /~rab/biometrika.html   (10837 words)

  
 Design of Experiments: An Overview and Application Example (MDDI archive, Mar 96)
A strategy for planning research known as design of experiments (DOE) was first introduced in the early 1920s when a scientist at a small agricultural research station in England, Sir Ronald Fisher, showed how one could conduct valid experiments in the presence of many naturally fluctuating conditions such as temperature, soil condition, and rainfall.
Using a factorial design for the blood coagulation example, as shown in Figure 2, running a test with both variables at their high level yielded a rate of 60, not 41 as previously estimated.
A factorial design makes it possible not only to determine the main effects of each variable, but also to estimate the interaction (i.e., synergistic effect) between the two factors, a calculation that is impossible with the one- factor-at-a-time experiment design.
www.devicelink.com /mddi/archive/96/03/011.html   (2751 words)

  
 Design of Experiments
Design of Experiments (DOE) is powerful statistical tool for solving complex problems.
            Statistical design of experiments is being used by a number of companies to optimize their designs or processes.
The goal was to introduce you to the field of Design of Experiments and to convince you that it has value for engineers and scientists.
www.rose-hulman.edu /~stienstr/me421/DOE2001.htm   (2791 words)

  
 Statistics Glossary - Design of Experiments & ANOVA
The structure of the experiment in a completely randomised design is assumed to be such that the treatments are allocated to the experimental units completely at random.
The randomised complete block design is a design in which the subjects are matched according to a variable which the experimenter wishes to control.
Using a randomised blocks design, the subjects are assessed and put in blocks of four according to how severe their skin condition is; the four most severe cases are the first block, the next four most severe cases are the second block, and so on to the twentieth block.
www.cas.lancs.ac.uk /glossary_v1.1/dexanova.html   (1230 words)

  
 Design Of Experiments For Six Sigma -- iSnare.com Articles
Design of Experiment (DOE) is a structured technique that helps to uncover relationships often hidden inside mountains of data.
Design of Experiments is a formal statistical methods required to ensure that the testing or piloting of any new improvement ideas maximize the informational potential of the trial and ultimately the return to the business.
Design of Experiments is an organized method for determining the relationships between factors that affect a process and the variable outputs of that process.
www.isnare.com /?aid=20897&ca=Business+Management   (1066 words)

  
 Design of Experiments
The designs involve at least 3 levels of the experimental factors.
Mixture - designs involving components of a mixture, where the levels of the components are constrained to sum to 100% (or some other fixed value).
Inner/Outer Arrays - designs consisting of both controllable and uncontrollable (noise) factors, intended to find combinations of the controllable factors at which the responses are relatively insensitive to the uncontrollable factors.
www.statgraphics.com /design_of_experiments.htm   (500 words)

  
 (Design of Experiments) Design of Experiments for Process Validation (MDDI archive, Jan 99)
Analysis of the DOE with a commercially available statistics package revealed that user perceptions resulted in significant results, which means that the paraffin formula did not pass the ruggedness test.
Regarding the perception of the quality of the wax glove, the first experiment seemed to indicate some effects, but after the data were reviewed for the entire series of runs, including the foldover, none of the factors was shown to significantly affect user perceptions (Figure 7).
DOE is just one of the statistical tools used in validation to challenge a system and identify which factors to control.
www.devicelink.com /mddi/archive/99/01/018.html   (2004 words)

  
 Qi2 | Design of Experiments
Design of Experiments (DOE) has provided documented substantial savings to thousands of companies by solving difficult quality problems, reducing product and process variation, and optimizing product/process performance and consistency.
DOE is a very powerful analytical method that can be taught to technical professionals at a very practical level, providing a cost-effective and organized approach to conducting industrial experiments:
Due to the statistical balance of the designs, thousands of potential combinations of numerous variables (at different settings or levels) can be evaluated for the best overall combination, in a very small number of experiments.
www.qualityi2.com /doe.htm   (228 words)

  
 Statistical Design of Experiments   (Site not responding. Last check: )
Designed experiments (DOE) can be classified as another tool, or set of tools, to be used for gathering test data.
DOE eliminates the ‘confounding of effects’ whereby the effects of design variables are mixed up.
DOE helps us find the unimportant variables that may not need to be controlled.
www.doesinc.com /knowledge.htm   (1468 words)

  
 Design of Experiments :: Overview from The Quality Portal
DOE is a systematic approach to investigation of a system or process.
In each case, DOE is used to find the answer, the only thing that marks them different is which factors would be used in the experiment.
design, manufacturing, statistics etc.) should be involved when identifying factors and levels and developing the matrix as this is the most skilled part.
www.thequalityportal.com /q_know02.htm   (553 words)

  
 Understanding Design of Experiments: A Primer for Technologists
This book explains the basics underlying designed experiments, supplies instructions on how to use several families of convenient designs, and gives an overview of assorted subtopics in the field, including response surface analysis and mix design.
It leads the reader step-by-step through the basic concepts and practices of this methodology, using uncomplicated language and readily understandable examples to introduce background theory; this overview is included to enable the reader to optimally utilize the practical skills and techniques the book presents.
Design of Experiments is a tremendously valuable tool for exploring new processes or gaining detailed comprehension of existing ones, and then optimizing those processes...”
www.polysurfacesbookstore.com /pages/3140.html   (207 words)

  
 Design of Experiments
The classical experiment is an artificial setting, constructed so that subjects are randomly assigned to experimental and control conditions, and all conditions are held constant except for one (the experimental condition).
Often, experiments are designed to prove the obvious.
In a true experiment, this effect would also occur in the control group, and so be subtracted from the measurement of the effect in the experimental group.
krypton.mnsu.edu /~tony/courses/609/Design/Design2.html   (1007 words)

  
 Design of Experiments (DOE)
Design of Experiments (DOE) is a key tool in the Six Sigma methodology because it effectively explores the cause and effect relationship between numerous process variables and the output.
Fractional factorial designs are good alternatives to a full factorial design, especially in the initial screening stage of a project.
DOE identified the cause of ventilation noise within the alternator, and moved the problem toward resolution.
www.isixsigma.com /tt/doe   (785 words)

  
 Design of Experiments DOE Excel Template
With Design of Experiments, you just have to test at the high (+) and low (-) values for any particular "design factor" (e.g., pressure, temperature, time, etc.) from your QFD House of Quality, not every increment in between.
In my first Design of Experiments class we spent an inordinate amount of time understanding "orthogonal arrays" and all of the other "behind the scenes" mathematics, but you don't need to know all of that to conduct a Design of Experiments study.
Design of Experiments can help you shorten the time and effort required to discover the optimal conditions to produce Six Sigma quality in your delivered product or service.
www.qimacros.com /free-lean-six-sigma-tips/design-of-experiments.html   (838 words)

  
 Stata Bookstore: Design of Experiments   (Site not responding. Last check: )
Design of Experiments: Statistical Principles of Research Design and Analysis, 2nd Edition
Design of Experiments: Statistical Principles of Research Design and Analysis
The second edition of Design of Experiments: Statistical Principles of Research Design and Analysis by Robert O. Kuehl is an excellent introduction to the methods of research design.
www.stata.com /bookstore/doe.html   (705 words)

  
 Design of experiments (4-day)   (Site not responding. Last check: )
The emphasis is on the design and execution of experiments, using data collected in class, rather than on the analysis of data collected by other people.
During the course, participants run many experiments, from low-resolution screening designs to analyses of covariance (where the hammer angle of the knocks-blocks machine is the covariate).
This course is designed for people with a science or engineering background who will be running statistical experiments in their organizations.
www.greenbridge.com /free/workshop/DOE_Course.htm   (570 words)

  
 noa: Gendex module for constructing orthogonal and near-orthogonal arrays   (Site not responding. Last check: )
The 2-level supersaturated designs were discussed in Booth and Cox (1962), Lin (1993), Nguyen (1996a), Tang and Wu (1997), Cheng (1997) and Wu and Hamada (2000) Section 8.6.
The mixed level supersaturated designs were discussed in Fang, et.
The designs in examples 41 and 42 were constructed in the same way as those in Table 2 of Koukouvinos and Mantas (2005), i.e.
designcomputing.net /gendex/noa   (1372 words)

  
 Curious Cat Design of Experiments Management Improvement Links - Annotated Directory of online resources: DoE, Six ...
Design of Experiments Project A project to teach Statistical Design of Experiments to high school students.
Stat-Ease Design of Experiments, statistics and Six Sigma consultant.
Design of Experiments Definition Short discirption of DoE along with an annotated list on resources for further study.
www.curiouscat.net /guides/designofexperiments.cfm   (550 words)

  
 Renewable Energy Science Fair Project Ideas - Environmental Science Experiments
The PicoTurbine DC Experiments Kit is an inexpensive adjunct to the PicoTurbine Windmill Kit that will give you lots of additional testing options.
A more accurate way of measuring your turbine is to use a hair blow dryer, setting the heat control to "cool" or a vaccuum cleaner with the hose plugged into the discharge end.
Experiment with renewable energy science fair project ideas by creating a minature "hybrid" energy power plant.
www.super-science-fair-projects.com /renewable-energy-science-fair-project-ideas.html   (1070 words)

  
 Umetrics - Design of Experiments: Description
Design of experiments (DOE) is the most efficient approach for organizing experimental work.
DOE selects a diverse and representative set of experiments in which all factors are independent of each other despite being varied simultaneously.
The result is a causal predictive model showing the importance of all factors and their interactions.
www.umetrics.com /default.asp/pagename/methods_DOE_intro/c/1   (127 words)

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