(qt4 user guide) qualitekqualitek--4nutek-us.com/qt4-setup_userguide.pdf · 1/7/2013 1 (qt4 user...

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(QT4 User Guide)(QT4 User Guide)

QualitekQualitek--4 4 Automatic Design and Analysis of Taguchi experimentsAutomatic Design and Analysis of Taguchi experiments

Nutek, Inc. Qualitek-4 Starting Guide and Capabilities Version 0810

Getting Started withGetting Started with

QualitekQualitek--4 (QT4)4 (QT4)A A quick tour of the software capabilitiesquick tour of the software capabilities

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In case you have not yet downloaded and installed the software in your computer, please do so by visiting www.nutek-us.com/wp-dm4.html or by pasting this link as URL (http://nutek-us.com/q4wxpdemo.zip ) and directly download files from our site.

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What What does Qualitekdoes Qualitek--4 do?4 do?

� Designs Taguchi Experiments

Automatically: QT4 can design simple of mixed level experiments when you only describe the factors and levels.

Manually: QT4 allows you to select the array and assign factors to the columns as you want. Unused columns and Triangular Table information is made readily available on demand.

� Analyzes results with a few Clicks of Mouse

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Normally you would start with DESIGN of your experiment using Qualitek-4. Since, we already have an example, PISTON.Q4W, experiment designed, let us first see how Qualitek-4 can ANALYZEresults. Later, we will see how Qualitek-4 capabilities helps us DESIGNour own experiments.


Let’s Get Started Let’s Get Started --11(Install software and explore some capabilities)(Install software and explore some capabilities)

Run Qualitek-4 (QT4)program from your computer and click OK past the Registration Screen to the experiment configuration screen.

Notice that experiment file PISTON.Q4W is already loaded in memory. If not, OPEN file PISTON.Q4W from FILE menu.

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Analysis of ResultsAnalysis of Results

Proceed to Review and Analyze Results of PISTON and other example experiments. There are over 50 example experiments of all sizes included with the program.

Analysis of Results Menu Options

Piston is one of over 50 experiment files included with the DEMO.

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Standard AnalysisStandard Analysis

In Analysis menu, select Standard Analysis option.

Click “Yes” when Notice is prompted.

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Analysis Analysis -- Select QCSelect QC

Before you can proceed with analysis, you need to select the quality characteristic (QC) for the analysis. This selection helps Qualitek-4 automatically determine the optimum condition.

Select Smaller is better QC for analysis and click OK to proceed

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Analysis Analysis -- Result ReviewResult ReviewReview results and click on Graph button if you wish to view it. Click OK when done.

Results

Graph showing within trial and betweentrial variation of results.

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AnalysisAnalysis-- Main EffectsMain Effects

While in the Main Effect screen, click Plot to view plots of Main Effect. Click

OK to return to Main Effect screen.

Main Effects(Difference of factor

average effects)

Once you are in the graphics screen,click

the "<<" or ">>" button at the bottom of the

graph to display other factor plots.

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Analysis Analysis -- Interaction StudyInteraction Study

Click on Interaction button, to display interaction plots between any two factors. Select the Automatic option if you want QT4 to calculate interaction between all possible factors, even though you may not have thought about all the interactions or included them in your study.

Select the Automatic option

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QT4 calculates N (N-1)/2 possible pairs of interactions for N factors and ranks them by Severity of their presence (Severity Index, 0 - 100%). Click OK or Cancel to return to Main Effect screen and click OK to proceed to ANOVA screen.

Review the list and note the important pairs of interaction for future reference.

Analysis Analysis -- Interaction StudyInteraction Study

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Analysis Analysis --Interaction Plot Interaction Plot

You can view all possible interactions, one at a time, by double clicking on the description of the interaction.

Double click here to view

plot of interaction.

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Analysis Analysis -- ANOVAANOVA

In ANOVA screen, try POOLING the factor with least amount of influence (last column).

Double click on the factor description to POOL this factor.

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Analysis Analysis -- Modified ANOVA Modified ANOVA It is common practice to POOL insignificant factor/interaction in ANOVA. Pooling is done based on the confidence level.

Click YES to pool this factor and see the revised ANOVA.

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You can click on the Bar Graph at the bottom of ANOVA to review the graphical plot of the influence of the factors to the variability of the results.

Analysis - ANOVA Bar Graph

Click RETURN to go back to the ANOVA screen.

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You can also click on the Pie Chart at the bottom of ANOVA to review the graphical plot of the influence of the factors to the variability of the results.

Analysis - ANOVA Pie Diagram

Click RETURN to go back to the ANOVA screen.

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Analysis - Optimum Condition When you click OK in the ANOVA screen, you will see the Optimum screen shown. Qualitek-4 selects only the significant factors to identify the desirable levels and estimate the expected performance.

Click on the GRAPH to display the stacked diagram of the contribution from different factor to the estimated performance.

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Analysis Analysis –– Factor contributions Factor contributions Stacked Diagram shows how each factor contributes to the improvement

estimated.

Click RETURN to go back to Optimum screen

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Analysis - Confidence Interval

Click C.I. to calculate confidence interval on the expected performance.

Type in theconfidence level

and click OK to calculate.

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The confidence interval on the expected performance specifies the upper and lower limits within which the MEAN performance of a population samples tested in the optimum condition, is expected to fall. The experiment is considered satisfactory when the mean performance falls within this limit. Review and click OK to return to optimum screen.

Analysis - Confidence Interval

Expected performance

limits

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Generally, the analysis is completed at this point. For additional information about the expected improvement, you may want to create a graphical plot of the expected performance and predict cost savings.

Analysis -Variation Diagram

Click on Variation button.

Click OKto proceed.

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Analysis Analysis -- Plotting Variation Plotting Variation

Click on Plot to proceed to display the variation diagram.

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Analysis Analysis –– Variation Variation Reduction Plot Reduction Plot The diagram shows expected performance distribution from designs before and after the design improvement. The cost savings and capability indices are also estimated based on the experimental data. Click Return to go back to the optimum screen.

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End of AnalysisEnd of Analysis

When at optimum screen, click OK to return to the main screen. From the file menu, click on Open and select any other experiment file from the list of over 50 files (Open POUND.Q4W if you are interested in reviewing OEC).Analyze results by following steps shown before.

Proceed to learn how to design experiments.

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TWO TWO TWO TWO WAYS TO DESIGN EXPERIMENTSWAYS TO DESIGN EXPERIMENTSWAYS TO DESIGN EXPERIMENTSWAYS TO DESIGN EXPERIMENTS

Automatic Experiment DesignAutomatic Experiment DesignAutomatic Experiment DesignAutomatic Experiment Design – If you want Qualitek-4 to select the appropriate orthogonal arrays and design the experiment, select the Automatic DesignAutomatic DesignAutomatic DesignAutomatic Design option in the DESIGN menu. Qualitek-4 can design experiments for most common situations.

Manual Experiment DesignManual Experiment DesignManual Experiment DesignManual Experiment Design – In this option, you select the array and assign the factors to the appropriate columns.

Experiment Experiment Designs Designs --

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Experiment DesignsExperiment Designs-- AutomaticAutomaticTo design your own experiment, prepare a list of factors and levels for a practice experiment (say THREE factors at 2-level and ONE factor at 3-level ).

Click on the DESIGN menu and select Automatic Design.

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Experiment Designs- Input # of Factors

Check boxes for factor type and set the number of factors in each.

Click OK to proceed.

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Experiment Designs-

Confirm Array Selection

Click OK to approve the selection of the array for the experiment design.

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Experiment Experiment DesignsDesigns-- Factor Factor DescriptionsDescriptions

Describe the THREE 2-level factors and their levels. Click OK to proceed.

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Experiment Experiment DesignsDesigns-- AutomaticAutomatic

Describe the 3-level factor and its levels. Click OK to proceed.

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Experiment DesignsExperiment Designs--Factor AssignmentFactor Assignment

Click OK to proceed.

Column 1 of the L-8 array is modified to accommodate the 3-level factor in this design. Other 2-level factors are arbitrarily assigned to the remaining columns.

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Experiment Experiment DesignsDesigns--Experiment Experiment TitleTitle

This screen allow to enter some optional information about the experiment.Click OK to proceed.

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Experiment Designs -

Automatically Modified Array

Notice that the column 1 of the array is upgraded to a 3-level column using columns 2 & 3. Click OK when finished.

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Experiment DesignsExperiment Designs--Naming and Saving FileNaming and Saving File

Enter a name (8 or less characters) for the file. Then, click OK to proceed.

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Experiment DesignsExperiment Designs--End of Experiment DesignEnd of Experiment Design

Once the experiment is designed, you will be able to obtain the descriptions of the trial conditions. Select Trial Condition from the

Condition menu.

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Experiment DesignsExperiment Designs--Trial DescriptionsTrial Descriptions

Review description of one trial at a time by clicking on Next Trial. Click Return when finished.

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Experiment DesignsExperiment Designs-- AutomaticAutomatic

Once the experiments are carried out and the results collected, you will

enter results for analysis. Click on Enter Result to do so.

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Experimental Results Experimental Results --Input/EntryInput/EntryDepending on the number of samples tested in each trial condition, you will have one or more columns of results. Type-in results one column at a time.

Click OK when done.

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Experiment DesignsExperiment Designs-- File UpdateFile Update

Upon completion of results entry, you will have the option to update the file, or save it under a new name.

Click OK to update the file.

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End of DesignEnd of Design

The design of your experiment now is complete. You may now proceed to conduct the experiment as per the conditions prescribed (use CONDITION menu). To analyze the results, follow the steps demonstrated earlier with PISTON.Q4W experiment file. You can also take time to slowly explore many other capabilities of the software such as

- Signal-to-Noise ratio analysis- Loss Function- Overall evaluation Criteria (OEC)- Dynamic Characteristics, etc. .

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New Version New Version -- FeaturesFeatures

Newer Capabilities

� Data Transfer by Copy & Paste. Select RESULT menu option from the main screen

� Saving Trial Conditions to Files. Select CONDITION menu option from the main screen

� Option to Analyze Results Using Standard Deviation. Select ANALYSIS menu option from the main screen, then go for STANADARD ANALYSIS.

� Simpler Definition of S/N Ratio for Nominal Quality Characteristic

. Select ANALYSIS menu option from the main screen, then go for S/N ANALYSIS, then NOMINAL…..

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Nutek, Inc. AS9100 Aerospace Quality System Standard www.Nutek-us.com Jan. 2008 Slide 42

Capabilities & Capabilities & User Guide User Guide

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About About QualitekQualitek--4 (QT4)4 (QT4)

43Nutek, Inc. Qualitek-4 Starting Guide and Capabilities Version 0805

What does it do?What does it do?How does it do it?How does it do it?

� Help you DESIGN Taguchi Experiments

Automatically: QT4 can design simple or mixed level experiments when you only describe the factors and

levels.

Manually: QT4 allows you to select the array and assign factors to the columns as you want. Unused column setting

options and Triangular Table information is made readily

available on demand.

� Help you ANALYZE results with a few Clicks of Mouse


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What Else Does it What Else Does it have?have?

A few of the attractive capabilities:

� Experiment planning guide

� Dynamic characteristics

� Variation diagram

� Common population statistics

� On-line tips and help

� Five Easy Steps to DOE (benefit from DOE without having to learn the details of DOE)


How does QualitekHow does Qualitek--4 Design Experiments?4 Design Experiments?

� QT4 always starts with PISTON experiment (screen Shots)

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How does QualitekHow does Qualitek--4 Design Experiments?4 Design Experiments?

� Before designing experiments, you may follow the planning steps outlined in QT4

Use Automatic Design When Unsure of RulesUse Automatic Design When Unsure of Rules


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All You Need is to Enter Numbers of Factors All You Need is to Enter Numbers of Factors (Three 2(Three 2--level & One 3level & One 3--level)level)


QT4 Selects the Array Necessary for the DesignQT4 Selects the Array Necessary for the Design


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QT4 Asks for Descriptions of QT4 Asks for Descriptions of 22--level Factors and their Levelslevel Factors and their Levels


QT4 Asks for Descriptions of QT4 Asks for Descriptions of 33--level Factor and its Levelslevel Factor and its Levels


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Screen Showing Factor and their Screen Showing Factor and their Column AssignmentsColumn Assignments


Input for Experiment Title & DescriptionInput for Experiment Title & Description


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Automatically Modified Automatically Modified Orthogonal ArrayOrthogonal Array


Naming the Experiment FileNaming the Experiment File


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Describing Experimental ConditionsDescribing Experimental Conditions


Description of Individual Trial ConditionDescription of Individual Trial Condition


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At Test Completion At Test Completion --Option for Entering ResultsOption for Entering Results


Entering Results Upon Completion of Entering Results Upon Completion of TestsTests


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Performing Standard Analysis of Performing Standard Analysis of ResultsResults


QT4 Recommends S/N Analysis in QT4 Recommends S/N Analysis in case of Multiple Sample Resultscase of Multiple Sample Results


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Selection of Applicable Quality Selection of Applicable Quality CharacteristicCharacteristic


Results and their Trial AveragesResults and their Trial Averages


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Average Effects of Factor LevelsAverage Effects of Factor Levels


Multiple Factor Influence PlotMultiple Factor Influence Plot


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Plot of Factor InfluencePlot of Factor Influence(Least Squares Fit for 3 & 4(Least Squares Fit for 3 & 4--level Factors)level Factors)


Automatic Check of Presence of Automatic Check of Presence of InteractionsInteractions


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Factor Interactions in Order of Factor Interactions in Order of SeveritySeverity


Severity of Interactions Severity of Interactions


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Interaction Between a 2Interaction Between a 2--level level Factor and a 3Factor and a 3--level factorlevel factor


Interaction Between Two 2Interaction Between Two 2--level level FactorsFactors


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ANOVA ANOVA -- Relative factor influence to the variation of resultsRelative factor influence to the variation of results


Pooling Based on Confidence LevelPooling Based on Confidence Level


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Relative Influence of FactorRelative Influence of Factor


Pie Diagram of Factor InfluencePie Diagram of Factor Influence


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Expected Performance at the Optimum Expected Performance at the Optimum ConditionCondition


Specifying the Desired Confidence LevelSpecifying the Desired Confidence Level


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Confidence Interval on Optimum Confidence Interval on Optimum PerformancePerformance


Estimate with Factor (Sugar) at a Level Estimate with Factor (Sugar) at a Level Other than OptimumOther than Optimum


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Additional QualitekAdditional Qualitek--4 Capabilities4 Capabilities


Input for Variation DiagramInput for Variation Diagram


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Variation Diagram Variation Diagram with Performance & Savings Statisticswith Performance & Savings Statistics


Capability to Calculate Population StatisticsCapability to Calculate Population Statistics


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Tips for Getting Started and Screen Capture Tips for Getting Started and Screen Capture

To review an example experiment with dynamic characteristics, you will open file DC-AS400.Q4W as shown below.

You can also benefit from tips provided under the Practice Tips menu as shown.

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Process Diagram for Dynamic CharacteristicsProcess Diagram for Dynamic Characteristics

You will see this process diagram when you proceed to analyze the results of DC-AS400.Q4W experiment by selecting Dynamic Characteristics in Analysis menu.

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Five Easy Steps for Problem SolvingFive Easy Steps for Problem Solving

An alternative to standard analysis, this is an additional capability to utilize the L-8 array experiment for problem solving applications where the user need not be familiar with the details of DOE technique.

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Dealing With Multiple CharacteristicsDealing With Multiple Characteristics


• Qualitek-4 has capabilities to analyze MULTIPLE characteristics (see #7 above, http://nutek-us.com/wp-oec.html ). But, since it is aproprietery method of Nutek (not a part of the Taguchi experimental design), you must review and understand the application concepts before using software.

• Open POUND.Q4W file to review its multiple data combined into a single index called Overall Evaluation Criterion (OEC). Once you opened POUND.Q4W, select Evaluation Criteria from EDIT menu to review results.

• For your own experiments, collect data for multiple criteria as you planned.

•To enter results, select MULTIPLE CRITERIA from the RESULT menu. Enter results following instructions.

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OEC OEC -- Multiple CharacteristicsMultiple Characteristics


Thank YouThank You

� Training & Workshop

� Assistance with application

� Text Books

� Software (Free DEMO download)

Nutek, Inc.3 829 Quarton RoadBloomfield Hills, MI [email protected] www.Nutek-us.com

Web site links:

All Seminar Topics: http://Nutek-us.com/wp-sem.htmlDesign for Six Sigma (DFSS) http://nutek-us.com/wp-dfss.htmlTaguchi/DOE Seminar: http://nutek-us.com/wp-s4d.htmlOnsite DOE seminar: http://nutek-us.com/wp-ons.html

DOE Application Support: http://nutek-us.com/wp-support.htmlConsulting & Problem Solving: http://nutek-us.com/wp-sps.htmlQualitek-4 Software: http://nutek-us.com/wp-q4w.html

Project Management Training: http://nutek-us.com/wp-pmp.html

Testimonials: http://nutek-us.com/wp-q4w-eval.htmlNutek Client List: http://nutek-us.com/wp-nut.html

(qt4 user guide) qualitekqualitek--4nutek-us.com/qt4-setup_userguide.pdf · 1/7/2013 1 (qt4 user...

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